HomeMy WebLinkAboutENGINEERING LETTERENGINEERING & TESTING, INC.
Phone: (866) 781-6889 •Fax: (866) 784-8550
www.floridaengineeringandtestin.g.com
250 S.W.13th Avenue
SCANNED _ -- — Pompano Beach, FL 33069
BY
DATE: 4/1/19 St. Lucie CoUlltyJOB ORDER #: 19-1605
CLIENT: All Area Roofing
ADDRESS: 3921 S. US Highway 1 Fort Pierce, Florida 34982
PROJECT: Leonis Residence 5V Crimp 26 Ga. Steel Roof Panels
ADDRESS: 1835 Golden Ponds Drive Fort Pierce, FL 34945
2017 FBC/ASCE-7 DESIGN PRESSURE CALCULATIONS
Proiect Information:
Mean Height = Max. 15' Exposure: C Basic/Ultimate Wind Speed: V it=170 mph
Length = 52' Category: H Nominal Wind Speed: Vasd=V it*40.6
Width = 25' Slope: 3/12 =14' (asd = allowable strength design)
Parapet Wall: N/A Residential Kz = 0.85, Kzt = 1.0, Kd = 0.85
Design Calculations:
Velocity Pressure: q = 0.00256*Kj<ztKdV2
Velocity Pressure (it): 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*40.6)2] = 32.07 psf
Width of Pressure Coefficient: 0.1(25')
0.4(15')
Effective Wind Area: <10ft2
External Pressure Coefficient:
1)
GCP1
= -0.9
2)
GCP2
= -1.7
3)
GCP3
= -2.6
Design Pressures Based on Vasd:
= 2.5'
= 6.0' ) use: 3'0"
Internal Pressure Coefficient:
1) GCPi = 0.18
1)
Field
Pl =
32.07*[(-0.9) — (0.18)] = -34.6 psf
2)
Perimeter
P2 =
32.07* [(- 1.7) — (0.18)] = -60.3 psf
3)
Corners
P3 =
32.07*[(-2.6) — (0.18)] = -89.2 psf
rig
IV Q
Quality A, ✓Lssurance
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Page 2, 4/1//19, Job Orde',. _J-1605
All Area Roofing
Leonis Residence - 5V Crimp 26 Ga. Steel Roof Panels
1835 Golden Ponds Drive; Fort Pierce, Florida:
Attacbment Requirements:
Based on the requirements of Florida Product Approval # 11651.12R3 with maximum
design pressures of-108.5psf and-156.5psf; the following are our recommended
fastening patterns to attach the 24" wide 5V Crimp 26 ga. Steel Roof Panels to the
minimum 15/32" thick plywood or wood deck with # 9-15 X 1-1/2" Hex -Washer Head
wood screws to penetrate 1/4" min. thru deck (or sufficient length to meet requirements):
Fastener Pattern at Panel Ribs; 12"o.c. in all roof zones acceptable per approved
Florida Product Approval provided.
Notes: Corners and perimeter (edge, hip, & ridge) area dimension shall not be less
than a = 3'0" (Zone 2: Perimeter (including along ridges) is a 3'0" wide
strip, Zone 3: Corners are 3'0" x 3'011)
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 2017 Edition.
Wind load calculations based on ASCE-7, 2017 FBC, 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.
Sincerely, ��Ulll�l
Mark A. MMRgo, P.E.
Florida En ffxQgmA test
Florida Re 4§20oF
Certificate oi. 1MW&,atWn
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