HomeMy WebLinkAboutDESIGN PRESSURE CALCULATIONSFLO A S6 Z— 610 ENGINEERING & TESTING, INC.
�R _ o Phone: (866) 781-6889 •Fax: (866) 784-8550
www.floiidaengineeringandtesting.com
250 S.W.13`h Avenue
FEB 2 7 2018 Pompano Beach, FL 33069
ST. Lucie C9unty, AermlL
DATE: 1/03/18 - ORDER #: 18-113
CLIENT: All Area Roofing
ADDRESS: 3921 S. US Highway 1 Fort Pierce, Florida 34982
PROJECT: McPherson Residence EMAX Rib 29 GA. Steel Roof Panels
ADDRESS: 9481 W Angle Road Fort Pierce, Florida
2014 FBC/ASCE 7-10 DESIGN PRESSURE CALCULATIONS
Proiect Information:
Mean Height = 10' Exposure: C Basic/Ultimate Wind Speed: V„,t=170 mph
Length = 5' to 57' Category: R Nominal Wind Speed: V,,,d=V,,it*40.6
Width = 10' to 36' Slope: 4/12 = 180 (asd = allowable strength design)
Parapet Wall: N/A Residential KZ = 0.85, Kzt = 1.0, Kd = 0.85
*Note: The most conservative dimensions were utilized for the design calculations below.
Design Calculations:
Velocity Pressure: q = 0.00256*KZKztKdV2
Velocity Pressure („it): q=0.00256(0.85)(1.0)(0.85)(170)2] = 53.45 psf
Velocity Pressure (ad): q=0.00256(0.85)(1.0)(0.85)(170*�0.6)2] = 32.07 psf
Width of Pressure Coefficient: 0.1(36')
0.4(10')
Effective Wind Area: <1 Oft
External Pressure Coefficient:
1)
GCP 1 =
-0.9
2)
GCP2 =
-1.7
3)
GCP3 =
-2.6
Design Pressures Based on Vasd:
= 3.6'
= 4.0' } use: 4'0"
Internal Pressure Coefficient:
1) GCPi = 0.18
1) Field
P1 = 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
bevy
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Quality'��\ A;✓ls trance
' Page 2, 1/03/18, Job Order #1a=43
All Area Roofing F1,01tIPA
McPherson Residence
EMAX Rib 29 GA. Steel Roof Panels
9481 W Angle Road; Fort Pierce, FL:
Attachment Requirements:
Based on the requirements of Florida Product Approval # 17022.8 with maximum design
pressures of . -86psf for the field and-146psf for the perimeter and corner zones; the
following are our recommended fastening patterns to attach the Extreme Metal
Fabricators, LLC's EMAX Rib 29 GA. Steel Roof Panels to the 15/32" plywood or wood
deck with #10xl-1/2" (min.) Hex Washer Head Wood Screw to penetrate 3/16" (min.)
thru bottom of support spaced at 9"o.c. across panel width and on each side and panel
overlap as follows:
Field
Perimeter & Corner
Area
(Method 1(Method
2
Maximum Total Uplift
-86psf
-146psf
Design Pressure
Fastener Row Spacing (Max.)
24"
12"
Fastener Spacing Located Per
9"-9"-9"-9"
911-9"-9"-9"
Details(Along Rows
Panel Side Laps Fastener
12" o.c. along panel length for all roof zones with
Spacing
#14x7/8" min. Hex -Washer Head Self -Drilling Screws
Notes: Corners and perimeter (edge, hip, & ridge) area dimension shall not be less
than a = 4'0" (Zone 2: Perimeter (including along ridges) is a 410" wide
strip, Zone 3: Corners are 4'0" x 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, 2014 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 co e with
specifications. O��e`�,���®//�i
Sincerely, ���` ; • �� N ��s� ����
No.4820
Mark A. Me s TESTATE OF
Florida EngineNA
, C:�rF�e�\`��
Florida Reg. No. ;8--
Certificate of Authct-i�dafWia 23