Revolving Door Energy Calculator
Contents
1. The RDEC Evaluation window is closed by clicking on Done at the lower right Revision B 2011 11 22 Page Il of 28 Parameters by Door Type The following pages describe in the order of increasing complexity of input the parameters that must be provided for each of the five door types handled by RDEC There are two considerations that apply to all door types which are described here These are e The relationship between the weight and mass of a door component and e The ability of RDEC to determine the weight of a door panel based on its width Weight vs mass The kinetic energy of any moving object depends upon its mass However when using English units it is customary to use the weight of an object as a proxy for its mass Of the possible English units of weight RDEC uses the pound exclusively The standard English unit of mass which the kinetic energy equations require is the slug The pound is actually a unit of force and not of mass but as the mass of an object is directly proportional to its weight it is possible to determine the mass of an object from its weight if the constant of proportionality is known By convention it is assumed that the weight of all objects is determined at sea level where the acceleration of gravity g is taken to be 32 17 ft sec Thus if an object has weight w its mass in slugs is determined simply by dividing its weight by g That is mass in slugs w g Because weight is such2. Where curved panel should be Axis of rotation f Axis of rotation Vertex Vertex Arc of radius d2 about vertex Arc of radius d2 about vertex Flat showcase panels with correctly Flat showcase panels with incorrectly specified door diameter D specified door diameter D The Figure at the left illustrates that the flat showcase panels which pivot around the end of the radially directed wing at the point labeled Vertex intersect the curved showcase panel at the points where the arcs of radius dl and d2 about the vertex intersect the curved showcase panel The radius of the curved showcase panel is taken to be half the overall door diameter That is D 2 The Figure at the right illustrates the effect of specifying a door diameter D that is larger than it should be For example if D were set to the inside diameter of the cylinder within Revision B 2011 11 22 Page 18 of 28 Parameters 2 wing door with showcases continued which the door rotates the tips of the flat showcase panels would rotate further along the dashed arcs of radii dl and d2 than they should until they meet the incorrectly specified curved panel whose radius about the axis of rotation is too large As a consequence the angle between the flat showcase panels at the vertex is smaller than it should be This causes the centers of mass of the flat showcase panels to move further from the axis of rotation than they should be
3. centimeters or millimeters r panel The weight of a radially directed wing in pounds or kilograms ANSI weight Aluminum and ANSI Clad options can also be selected to determine weight Core panel The weight of an individual core panel in pounds or kilograms ANSI weight Aluminum and ANSI Clad options can also be selected to determine weight Q Rotation rate of door in rpm revolutions per minute Note that in the case of 3 wing and 4 wing doors with a core RDEC infers the widths of the core panels from D r and the assumption that the core is either an equilateral triangle or a square Consequently you do not have to enter the width of a core panel and such widths are not requested by RDEC Co rotating ceiling point and extended objects are available optionally from the RDEC Configuration panel See beginning on page 21 for a discussion of these options Revision B 2011 11 22 Page 15 of 28 Parameters 2 wing door with showcases 2 wing door with showcases Note Parameters are specified for one half of the door RDEC assumes that the other half of the door is dimensionally identical and takes both halves into account when calculating rotational kinetic energy D r dl d2 Curved Panel width r panel weight Revision B 2011 11 22 The overall diameter of the door Units can be feet inches meters centimeters or millimeters The width of a radially directed wing Units can be feet inches meters centimeter
4. lt Enter gt lt Tab left gt or lt Tab right gt and proceed as described above Revision B 2011 11 22 Page 24 of 28 Parameters Extended objects continued If the name of the new extended object you have entered is identical to one already defined and consequently is already on the Name ext d objects drop down list the Add an extended object box will not open to allow you to enter parameter values for the object If this occurs you can either change the name you have entered to another not already defined or you can edit the parameter values associated with the object you have named by selecting Extended object from the drop down list associated with EDIT at the top left of the RDEC window If any of the parameters you have entered in the Add an extended object window are flagged subsequently by RDEC as being in error you can likewise edit your entries by selecting Extended object from the drop down list associated with EDIT at the top left of the RDEC window The extended object whose parameters will be opened for editing is the one whose name is currently displayed in the Name ext d objects entry box in the RDEC Dimensions panel An extended object is characterized by a mass distribution whose self moment of inertia is not negligible and must therefore be included in the calculation of the total kinetic energy of the door If the self moment of inertia is in fact negligible it is preferable
5. name that currently appears in the Name point objects box This does not result in the deletion of the currently named object but rather merely clears space for you to enter the name of the next point object you want to define Enter the name of the new object and hit lt Enter gt lt Tab left gt or lt Tab right gt and proceed as described above If the name of the new point object you have entered is identical to one already defined and consequently is already on the Name point objects drop down list the Add a point object box will not open to allow you to enter parameter values for the object If this occurs you can either change the name you have entered to another not already defined Revision B 2011 11 22 Page 22 of 28 or you can edit the parameter values associated with the object you have named by selecting Point object from the drop down list associated with EDIT at the top left of the RDEC window If any of the parameters you have entered in the Add a point object window are flagged subsequently by RDEC as being in error you can likewise edit your entries by selecting Point object from the drop down list associated with EDIT at the top left of the RDEC window The point object whose parameters will be opened for editing is the one whose name is currently displayed in the Name point objects entry box in the RDEC Dimensions panel A point object is characterized by a mass distribution whose s
6. specific physical characteristics of the door are communicated to RDEC Comprehensive explanations of all requested parameters appear in the RDEC Explanation panel when you mouse over the name of the parameter thus making RDEC use self documenting This feature operates throughout Revision B 2011 11 22 Page 7 of 28 Step 2 DIMENSIONS and WEIGHTS Ej Revolving Door Energy Calculator 51 xj File Edit Help r Configuration m Dimensions m Weights Number of wings 2 y D 13 1 ift A Ceiling diameter 13 2 y ft 3 With showcases faway Z fas zla da Name point objects flower pot a r panel weight 89 1 zje 4 Celing ves z ajes A oh gt Eee ert d1 panel 63 3 zje 43 Point objects ves y d2 40 zirt dy d2 panel EERE b af it Extended objects No gt Curved panel y ft Aq Curved panel weight 307 3 x 4 m Showcase floor ves Showcase floor weight 50 5 y lb 4 Tm rlllustrative diagram not drawn to scale Results a Ceiling weight 203 Ib 4 W r Explanation This is the weight of ONE panel specified as d2 in the diagram If panel frame and glass are ANSI standard materials the following choices can be selected from the dropdown list Weight based on panel width in inches will be computed using ANSI aluminum 2 13 lb fin x width inches 37 7 Ib ANSI clad 2 38 Ib fin x width inches 58 5 lb Although these expressions are
7. that you use instead the Point objects option in the RDEC Configuration panel to characterize the object Example As an example of the use of the Extended objects option with English units consider that a 6 foot long horizontal beam weighing 25 pounds is attached to the ceiling and revolves with the door On the assumption that the mass of the beam is uniform along its length the center of mass of the beam is located at its center For the purposes of RDEC the moment of inertia of a uniform beam about its own center of mass is 1 w2 12 where W is the weight of the beam in pounds L is the length of the beam and is its moment of inertia about its center of mass Note that the above is just the well known equation for the moment of inertia about its own center of mass of a uniform beam of mass M but with W substituted for the mass M For purposes of the RDEC program when using English units W pounds should always be substituted as above for the mass slugs in any moment of inertia expression that you use or derive However when using metric units the true mass kilograms rather than the weight of the object should be used Continuing with the example the moment of inertia of the subject beam about its own center of mass is using the above expression Revision B 2011 11 22 Page 25 of 28 Parameters Extended objects continued 2 moment of inertia a 75 Ib ft On the assumption that the center of mass
8. with respect to each other as the door rotates e The axis of rotation of the door is vertical and is located at the geometric center of the assembly of moving door components e The thickness of vertically oriented panels is a small fraction of the width of the panel e The distribution of mass within flat vertically oriented panels is uniform in the horizontal direction across the width of such panels and is immaterial in the vertical direction e The distribution of mass within curved panels all points of which are at a common fixed horizontal distance from the axis of rotation is immaterial in both the horizontal and vertical directions e The distribution of mass within horizontally oriented surfaces such as a co rotating ceiling and showcase floors is uniform in the horizontal direction and immaterial in the vertical direction e The thickness of horizontally oriented surfaces such as a co rotating ceiling and showcase floors is immaterial The kinetic energy equations and results calculated and displayed by the RDEC program apply equally to all door configurations in which the distances from the axis of rotation of the centers of mass of the door components and the moments of inertia of the components about their own centers of mass are identical Consequently the angular distribution of door components about the axis of rotation is immaterial For example the flat radially directed panels of a 3 wing or 4 wing door need not
9. And the curved showcase panel is also further from the axis of rotation than it should be Both errors act to increase the calculated kinetic energy of the door above the correct value corresponding to the Figure at the left Moreover the error also results in the showcase floor which is the roughly triangular area bounded by the two flat showcase panels and the curved panel having the incorrect shape and location This will introduce yet additional errors in the kinetic energy calculation if you have elected to include the effect of the showcase floors Showcase floor RDEC understands that the shape and location of the showcase floor are determined by the limits set by the two flat showcase panels and the curved panel to which the flat showcase panels are attached The showcase floors are illustrated by the grey areas shown in the two Figures below Axis of rotation Curved panel Axis of rotation Curved panel Showcase floor vertex angle less Showcase floor vertex angle than 180 degrees greater than 180 degrees The Figure on the left illustrates the usual situation in which the angle at the vertex of the showcase is less than 180 degrees while the Figure on the right illustrates the situation in which the vertex angle is greater than 180 degrees While it is currently unlikely that you will encounter a showcase with a vertex angle greater than 180 degrees as on the right the Revision B 2011 11 22 Pa
10. Revolving Door Energy Calculator USERS MANUAL Davis Associates Inc 43 Holden Road Newton MA 02465 1909 U S A www davis inc com Copyright 2011 by Davis Associates Inc Revision B 2011 11 22 TERMS AND CONDITIONS OF USE The RDEC Revolving Door Energy Calculator program and associated support materials are subject to TERMS AND CONDITIONS OF USE with which you must agree and which you must accept before using the RDEC program or associated support materials A copy of the TERMS AND CONDITIONS OF USE is displayed each time the RDEC program is invoked A copy is also available on the Davis Associates Inc website at www davis inc com ke terms condx html This is an active hyperlink that will take you directly to the TERMS AND CONDITIONS OF USE if you are viewing this document on your computer and your computer has a web browser and access to the internet Otherwise manually enter the above web address into your browser to view the TERMS AND CONDITIONS OF USE Revision B 2011 11 22 Page 2 of 28 CONTENTS Applicabilityand Use 202 AAA AA AR oe 4 MOI CON a AA ARAM OR EEO REA Cabs 5 OVERVIEW a AR DEN OO ES ASAE RE OS 6 Step CONFIGURATION ccc ccc cece cece cece cece eceee 7 Step 2 DIMENSIONS and WEIGHTS cece ccc eee eceee 8 Step 3 CALCULATE and EVALUATE 0 cece ee eee eee 9 CACAO a cdo eee ERAS GORA AA ESTAS 9 ESTATE A Hie aie eee eine SW aS Ae was as S
11. a Ceiling weight 203 y lb 4 m 105 pound feet at 3 7 RPM L 0 571 RPM at 2 5 pound feet r Explanation 0 954 RPM at 7 0 pound feet Configuration dl All Dimension items must be completed before all Weight Number of wings 2 items can be seen Has ceiling Yes Has point object Yes Has extended object No Has showcase floor Yes Dimension D 13 1 ft Dimension r 3 8 ft Dimension dl 2 8 ft Dimension d2 4 0 ft Ceiling diameter 13 2 ft Comments typed here will be saved with file Point objects 7 Object flower pot on every wing Veight 45 lb Distance from center 4 6 ft x panel weight 89 1 1b dl panel weight 63 3 lb d2 panel weight 93 8 lb gt z RPM 3 7 4 Evaluate Quit The kinetic energy of the entire specified door configuration at the current door rotation rate is displayed at the top of the Results window followed by the door rotation rates at which the entire configuration will carry 2 5 Ib ft and 7 0 Ib ft of kinetic energy The up and down arrows next to the RPM box directly below the Results window can be used to select any door rotation rate within the range O 1 rpm to 10 0 rpm in increments of 0 1 rpm The kinetic energy of the specified door configuration is re evaluated and displayed every time the rotation rate is changed A scroll bar on the right side of the Results Revision B 2011 11 22 Page 9 of 28 Step 3 Continued window can be used to view the balance of door configuration
12. a familiar proxy for mass in the English system RDEC allows you to specify the mass of door components by specifying rather the weight of the component RDEC then automatically divides the weight you specify by g to determine the mass of the object in slugs On the other hand RDEC also allows you to input the weights of door components in kilograms kg though the kilogram is not a unit of weight but a genuine unit of mass in the Metric system RDEC understands the distinction and handles the calculation of kinetic energy appropriately This consideration arises also when specifying the moment of inertia of an Extended object in the English system of units While the English unit of moment of inertia is slug ft for consistency you are asked rather to specify pound ft Just as with weight in this case RDEC automatically divides by g to convert pound ft internally to slug ft Revision B 2011 11 22 Page 12 of 28 Weight as a function of width The weights of all moving door components must be specified by the user in order for their contributions to the kinetic energy of the door to be determined You have two options when specifying the weights of door wings and panels as follows e Enter the weight of the door panel or wing directly or e Allow RDEC to determine the weight of the door panel or wing from its width These options apply only to door panels and wings and not to other components such as a co rotating cei
13. anel extending ahead of the showcase in the direction of rotation is less than the extent extending aft of the showcase However the amount by which the curved panels extend fore and aft of the showcases is immaterial because the radial distance of all mass elements within the curved panels is fixed and remains unaltered for all combinations of fore and aft extent This applies as well to the situation in which the fore and aft extents of the curved showcase panel attached to one showcase are not identical to those of the curved panel attached to the other showcase The kinetic energy equations employed by RDEC for 2 wing revolving doors with curved showcase panels apply equally to all combinations of fore and aft extent Thus you need not be concerned if the placement of the curved showcase panels of the door for which you want kinetic energy results from RDEC does not match the illustrations with respect to fore and aft extent The kinetic energy equations and results reported by RDEC apply equally to all such variations of placement Revision B 2011 11 22 Page 20 of 28 Parameters all Doors Parameters Ceiling When you select a co rotating ceiling for inclusion in the kinetic energy calculations the Ceiling diameter parameter box opens in the RDEC Dimensions panel and the Ceiling weight parameter box opens in the RDEC Weights panel Ceiling The diameter of the co rotating ceiling Not required to be equal to the diameter overall door
14. be uniformly spaced around the axis of rotation As a further example with the identical input parameters the RDEC kinetic energy results apply equally to the configuration on the right as to the one on the left N D Revision B 2011 11 22 Page 4 of 28 Introduction What is kinetic energy and why does it matter Kinetic energy is as its name implies the energy carried by an object as a consequence of its motion It is important because the force with which a moving object strikes another is directly proportional to the kinetic energy carried by the striking object This means that kinetic energy is the appropriate measure of the potential of a moving object to cause injury if it strikes a person While kinetic energy is directly proportional to the mass of the moving object it is proportional to the square of its speed Thus if the speed of the object doubles the force of its impact will all else being equal increase by a factor of four Because it represents the potential to cause injury and because it increases rapidly with increasing speed the ANSI BHMA American National Standards Institute Builders Hardware Manufacturers Association A156 27 national standard for manual and automatic revolving doors mandates limits on the kinetic energy of a revolving door in various ways in the interest of user safety For example wing sensors are required if an automatic revolving door carries more than 2 5 Ib ft of kinetic energy and c
15. diameter D Units can be feet inches meters centimeters or millimeters Ceiling The weight of the co rotating ceiling in pounds or kilograms ANSI weight Aluminum and Clad options not available Note that the weight of the ceiling is assumed to be distributed uniformly over the circular area of the ceiling If non uniformly distributed masses rotate with the ceiling such as structural beams or a control box these should be accounted for using the Point objects and Extended objects options as appropriate The weight specified here for the ceiling should be restricted to that portion of the weight of the ceiling that is uniformly distributed over the entire ceiling area and should not include the weights of the non uniformly distributed masses The latter are properly accounted for using the Point objects and Extended objects options Revision B 2011 11 22 Page 21 of 28 Parameters Point objects FigRevolving Door Energy Calculator xj When you select a point object for inclusion in the Add a point object kinetic energy calculations the Name point objects Name potted plant parameter box opens in the RDEC Dimensions panel into which you should enter the name maximum of 20 characters by which you want the point object to be designated On hitting lt Enter gt lt Tab left gt or lt Tab right gt a new box labeled Add a point object will open within which you can enter the following a a parameters characterizing
16. e eS apes 10 Parameters by Door TADEO AAA Mea east 12 Weight US mass soles sare ae asa nian ae ow OW wie wee os Ri we SIR AR ae 12 Weight as a function of Width 0 ccc ec ee cee ee ooo tees 13 Parameters 3 wing and 4 wing doors with no core 2 eee ee ee eee 14 Parameters 3 wing and 4 wing doors with a core ccc cece eee 15 Parameters 2 wing door with showcases ooo o oo o o 16 Additional Considerations cece cece eee eee eee eee 17 PrditiOtia CHECKS eriein teei an anata a Bae eee eel a a 17 Correct specification of diameter 0 cc ce ee ee ec eee 18 Showcase fFIOOr cise Geli vw soc ee oe eves a dd 19 Curved panel placement ooooooocoooomoom oo roo 20 Parameters all DOS AAA PATE ROR AGRA 21 Parameters Ceiling ati ARA RARA AAA SA 21 Parameters POME ODESSA AA a 22 Parameters Extended objects s s c 040 sia bed ia a a 24 Exampel A O DL A ae 25 Example IZ dE ARAS ete TA aR AIR EAS ee 26 EDO UE A A Ra RAR ERATOR ERE EE 28 Revision B 2011 11 22 Page 3 of 28 Revolving Door Energy Calculator Applicability and Use The kinetic energy equations and results calculated and displayed by the Revolving Door Energy Calculator RDEC program apply when the following conditions are met e The moving components of the revolving door undergo rigid rotation That is they are rigidly ganged together so that they maintain fixed positions and orientations
17. e panel is not so wide that when folded completely back against the radially directed panel to which it is attached it reaches or extends beyond the further curved panel also at the distance D 2 from the axis of rotation Revision B 2011 11 22 Page 17 of 28 Parameters 2 wing door with showcases continued e That the flat showcase panels from one showcase do not intersect the flat panels of the other showcase Correct specification of diameter It is important that the diameter D correspond to the distance measured through the axis of rotation between the curved showcase panels and not for example the inside diameter of the cylinder within which the door rotates Otherwise the RDEC calculations of kinetic energy may be invalid for the reasons explained below RDEC uses the width of the radial panel r the widths of the flat showcase panels dl and d2 and the overall diameter of the door D to determine the vertex angle of the showcase That is the angle between the two flat showcase panels where they join the end of the radial panel This in turn determines the distance along the curved showcase panel between the points at which the two flat showcase panels meet the curved showcase panel How this is done is illustrated in the Figures below Arc of radius dl about vertex Arc of radius dl about vertex gt Curved panel radius D 2 about va axis of rotation Curved panel radius D 2 about axis of rotation
18. elf moment of inertia is negligible Consequently only the mass of the object and its distance from the axis of rotation materially affect the overall kinetic energy of the door If the self moment of inertia is not negligible you should use instead the Extended objects option in the RDEC Configuration panel to characterize the object Revision B 2011 11 22 Page 23 of 28 Parameters Extended objects xI When you select an extended object for inclusion in the ES kinetic energy calculations the Name ext d objects Namal Jesivo beam parameter box opens in the RDEC Dimensions panel into eet E which you should enter the name maximum of 20 3 Distance from axis of rotation 8 2 E characters by which you want the extended object to be 4 designated On hitting lt Enter gt lt Tab right gt or lt Tab Moment of inertia about own 75 lb ft 02 center of mass On every wing I left gt a new box labeled Add an extended object will open within which you can enter the following Cancel Add parameters characterizing the extended object A maximum of eight extended objects can be defined Name The name by which you want the extended object to be designated This will already be filled in for you but you may change the filled in name Weight The weight of the extended object in pounds or kilograms Distance The radial distance at which the center of mass of the named extended from axis object is located from the axis o
19. ertain doors are not allowed to carry more than 7 0 Ib ft of kinetic energy It is important to recognize that kinetic energy is a single quantity that is characteristic of the entire revolving door much as is its weight Neither the weight of the door nor its rotational kinetic energy depends upon location within the door The entire door has just a single weight and at a given rotation speed the entire door also has just a single kinetic energy The kinetic energy of a revolving door is the sum of the kinetic energies of its component parts Each component has a different location and orientation within the door and generally a unique size and shape Because points closer to the periphery of the door move faster than points closer to the axis of rotation the kinetic energy of each contributing component must be calculated separately and then combined Consequently calculating the kinetic energy of a revolving door is generally much more complicated than calculating for a sliding swinging or folding door The Revolving Door Energy Calculator RDEC program was created to make calculation of the kinetic energy of a revolving door quick easy and accurate All of the required complicated equations for the various door components are contained within RDEC The user has only to enter the basic parameters that describe the door diameter rotation rate weights or masses of wings etc and RDEC does the rest Moreover RDEC contains a host
20. f rotation of the door Units can be feet of inches meters centimeters or millimeters Must not exceed the larger of rotation the door radius or if specified the ceiling radius Moment The moment of inertia of the named extended object about its own of inertia center of mass That is its self moment of inertia Units can be Ib ft or kg m On every Check this box if a duplicate of the named extended object is to be wing associated with every wing of the door Otherwise if only one instance of the extended object is to be included leave this box unchecked Once you have hit Add in the Add an extended object box the name of the extended object will be added to the drop down list associated with the Name ext d objects box in the RDEC Dimensions panel The list can be viewed by clicking on the down arrow associated with the Name ext d objects box Names can be recalled from the list by clicking on the desired name in the drop down list The name currently appearing in the box can be deleted from the list by clicking on the trash can to the right of the box To add a new extended object highlight and delete with the lt Delete gt key or otherwise change the name that currently appears in the Name ext d objects box This does not result in the deletion of the currently named object but rather merely clears space for you to enter the name of the next extended object you want to define Enter the name of the new object and hit
21. for width in inches you Comments typed here will be saved with file may enter width under Dimensions in any of the recognized units and the program will make the necessary conversions for use with these expressions Tf these expressions are not correct for this panel Type the weight of the panel in your chosen units directly into the box q ira RPM 3 7 4 cai Exsuao Quit The widths of the various door panels are entered in the RDEC Dimensions panel whereas the weights of the respective panels are entered in the Weights panel The up down arrows to the right of each data entry box are used to select the units assigned to the respective entry Although all panel width entries in the illustration above are in feet and all weight entries in pounds you are free to mix units arbitrarily Once you enter a value in one of the boxes and hit lt Enter gt lt Tab left gt or lt Tab right gt the value enters a list associated with the box that can be viewed by clicking on the down arrow associated with the box Values can be recalled from the list by clicking on the desired value in the drop down list The value currently appearing in the box can be deleted from the list by clicking on the trash can to the right of the box Revision B 2011 11 22 Page 8 of 28 Step 3 CALCULATE and EVALUATE When the Calculate or the Evaluate button is clicked after entering all required dimensions and we
22. ge 19 of 28 Parameters 2 wing door with showcases continued kinetic energy equations used by RDEC are nevertheless set up to accommodate both situations The equations employed by RDEC to calculate the contribution to the kinetic energy of the door by the showcase floors are exact for the shapes illustrated That is they take full and proper account of the fact that two sides of the showcase floors are straight while the third is bounded by an arc of radius equal to half the overall diameter of the door Moreover they handle equally well any vertex angle whether less than equal to or greater than 180 degrees Curved panel placement The rotational kinetic energy of an element of mass revolving around a specified axis at a fixed radial distance from the axis is entirely independent of the angular position of the mass element about the axis This applies as well to collections of mass elements Since all of the mass elements comprising the curved showcase panels are at the same radial distance from the axis of rotation and since they all rotate with the same speed the location of attachment of the curved panel to the two flat showcase panels is immaterial and has no bearing on the kinetic energy results calculated by RDEC In the illustrations of 2 wing revolving doors provided here for purposes of labeling and defining input parameters the curved panels are shown attached to the showcases in such a way that the extent of the curved p
23. ial which of the two flat showcase panels is considered first and which is considered second Curved The weight of an individual curved panel in pounds or kilograms ANSI panel Aluminum or ANSI Clad options can also be selected to determine weight weight Showcase The total weight of an individual showcase floor in pounds or kilograms floor ANSI Aluminum and Clad options not available Note that this weight parameter is required only if you have selected the Showcase floor option in the RDEC Configuration panel Q Rotation rate of door in rpm revolutions per minute Co rotating ceiling point and extended objects are available optionally from the RDEC Configuration panel See beginning on page 21 for a discussion of these options Additional Considerations Additional checks Because the geometry of a 2 wing revolving door with showcases is considerably more complicated than that of the other types of doors RDEC performs checks on the consistency of parameters you enter that have no analog with the other door types In addition to the more obvious checks such as that a wing width cannot be specified as being negative RDEC performs the following checks on 2 wing revolving doors with showcases e That the width of each flat showcase panel when added to the width of the radially directed panel is sufficient to reach the closer curved panel located at the distance D 2 from the axis of rotation e That the width of each flat showcas
24. ights for the door configuration RDEC will first check for and flag any improper or inconsistent data values and will color the relevant data entry boxes either pink or yellow Pink signifies inconsistent values whereas yellow signifies missing or improper values You must make the necessary parameter corrections if any are required before the RDEC Calculate or Evaluate functions will execute Calculate When the Calculate button is clicked the Results window will display the kinetic energy results and a summary of the selections and associated values entered by the user as illustrated below The Results apply to the entire door configuration that you specify with all components being included EjRevolving Door Energy Calculator a z BI xj File Edit Help Configuration Dimensions r Weights Number of wings 2 y oji Aq Ceiling diameter 13 2 y ft yy With showcases Alway Y r 3 8 gt ft Ja Name point objects fower pot i r panel weight 89 1 y lb 1 is Wt 45 lb Distance from center 4 6 ft aj on Celing ves y aif2e zit Aq Pro di panel 63 3 yo 43 Point objects ves Y afao zirt aay d2 panel 93 8 z o 43 Extended objects No y Curved panel y ft Ja Curved panel weight 307 3 x hb 4 Ww Showcase floor Yes y Showcase floor weight 50 5 lb 4 mi Illustrative diagram not drawn to scale Results Results for the configuration specified
25. ling The drop down lists associated with weights to be entered in the Weights panel of RDEC contain two choices e ANSI Aluminum and e ANSI Clad generally brass or stainless steel applied to aluminum frames You can either enter the weight of the panel or wing directly in the input box or you can select ANSI Aluminum or ANSI Clad from the drop down list If you select from the drop down list RDEC will determine the weight of the panel or wing from its width using the appropriate following formula ANSI Aluminum specified weight 2 13 Ib in x width in inches 37 7 Ib ANSI Clad specified weight 2 38 Ib in x width in inches 58 5 Ib These formulae correspond to the panel weights specified in the kinetic energy tables 1A and 1B in the ANSI BHMA A1I56 27 2011 national standard for manual and automatic revolving doors approved on June 20 2011 In most cases you will have been asked to enter the width of the door panel which when converted internally to inches by RDEC will be used to determine the weight of the panel from the above formulae should you select ANSI Aluminum or ANSI Clad However in some circumstances you will not have been asked for the panel or wing width In the case of flat core panels for 3 wing and 4 wing doors the panel width will have been inferred by RDEC In other circumstances you will be required to enter the panel width to enable RDEC to determine the weight of the panel from one of the formulae ab
26. nergy calculation RPM 3 6 E 16 7 seconds per revolution If Calculate was selected prior to selecting Evaluate the door rotation rate in rpm used by Evaluate will be inherited from the value currently being used by Calculate Revision B 2011 11 22 Page 10 of 28 Step 3 Continued Like the RDEC Calculate window the Evaluation window includes an up down arrow at the bottom that can be used to select the rotation rate of the door within the range 0 1 rpm to 10 0 rpm in increments of 0 1 rpm The total and contributing kinetic energy values of all door components are re evaluated and displayed every time the rotation rate is changed By selecting components using the check boxes in the Include column and next to the names of any Point objects or Extended objects in the Component column and by varying the rotation rate you can explore at will the effect of arbitrary combinations of components and door rotation rate The RDEC Evaluation window also includes at the lower left a graph of the kinetic energy of the currently selected combination of door components as a function of door rotation rate in rpm The background of the graph is shaded light green for kinetic energies in the range O to 2 5 Ib ft light yellow in the range 2 5 to 7 0 Ib ft and light red in the range above 7 0 Ib ft The graph is recalculated and displayed each time the combination of components is changed using the check boxes Energy pound feet
27. of additional features to assist in the analysis of design variations including the ability to account for components not ordinarily considered such as a co rotating ceiling showcase floors control boxes rotating with the door and novel objects placed within showcases or elsewhere on the door Revision B 2011 11 22 Page 5 of 28 Overview There are three basic steps required by the Revolving Door Energy Calculator RDEC l CONFIGURATION Select the type of revolving door from the following list a is ia iii ela tai a London N gq oO lt Ed lt oO ot a O 2 Lonas coco Looe eee bee ss E E ee ee 2 DIMENSIONS and WEIGHTS Specify the parameters that describe each component of the selected door type 3 CALCULATE and EVALUATE Have RDEC calculate and evaluate the kinetic energy results for any combination of the specified door components at any given door rotation rate Revision B 2011 11 22 Page 6 of 28 Step 1 CONFIGURATION Fij Revolving Door Energy Calculator iolxi File Edit Help Configuration r Dimensions r Weights Number of wings ke z D Ty ft 4 mi f Ceiling diameter 7 ft 3 W With sh es away 7 ft AW r panel weight y lb 4 W Ceiling ves gt di Ty ft 4 m4 di panel 4 b 4 m Point objects No y d2 Ty ft 4 W d2 panel 4 lb 4 Ww Extended objects No y Showcase floor HS Curved panel y ft 4 Ww L r Illus
28. of the beam is located 3 2 feet from the axis of rotation of the door the moment of inertia of 75 Ib ft along with the weight of 25 pounds and the distance to the center of mass of 3 2 feet are entered into the appropriate boxes in the Add an extended object box as illustrated at the top of page 24 Example 2 As a second example of the use of the Extended objects option consider a 3 wing revolving door with a core that includes a core floor and that the contribution to the overall kinetic energy of the door from the core floor is to be included in the RDEC calculations Since the moment of inertia of the core floor about its own center of mass is not negligible it is handled appropriately via the Extended objects option To use the Extended objects option for this purpose it is necessary for you to determine and enter three parameters the radial distance of the center of mass of the floor from the axis of rotation the weight of the floor and the moment of inertia of the floor about its own center of mass Since the cross section of the door core and hence the shape of the floor is a regular polygon and since the geometric center of the polygon which is also its center of mass coincides with the axis of rotation of the door the radial distance of the center of mass from the axis of rotation is zero Therefore zero should be entered for the Distance from axis of rotation parameter The weight of the core floor in pounds sho
29. ove though its width may not be required by RDEC for any other purpose In these latter circumstances you do not have to enter the width of the panel if you specify the weight of the panel directly and do not select either the ANSI Aluminum or ANSI Clad option Revision B 2011 11 22 Page 13 of 28 Parameters 3 wing and 4 wing doors with no core A 3 wing door with no core 4 wing door with no core D The overall diameter of the door Units can be feet inches meters centimeters or millimeters Wing Weight of an individual wing in pounds or kilograms ANSI Aluminum weight and ANSI Clad options can also be selected to determine weight Q Rotation rate of door in rpm revolutions per minute Note that in the cases of 3 wing and 4 wing doors without a core RDEC takes the width of a wing to be half the diameter of the door That is D 2 Consequently you do not have to enter the width of a wing and wing width is not requested by RDEC Co rotating ceiling point and extended objects are available optionally from the RDEC Configuration panel See beginning on page 21 for a discussion of these options Revision B 2011 11 22 Page 14 of 28 Parameters 3 wing and 4 wing doors with a core D 3 wing door with a core 4 wing door with a core D The overall diameter of the door Units can be feet inches meters centimeters or millimeters r The width of a radially directed wing Units can be feet inches meters
30. parameters if the window is not large enough to permit viewing of all parameters at once If Evaluate was selected prior to selecting Calculate the door rotation rate in rpm used by Calculate will be inherited from the value currently being used by Evaluate Evaluate Clicking on the Evaluate button on the other hand brings up a window detailing the kinetic energy of each specified component of the door and the rotation rate at which that component by itself would carry either 2 5 Ib ft or 7 0 Ib ft of kinetic energy The kinetic energies at the specified door rotation rate and the 2 5 and 7 0 Ib ft rotation rates of the entire combination of components are displayed in the summary at the bottom of the rightmost three columns By clicking on the check boxes in the Include column of the window and next to any Point objects or Extended objects individual components can be omitted from or included in the summary in any combination See the illustration below EjRevolving Door Energy Calculator 3 x 2 wing revolver with showcases Kinetic Energy pound feet RPM at 2 5 RPM at 7 0 Component Include at 3 6 RPM pound feet pound feet a No K Point objects Z flower pot 4 21 2 77 4 65 Vv Showcase floor Vv 7 08 2 14 3 58 Ceiling IV 9 77 1 82 3 05 T 1 1 Basic door Always 78 6 0 643 1 07 99 6 0 571 0 954 105 seconds per revolution 62 9 seconds per revolution r Set RPM for e
31. rtia of the core floor is IL 101 6 lb ft and this value should be entered for the Moment of inertia parameter Revision B 2011 11 22 Page 27 of 28 Epilogue If you have questions about the Revolving Door Energy Calculator that are not covered by this manual the FAQ Frequently Asked Questions file on the Davis Associates Inc website may be of help Please go to www davis inc com ke faq You can also report problems or submit comments questions or suggestions at the above address If you need an additional copy of the RDEC manual or want to check that you have the latest version of the manual please go to www davis inc com ke help manual Fare Davis Associates Inc e 43 Holden Road Newton MA U S A 02465 1909 Pee 617 244 1450 Revision B 2011 11 22 Page 28 of 28
32. s or millimeters Width of the first flat showcase panel Note that it is immaterial which of the two flat showcase panels is considered first and which is considered second Units can be feet inches meters centimeters or millimeters Width of the second flat showcase panel Note that it is immaterial which of the two flat showcase panels is considered first and which is considered second Units can be feet inches meters centimeters or millimeters Unless you want RDEC to compute the weight of each curved panel from the width of the panel and the formulae for the standard ANSI Aluminum or ANSI Clad materials you do not have to enter the width of a curved panel in the RDEC Dimensions panel Otherwise when required the units can be feet inches meters centimeters or millimeters The weight of a radially directed wing in pounds or kilograms ANSI Aluminum and ANSI Clad options can also be selected to determine weight Page 16 of 28 Parameters 2 wing door with showcases continued dl weight The weight of the first flat showcase panel in pounds or kilograms ANSI Aluminum and ANSI Clad options can also be selected to determine weight Note that it is immaterial which of the two flat showcase panels is considered first and which is considered second d2 weight The weight of the second flat showcase panel in pounds or kilograms ANSI Aluminum and ANSI Clad options can also be selected to determine weight Note that it is immater
33. the point object A maximum of eight point objects can be defined Weight 35 lb 4 Distance from axis of rotation 4 6 ft 4 On every wing V Name The name by which you want the point object to be designated This will already be filled in for you but you may change the filled in name Weight The weight of the point object in pounds or kilograms Distance The radial distance at which the named point object is located from the from axis axis of rotation of the door Units can be feet inches meters centimeters of or millimeters Must not exceed the larger of the door radius or if rotation specified the ceiling radius On every Check this box if a duplicate of the named point object is to be associated wing with every wing of the door Otherwise if only one instance of the point object is to be included leave this box unchecked Once you have hit Add in the Add a point object box the name of the point object will be added to the drop down list associated with the Name point objects box in the RDEC Dimensions panel The list can be viewed by clicking on the down arrow associated with the Name point objects box Names can be recalled from the list by clicking on the desired name in the drop down list The name currently appearing in the box can be deleted from the list by clicking on the trash can to the right of the box To add a new point object highlight and delete with the lt Delete gt key or otherwise change the
34. trative diagram not drawn to scale Results Comments typed here will be saved with file Curved panel weight I bb al mi Showcase floor weight y lb 4 W Ceiling weight Ib 4 mi Explanation Illustration of a 2 wing revolving door with showcases Note that the relative position of attachment of the curved panels to the two flat panels of the respective showcase is immaterial and has no effect on the energy calculation results Care must be taken that the diameter D is the distance between the curved panels and not for example the inside diameter of the cylinder within which the door rotates All Configuration items must be completed before all Dimension items can be seen RPM 3 7 al cai Quit Choose the door type from the Configuration panel at the upper left of the RDEC display by selecting the Number of wings and whether other components are to be included such as a co rotating ceiling and showcase floors Illustrated is the selection of a 2 wing door with showcases with co rotating ceiling and showcase floors to be added to the basic door Selections are made by clicking on the down arrows which open drop down lists of the possible alternatives for each component of the door As the specific components of the door configuration are selected you will notice that data entry boxes appear within the Dimensions and Weights panels as required It is through these data entries that the
35. uld be entered for the Weight parameter Finally the moment of inertia about its own center of mass of a 3 sided regular polygonal equilateral triangle floor is 1 I Wd 4 1 If the radial distance to the center of mass of an extended object is in fact zero as here the rotational point or center of mass kinetic energy of the object is unaffected by the Weight parameter and depends rather only on the self moment of inertia and the rotation rate of the door 2 For a derivation of this equation as well as for a 4 sided and n sided core floors see Appendix 4 of Derivation of the Kinetic Energy Equations used by the Revolving Door Energy Calculator RDEC Program available on the Davis Associates Inc website Revision B 2011 11 22 Page 26 of 28 Parameters Extended objects continued where if using English units W is the weight of the floor in pounds d is the distance from the geometric center of the floor axis of rotation to any vertex of the polygonal floor in feet and J is the moment of inertia in units of pound feet See also the highlighted text on page 25 As can be easily concluded from the Figures at the top of page 15 the distance from the geometric center of the core floor to a vertex is d 2a r 2 so that the moment of inertia is 2 e 4 2 If the weight W of the core floor is 65 pounds the overall door diameter D is 12 feet and the width r of a radial panel is 3 5 feet then the moment of ine
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