Bracing Systems Bracing Systems 1 1
Rod Bracing Rod Bracing 2 2
Wind Bracing Systems Wind Bracing Systems HOW BRACING WORKS 3 3
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal The WIND load on Endwall panels... 4 4
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal is dispersed through Endwall framing... 5 5
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal into the Continuous Purlin system. 6 6
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal The Purlins transfer the load... 7 7
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal into the roof Brace Rods. 8 8
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal The load travels through the Roof bracing... 9 9
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal through the Eave Purlin ... 10 10
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal to the wall Diagonal Bracing ... 11 11
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal ...(or auxiliary bracing)... 12 12
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal into the Building’s foundation. 13 13
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Load Dispersal into the Building’s foundation. 14 14
Transverse (Perpendicular Transverse (Perpendicular to Sidewall) to Sidewall) 15 15
Longitudinal (Perpendicular Longitudinal (Perpendicular to Endwall) to Endwall) 16 16
Standard EP Location Standard EP Location 17 17
Roof Rods Break at Endpost(s) Roof Rods Break at Endpost(s) 18 18
Wind Bracing Wind Bracing If possible, keep endpost spacing If possible, keep endpost spacing similar similar at each endwall for a more at each endwall for a more efficient bracing pattern. efficient bracing pattern. 19 19
Typical Rod Bracing Location Typical Rod Bracing Location 20 20
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Standard Standard Bracing Bracing Methods Methods 21 21
Diagonal Bracing Diagonal Bracing Diagonal Bracing Diagonal Bracing • • VP standard bracing utilizes Diagonal VP standard bracing utilizes Diagonal Bracing in the Roof and Walls. Bracing in the Roof and Walls. • • The bracing design is determined by: The bracing design is determined by: � � Building Loads & Code Building Loads & Code � � Building Size Building Size � � Building Location Building Location 22 22
Diagonal Rod Bracing Diagonal Rod Bracing Diagonal Rod Bracing Diagonal Rod Bracing Notes about Diagonal Rod Bracing: • • Stiffest bracing system available Stiffest bracing system available • • Most economical bracing system Most economical bracing system Eave Floor 23 23
Diagonal Rods Diagonal Rods 24 24
Diagonal Rods Diagonal Rods 25 25
Diagonal Bracing Options Diagonal Bracing Options Diagonal Bracing Options Diagonal Bracing Options (Rods) (Rods) (Rods) (Rods) Eave Floor 26 26
Alternate Diagonal Bracing Alternate Diagonal Bracing 27 27
Rod Brace Assembly Rod Brace Assembly 28 28
Coupling Nuts Coupling Nuts 29 29
Angle Bracing Angle Bracing � Bracing may be single rods or Bracing may be single rods or � angles depending upon angles depending upon loading/design loading/design 30 30
Angle Bracing Angle Bracing 31 31
Angle Bracing Angle Bracing 32 32
Angle Bracing Angle Bracing 33 33
Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Wind Bracing Systems Alternative Alternative Bracing Bracing Methods Methods 34 34
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Torsional Bracing Torsional Bracing Rods are omitted from one sidewall. 35 35
Torsional Bracing Torsional Bracing 36 36
No Torsional Allowed if… No Torsional Allowed if… 37 37
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Notes About Torsional Bracing • Inexpensive • Inexpensive • • Maximum building width of 50’ Maximum building width of 50’ • • Maximum eave height of 18’ Maximum eave height of 18’ • 100 mph maximum wind speed • 100 mph maximum wind speed • • Minimum 3 bays Minimum 3 bays • • Call your Service Center if Call your Service Center if close close to these to these parameters parameters 38 38
Rod Brace to Floor Rod Brace to Floor 39 39
Rod Mark Numbers Rod Mark Numbers 40 40
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Portal Bracing Portal Brace Includes: • Portal Beam • Portal Beam • • Knee Braces Knee Braces • • Additional column Additional column support support 41 41
Portal Bracing Portal Bracing 42 42
Portal Bracing Portal Bracing 43 43
Bracing Bracing- -Wind Posts Wind Posts Bracing Bracing New Bracing Option New Bracing Option Fixed Base Wind Post (with Fixed Base Wind Post (with • • automated Wind Post Base automated Wind Post Base Plate Design) Plate Design) Use at sidewalls or endwalls Use at sidewalls or endwalls • • 35’ 35’- -0” max. eave height 0” max. eave height • • Max. 24” column depth Max. 24” column depth • • Connection at main frame is Connection at main frame is • • similar to that of portal frame similar to that of portal frame 44 44 44
Post and Beam Stability Post and Beam Stability � Automated diaphragm check Automated diaphragm check � � If fails Rods may automatically be If fails Rods may automatically be � designed designed � Initially at interior bay Initially at interior bay � � Then at Then at endbay endbay � 45 45
Post and Beam Stability Post and Beam Stability 46 46
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Notes About Portal Bracing • More expensive than rod • More expensive than rod • • Flexible, not as stiff as diagonal Flexible, not as stiff as diagonal bracing bracing • • Maximum eave height of 20’ Maximum eave height of 20’ • • Special clearances possible Special clearances possible 47 47
Portal Bracing Portal Bracing 48 48
Portal Bracing Portal Bracing 49 49
Portal Bracing??? Portal Bracing??? 50 50
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Portal Frames Portal Frame Includes: • Portal Frame Beam • Portal Frame Beam • • Portal Frame Columns Portal Frame Columns • Load Transfer Clips • Load Transfer Clips • • Bolts and Nuts Bolts and Nuts 51 51
Portal Frame Portal Frame 52 52
Portal Frame (1/ 2” offset) Portal Frame (1/ 2” offset) 53 53
Portal Frame Portal Frame 54 54
Portal Frame Portal Frame 55 55
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Notes About Portal Frames • • More expensive than rods More expensive than rods • • Relatively stiff (can hold drift on frame) Relatively stiff (can hold drift on frame) • • Special clearances possible Special clearances possible (Hold column & rafter depths) (Hold column & rafter depths) 56 56
Portal Frame 57 57
Portal Frame Portal Frame (typical Anchor Rod Detail) (typical Anchor Rod Detail) 58 58
Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Alternative Bracing Methods Eave Floor Combination of Rods and Portal Frame • • May be more for building heights May be more for building heights above 20’ tall. above 20’ tall. 59 59
Partial Height Portal Frame Partial Height Portal Frame 60 60
Bracing Comparisons Bracing Comparisons (Building Size = 200 x 300 x 19, I BC, 85 MPH (Building Size = 200 x 300 x 19, I BC, 85 MPH Wind Wind - - Book Price Shown) Book Price Shown) $8,000 $7,000 $6,000 $5,000 Rods $4,000 Portal Brace $3,000 Portal Frame $2,000 $1,000 $0 Bracing Type 61 61
Strut Bracing at Wall Strut Bracing at Wall 62 62
Tube Strut Tube Strut 63 63
Rod Bracing at Truss Frame Rod Bracing at Truss Frame 64 64
Rod Bracing at Truss Frame Rod Bracing at Truss Frame 65 65
Rod Bracing at Facade Rod Bracing at Facade 66 66
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