Seismic Bracing Systems

Seismic Bracing Systems-Free PDF

  • Date:21 Mar 2020
  • Views:31
  • Downloads:0
  • Pages:52
  • Size:1.95 MB

Share Pdf : Seismic Bracing Systems

Download and Preview : Seismic Bracing Systems


Report CopyRight/DMCA Form For : Seismic Bracing Systems


Transcription:

SEISMIC MAP CONVERSION CHARTS,CONVERSION OF UNIFIED UNITS OF MEASURE. INTO METRIC EQUIVALENTS,To Convert From Into Multiply By. Inches In Millimeter 25 4 exactly,Feet Ft Centimeters cm 30 48 exactly. Square inches In2 Square centimeters cm2 6 4516 exactly. Cubic inches In3 Cubic centimeters cm3 16 3871,Pounds advp Lb Kilograms kg 45359237 exactly. Pounds per square inch Kilograms per square 00070307. Millimeter kgf mm2,Foot pounds Ft Lbs Meter kilograms m kg 138255.
Pounds force Lbf Kilonewton kN 004448,Pounds force Lbf Newton N 4 448222. Copyright 2002 Tyco Flow Control All Rights Reserved. TABLE OF CONTENTS,General Information 1 1,Design Procedures for Trapeze Hangers 2 1. Design Procedures for Single Pipe Hangers 2 5,Trapeze Bracing 3 1. Trapeze Fittings 3 3,Single Pipe Bracing 3 5,Horizontal Bracing 3 11. Vertical Bracing 3 13,Structure Attachments 4 1,Anchor Load Tables 5 1.
Test Procedures for Anchors 5 3,Typical Attachments 6 1. Concrete Inserts 6 2,Channel Styles 6 3,Channel Load Tables 6 6. Channel Nuts and Hardware 6 7,Channel Fittings 6 8. Design Examples 7 1,GENERAL INFORMATION, 1 These guidelines are intended to provide information for the seismic restraint of nonstructural components. in buildings based on the California Code of Regulations CCR Part 2 Title 24 Nonstructural components. may include hospital piping electrical conduit cable trays and air handling ducts. 2 Seismic horizontal force factor Zp ZIC pWp,Z 4 for seismic zone 4.
Wp Weight of Component, 3 When supporting pressure piping spacing of seismic bracing should not exceed two 2 times the vertical. support spacing Stress in the pipes that are comparable to those required by ASME B31 1 1986 will be. maintained, 4 The CCR Part 2 Title 24 Table 23 P Footnote 12 states the following. Seismic restraints may be omitted from the following installations. a Gas piping less than one 1 inch inside diameter, b Piping in boiler and mechanical equipment rooms less than 1 25 inches inside diameter. c All piping less than 2 5 inches inside diameter, d All piping suspended by individual hangers twelve 12 inches or less in length from the top of pipe to. the bottom of the support for the hanger, e All electrical conduit less than 2 5 inches inside diameter.
f All rectangular air handling ducts less than six 6 square feet in cross sectional area. g All round air handling ducts less than 28 inches in diameter. h All ducts suspended by hangers 12 inches or less in length from the top of the duct to the bottom of the. support for the hanger, 5 Unistrut nuts and bolts mounted to the Unistrut channels shall be tightened to the following minimum. Bolt Diameter In Bolt Torque Ft Lbs Bolt Diameter In Bolt Torque Ft Lbs. 16 11 8 100,8 19 4 125, 6 The charts and information presented on the following pages are intended as a guide only Prior to. installation the user and or project engineer shall determine structural adequacy of supports and the. supporting structure and shall also determine compliance with applicable codes. Use of this manual requires that layout drawings for the pipe duct conduit be used to determine brace. locations sizes anchorage and forces These drawings are an integral part of the approval of the lateral. force bracing system The layout drawings shall be submitted to OSHPD as a deferred approval item prior. to the installation of the lateral bracing system,R E N E W E D. Fixed Equipment Anchorage, Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184.
Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. DESIGN PROCEDURES FOR TRAPEZE HANGERS, 1 Determine the support spacing using the smallest pipe diameter. 2 Calculate the total weight of the pipes plus contents W on each trapeze using the following equation. W S x p1 p 2 p3 pn,W Total weight on trapeze Ibs, pn Weight of pipe plus water lbs ft page 2 1 table 1. S Support spacing ft page 2 1 table 1, 3 Select clamps pages 3 3 3 4 tables 6 7 Either style P1100 Series or P2558 Series can be used.
Maximum pipe support spacing should be as per chart 1 row 3 page 3 12. 4 Select trapeze member using the total weight on the trapeze and the length of trapeze required to fit the. given pipe sizes and quantities page 3 1 3 2 tables 2 5. 5 Calculate horizontal seismic force Fh assuming braces on alternate trapeze supports page 2 2 figure 1. Select a brace assembly page 3 11 details I V that has an Fh value that meets or exceeds the horizontal. seismic force, If necessary seismic force can be recalculated with braces on every trapeze see figure 2. Data for Schedule 40 Standard Weight Pipe,Including Horizontal Seismic Force of 50 G. Pipe Max Support Weight Of Horizontal Seismic, Pipe Section Spacing Per Pipe Plus Force Ft of Pipe. Size Modulus ASME B31 1 Water 5 x Pipe Wt Ft,In In S Feet P Lbs Ft Lbs Ft. 2 0 041 7 0 98 0 49,4 0 071 7 1 36 0 68,1 0 133 7 2 05 1 03.
11 2 0 326 9 3 60 1 80,2 0 561 10 5 11 2 55,21 2 1 060 11 7 87 3 94. 3 1 720 12 10 78 5 39,4 3 210 12 16 31 8 16,6 8 500 12 31 51 15 76. 8 16 800 12 50 29 25 15, ASME B31 1 does not list all sizes shown therefore some sizes have been proportioned between. Spacing limited by CBC 1998, For gas pipe and copper pipe see CBC 1998 for support spacing. R E N E W E D,Fixed Equipment Anchorage, Office of Statewide Health Planning and Development.
35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184. Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. DESIGN PROCEDURES FOR TRAPEZE HANGERS,W GRAVITY LOAD PER TRAPEZE. FH 5W x 2 W,ROD TENSION MAX 5W W 1 5W,ROD COMPRESSION MAX 5W.
BRACE ON ALTERNATE HANGERS, NOTE FOR LOAD REACTIONS SHOWN ON THIS W GRAVITY LOAD PER TRAPEZE. PAGE THE PIPE OR CONDUIT LOADS ON FH 5W, THE TRAPEZE SHOULD BE RELATIVELY ROD TENSION MAX 5W 5W 1 0W. UNIFORM AND SYMMETRICAL ALONG THE ROD COMPRESSION MAX 0. LENGTH OF THE MEMBER,BRACE ON EVERY HANGER,R E N E W E D. Fixed Equipment Anchorage, Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184.
Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. DESIGN PROCEDURES FOR TRAPEZE HANGERS, 6 Check compression and tension in the rod When diagonal braces are used to stabilize trapeze hangers. they will cause tension and compression forces to be added to the tension already in the rod see figure 3. a Select threaded rod that has a tension strength that meets or exceeds the required tension. page 3 14 table 10, Brace on alternate hangers Tmax 1 5W page 2 2 figure 1. Brace on every hanger Tmax 1 0W page 2 2 figure 2, b Check compression in the selected threaded rod When braces are used on every trapeze no stiffener.
is required If the rod is subject to compression it may require a stiffener Determine the percentage of. full stress capacity on the rod using the following equation. Actual Compression Load Allowable Compression Load page 3 13 table 9. Select clip spacing L based on percentage above page 3 13 table 9. 7 Determine if longitudinal braces are required using the following equation. Brace Spacing Allowable Fh 25W, Allowable Fh Determined by assembly selected page 3 11 details I V. 8 Check forces on pipe clamps using following equations. Vertical Force Pipe Wt per foot x Trapeze spacing, Transverse Force Pipe Wt per foot x Lateral Brace Spacing x 0 5. Longitudinal Force Pipe Wt per foot x Longitudinal Brace Spacing x 0 5. See pages 3 3 and 3 4 for allowable design forces Revise spacing of braces if necessary. 9 Check trapeze member for combined vertical and lateral seismic loads using the following interaction. equation Revise trapeze spacing or brace if necessary. Vertical Force,Horizontal Force 1 33,Reduction Factor x Allowable. Verticall Force Lateral,Reduction Factor x Allowable. Horizontal Force, 10 Select concrete anchors if they are used See pages 5 1 and 5 2 check tension and shear interactions as.
per ICBO reports,R E N E W E D,Fixed Equipment Anchorage. Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184. Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. DESIGN PROCEDURES FOR TRAPEZE HANGERS,MAX ROD TENSION W 2 W 1 5W.
MAX ROD COMP W 2 W 5W,R E N E W E D,Fixed Equipment Anchorage. Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184. Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. DESIGN PROCEDURES FOR SINGLE PIPE HANGERS, 1 Select hanger type pages 3 6 through 3 10 given the diameter of the pipe.
2 Determine the support spacing page 2 1 table 1 and corresponding rod diameter. page 3 12 chart 1 row 2 Calculate the total weight of the pipe and contents page 3 12 chart 1 row 6. or use the following equation,W Total weight on hanger Ibs. p Weight of pipe plus water Ibs ft,S Support spacing ft. 3 Select a brace assembly page 3 11 details I V with an allowable Fh greater than the applicable Fh. page 3 12 chart 1 row 7 or the following equation,Brace alternating Hangers Fh 5Wx2 W. Brace every Hanger Fh 5W, 4 Check maximum tension of rod page 3 12 chart 1 row 8. 5 Compression see page 2 3 step 6b, 6 Determine if longitudinal braces are required using the following equation.
Brace Spacing Allowable Fh 0 5W, Allowable Fh determined by assembly selected page 3 11 details I V and clamp allowable force in the. longitudinal direction page 3 7, 7 Select concrete anchors if they are used See pages 5 1 and 5 2 check tension and shear interactions as. per ICBO reports,R E N E W E D,Fixed Equipment Anchorage. Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184. Valid for 3 Years Maximum,William Merkel PH 800 521 7730.
Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. DESIGN PROCEDURES FOR SINGLE PIPE HANGERS,TRANSVERSE BRACE. LONGITUDINAL BRACE,R E N E W E D,Fixed Equipment Anchorage. Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184. Valid for 3 Years Maximum,William Merkel PH 800 521 7730.
Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. TRAPEZE BRACING Single Channel Style, Table 2 P1000 Trapeze Load Data Table 3 P5500 Trapeze Load Data. Maximum Uniform Concentrated Load Maximum Uniform Concentrated Load. Span Design Load Center of Span Span Design Load Center of Span. In mm Lbs N Lbs N In mm Lbs N Lbs N, 24 610 1 690 7 520 450 2 000 24 610 3 280 14 590 1 620 7 210. 36 914 1 130 5 030 560 2 490 36 914 2 190 9 740 1 080 4 800. 48 1 219 850 3 780 420 1 870 48 1 219 1 640 7 300 810 3 600. 60 1 524 680 3 020 340 1 510 60 1 524 1 310 5 830 656 2 920. 72 1 829 560 2 490 280 1 250 72 1 829 1 090 4 850 540 2 400. 84 2 134 480 2 140 240 1 070 84 2 134 940 4 180 460 2 050. 96 2 438 420 1 870 210 930 96 2 438 820 3 650 400 1 780. 108 2 743 380 1 690 190 850 108 2 743 730 3 250 360 1 600. 120 3 048 340 1 510 170 760 120 3 048 660 2 940 320 1 420. R E N E W E D,Fixed Equipment Anchorage, Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184.
Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. TRAPEZE BRACING Double Channel Style,SEE TABLE 16 PAGE 6 6 FOR. COMPLETE TRAPEZE LOAD INFORMATION, Table 4 P1001 AW Trapeze Load Data Table 5 P5501 AW Trapeze Load Data. Maximum Uniform Concentrated Load Maximum Uniform Concentrated Load. Span Design Load Center of Span Span Design Load Center of Span. In mm Lbs N Lbs N In mm Lbs N Lbs N, 48 1 219 2 400 10 680 1 190 5 290 48 1 219 4 680 20 820 2 390 10 630.
60 1 524 1 920 8 540 950 4 230 60 1 524 3 870 17 210 1 920 8 540. 72 1 829 1 600 7 120 790 3 510 72 1 829 3 220 14 320 1 990 8 850. 84 2 134 1 370 6 090 680 3 020 84 2 134 2 760 12 280 1 360 6 050. 96 2 438 1 200 5 340 590 2 620 96 2 438 2 420 10 760 1 190 5 290. 108 2 743 1 070 4 760 530 2 360 108 2 743 2 150 9 560 1 160 5 160. 120 3 048 960 4 270 470 2 090 120 3 048 1 930 8 590 950 4 230. R E N E W E D,Fixed Equipment Anchorage, Office of Statewide Health Planning and Development. 35660 Clinton Street,R 0120 February 1 2002 Wayne Michigan 48184. Valid for 3 Years Maximum,William Merkel PH 800 521 7730. Structural Engineer FAX 734 721 4106,Bill Staehlin 916 324 9106. TRAPEZE FITTINGS Pipe Clamps P1100 Series,Table 6 P1100 Series Pipe Clamps.
Design Loads,Unistrut Strap Vertical Transverse Longitudinal. Part Pipe Size thickness Screw Size Force Force Force. Number In mm Ga mm In mm Lbs N Lbs N Lbs N,P1111 2 13 16 1 5 4 6 400 1 780 70 310 50 220. P1112 4 19 14 1 9 4 6 600 2 670 100 440 70 310,P1113 1. Brace on alternate hangers Tmax 1 5W page 2 2 figure 1 Brace on every hanger Tmax 1 0W page 2 2 figure 2 b Check compression in the selected threaded rod When braces are used on every trapeze no stiffener is required If the rod is subject to compression it may require a stiffener Determine the percentage of

Related Books