HomeMy WebLinkAboutAPPROVED ENGINEERING
DATE: 3/26/21 Order No.: 21R0219
CLIENT: Atlas Roofing
ADDRESS: 851 South Deerfield Avenue; Deerfield Beach, FL 33441
PROJECT: 8000 South U.S. Hwy 1 Flat Concrete Deck
ADDRESS: 8000 South U.S. Hwy 1; Port St Lucie, FL 34952
ASCE 7-16 DESIGN PRESSURE CALCULATIONS
In Accordance with Chapter 30, Part I
Project Information: Flat Concrete Deck
Height = 40' Exposure: C Ultimate Windspeed: Vult= 170 mph
Length = 80' Category: II Basic Windspeed: Vasd = 132 mph
Width = 75' Slope: < 7 Kz = 1.04 Kd = 0.85
Parapet Wall: < 3'
Design Calculations:
Velocity Pressure: q = 0.00256*[(1.04)(0.85)(1.00)(1.00)(132)2]
= 39.4 psf
Width of Pressure Coefficient Zone 1 and 2 0.6(40') = 24.0'
Length of Pressure Coefficient Zone 3 0.6(40') = 24.0'
Width of Pressure Coefficient Zone 3 0.2(40') = 8.0'
Effective Wind Tributary Area: <10ft2
For parapet height three feet (3') or larger, zone three (3) can be treated as zone two (2) (ASCE 7-16).
External Pressure Coefficient: Internal Pressure Coefficient:
1') GCP1' = -0.9 1) GCPi = 0.18
1) GCP1 = -1.7
2) GCP3 = -2.3
3) GCP3 = -3.2
Design Pressures:
Zone 1' P1' = 39.4*(-0.9 - 0.18) = -42.6 psf
Zone 1 P1 = 39.4*(-1.7 - 0.18) = -74.1 psf
Zone 2 P2 = 39.4*(-2.3 - 0.18) = -97.8 psf
Zone 3 P3 = 39.4*(-3.2 - 0.18) = -133.3 psf
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3/26/21
8000 South US 1
Port St. Lucie, FL
Attachment Requirements:
Based on RAS-117 and N.O.A. #20-0723.27; with a design pressure of -635 psf; the referenced system is
approved with base sheet adhered to the primed concrete deck with approved mopping asphalt applied
withing the EVT range and at a rate of 20-40 lbs./sq. Ply sheet adhered to base sheet with approved mopping
asphalt applied withing the EVT range and at a rate of 20-40 lbs./sq. Membrane adhered to ply sheet with
approved mopping asphalt applied withing the EVT range and at a rate of 20-40 lbs./sq.
Notes: All work shall be in compliance with the local building code product control notice of
acceptance and manufacturer specifications and the Florida Building Code 2020 edition.
Wind load calculations based on ASCE 7-16 and information provided by client.
All work shall be inspected by our field engineer or city inspector to verify compliance
with specifications.