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DATE: 11/03/15 JOB ORDER#: 15-3341
CLIENT: All Area Roofing
ADDRESS: 3921 S.US Highway 1 Fort Pierce,Florida 34982
PROJECT: Farrington Residence Flat Wood Roof Deck
ADDRESS: 190 S.E. Celestia Court Port Saint Lucie,FL 34983
FBC 2014/ASCE 7-10 DESIGN PRESSURE CALCULATIONS
Proiect Information:
Height= 9' Exposure: C Basic/Ultimate Wind Speed: Vilt=170 mph
Length= 5 P Category: II Nominal Wind Speed: Vasd=Vu1t*0.6
Width= 37' Slope: <7° (asd=allowable strength design)
Parapet Wall: <3' Residential K7=0.85, Kzt= 1.0, Kd=0.85
Design Calculations:
Velocity Pressure: q=0.00256*KXK tKdV2
Velocity Pressure (ult): q=0.00256(0.85)(1.0)(0.85)(170)2] =53.45 psf
Velocity Pressure (asd): q=0.00256(0.85)(1.0)(0.85)(170*y6.6)2] =32.07 psf
Width of Pressure Coefficient: 0.1(37') = 3.7'
0.4(9') = 3.6' } use: 4'0"
Effective Wind Area: <10ft2
For parapet height three feet(3') or larger, zone three (3) shall be treated as zone two (2).
External Pressure Coefficient: Internal Pressure Coefficient:
1) GCP1 = -1.0 1) GCPi = 0.18
2) GCP2 = -1.8
3) GCP3 = -2.8
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Page Z, 11/03/15,Job Order#15-3341
All Area Roofing "
Farrington Residence-FIat Wood Roof Deck F11,01VIPA
190 S.E.Celestia Court;Port Saint Lucie,FL 34983:
Design Pressures Based on Vasd:
1) Field PI = 32.07*[(-l.0)–(0.18)1 =-37.8 psf
2) Perimeter P2 = 32.07*[(-1.8)–(0.18)1 =-63.5 psf
3) Corners P3 = 32.07*[(-2.8)–(0.18)1 =-95.6 psf
Attachment Requirements Per RAS-117:
Based on the requirements of N.O.A. #14-0224.03, System Type E(1),pg 12 of 16,with a
maximum design pressure of -52.5psf; the following are our recommended fastening
patterns to attach the proposed base sheet to the wood (non-insulated) deck utilizing
approved I 1 ga. annular ring shank nails and approved tin caps:
Field: 8" o.c. a)4" laps and 3 staggered rows 8" o.c.
Perimeter: 8" o.c. @a 4" laps and 4 staggered rows 8" o.c.
Corners: 6" o.c. @u 4" laps and 5 staggered rows 6" o.c.
Notes: Corners and perimeter area dimension shall not be less than a=4'0"
Contractor to verify that the fastening patterns meet manufacturer's
requirements for issuance of a warranty(as applicable).
All work shall be in compliance with the local building code product
control notice of acceptance and manufacturer specifications and Florida
Building Code 2014 Edition.
Wind load calculations based on ASCE 7-10, FBC 2014 and information
provided by client. Client is responsible for verifying existing conditions
as it pertains to the above provided product approval.
All work shall be inspected by our field engineer (or authorized
representative) or a building department inspector to verify compliance
with specifications.
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Florida Engineering'8i Testing, Inc.
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Florid'a`Reg. No48202
Certificate of Authorization No. 6923