HomeMy WebLinkAbout2 LONGITUDINAL EQ CALC - 23-00006 - Hibbard Elemenatry - Fire Sprinkler1
Seismic Brace Report
Project Name HIBBARD ELEMENTARY
Date 12/22/2022
Address 2413 N 3000 W
REXBURG, ID 83440
APPROVAL STAMP
Approved
Approved as Noted
Not Approved
Remarks:
Standard NFPA 13-2019
BRACE SUMMARY
Brace Name Drawing Reference Seismic Design
Load Structure Brace Description Fastener Attachments
LONGITUDINAL FP2 140 lbf.Wood - SG = 0.35 Longitudinal Orientation D, E, & F 30°
- 90° 1 NPS Sch 40
1/2" Lag Screw per
NFPA 13
AF700 - 1/2"
AF730 - 2 NPS
NOTE: Per NFPA 13-2019, all load capacities listed for fasteners installed in cracked concrete have been reduced based on the prying factors listed for ASC's swivel
attachments. Prying factors for NFPA fastener orientations “A” through “I” may be found in ASC's individual product submittal at asc-es.com
NFPA 13-2016 Product loads incorporate a minimum safety factor of 1.5. NFPA 13-2019 FM Product loads have been reduced to include a safety factor of 2.2 unless
noted in the applicable product submittal.
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LONGITUDINAL - SEISMIC BRACE CALCULATIONS
Seismic Project HIBBARD ELEMENTARY
Standard NFPA 13-2019
Brace Type Longitudinal
Brace Name LONGITUDINAL
Drawing Reference FP2
Approval Agency UL Listed
STRUCTURE INFORMATION
Structure Wood
Substrate Wood - SG = 0.35
BRACE INFORMATION
Brace Member 1 NPS Sch 40
Brace Length Max 10 ft 6 in
Brace Angle 30° - 90°
Least Radius of Gyration 0.421 in.
l/r Ratio Max 300
Max Horizontal Load 412 lbf.
FASTENER INFORMATION
Fastener Name Lag Screw per NFPA 13
Fastener Orientation D, E, & F
Fastener Diameter 1/2 in.
Nominal Embedment 4 1/2 in.
Max Horizontal Load 315 lbf.
SEISMIC BRACE ATTACHMENTS
Model Size Load Rating
Swivel Att.AF700 1/2"942 lbf.
Pipe Att.AF730 2 NPS 375 lbf.
See Appendix A for alternate seismic brace attachments.
All seismic brace attachments manufactured by ASC Engineered Solutions.
Net Vertical Reaction Forces do not need to be addressed per NFPA 13-2019.
SPRINKLER SYSTEM LOAD CALCULATION (FPW = CP*WP)
CP = 0.359
Qty Line Description Pipe Diameter/Type Length Weight per ft Weight
1 Main Braced Pipe 2 NPS Steel Sch 10 80.00 ft.4.22 lb/ft.337.60 lb.
Total System Weight 337.60 lb.
System Design Weight (Wp)389.00 lb.
Horizontal Seismic Load (Fpw)140 lbf.
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Appendix A - Alternate Seismic Brace Attachments
LONGITUDINAL
Fastener Capacity Nom. Embedment Min. Edge 1|2 Swivel Pipe Attachment
Lag Screw per NFPA 13 320 lbf.5 1/2 in.-- | --AF700 1/2" | 942 lbf.--
Lag Screw per NFPA 13 325 lbf.6 1/2 in.-- | --AF700 1/2" | 942 lbf.--
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Appendix B - Enlarged Images
LONGITUDINAL
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Appendix C - Cp Calculations
BRACE CALCULATION DATA
Brace Name Brace Ref Method Cp Ss Site Fa SDS Z H
LONGITUDINAL FP2 A 0.359 0.350 ----------
CALCULATION METHODS
A Cp calculated per NFPA 13-2019 Table 18.5.9.3
B Cp entered by user
C Cp calculated per ASCE/SEI 7-16 per NFPA 13-2019 Section 18.5.9.4
Per NFPA 13-2019, the following values are always assumed for ap, Rp, and Ip:
ap Rp Ip
2.5 4.5 1.5
LEGEND
Fpw Seismic Horizontal Design Force
Cp Seismic Coefficient per NFPA
Ss Short Period MCEr Spectral Response Acceleration
Fa Site Coefficient. See Tables Below.
SDS Short Period Spectral Acceleration
ap Component Amplification Factor. Taken as 2.5 for Fire Sprinkler Applications
Rp Component Response Modification Factor. Taken as 4.5 for Fire Sprinkler
Applications
Ip Component Importance Factor. Taken as 1.5 for Fire Sprinkler Applications
Wp Component Operating Weight. Taken as the weight of the Fire Sprinkler System in
the ZOI plus 15%
z Height in the structure where the component attaches to the structure. Height is
relative to the base of the structure and shall not be taken as less than 0 and shall
not be larger than “H”.
h Average roof height of the structure relative to the base
EQUATIONS
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SITE COEFFICIENT, FA PER ASCE/SEI 7-16
Ss ≤ 0.25 Ss = 0.5 Ss = 0.75 Ss = 1 Ss = 1.25 Ss ≥ 1.5
A 0.8 0.8 0.8 0.8 0.8 0.8
B 0.9 0.9 0.9 0.9 0.9 0.9
C 1.3 1.3 1.2 1.2 1.2 1.2
D 1.6 1.4 1.2 1.1 1 1
E 2.4 1.7 1.3 1.2 1.2 1.2
Use straight-line interpolation for intermediate values of Ss.
SITE CLASSIFICATION PER ASCE/SEI 7-16
Site Class Ground Structure
A Hard Rock
B Rock
C Very Dense Soil and Soft Rock
D Stiff Soil
E Soft Clay Soil
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Appendix D - Bill of Materials
Project Name HIBBARD ELEMENTARY
Code Requirements NFPA 13-2019
Last Updated December 22, 2022
QUANTITY FIGURE NUMBER PRODUCT DESCRIPTION
1/2" Lag Screw per NFPA 13 Fastener
AF700 1/2" AF700 Universal Swivel Attachment AF700 - 1/2"
AF730 2 NPS AF730 Longitudinal & Lateral Seismic Clamp AF730 - 2 NPS