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By
DATE: 4/18/18
CLIENT:
ADDRESS
PROJECT
ADDRESS
ENGINEERING & TESTING, INC.
Phone: (866) 781-6889 o ai: (866) 784-8550
m,ww.tloridaengineeringandtesting.com
250 S.W.13`" Avenue
Pompano Beach, FL 33669
JOB ORDER #: 18-1630
2017 FBC/ASCE-7 DESIGN PRESSURE CALCULATIONS
Proiect Information:
Height = 12' Exposure: C I Basic/Ultimate Wind Speed: V„it=170 mph
Length = 46' Category: 1I I Nominal Wind Speed: V.d=Vint*�0.6
Width = 29' Slope: < 7° j (asd = allowable strength design)
Parapet Wall: N/A Residential KZ = 0.85, Kzt = 1.0, Kd = 0.85
RECEIVED
I
Design Calculations:
APR 20 2018
Velocity Pressure: q = 0.00256*K KZtKdV2 I ST. Lucie county, Permitting
1 P —0 00250 6 85 1 0 0 85 170 2= 53 45 f
Ve ocrty ressure („ it). q— . ( . )(. I)( . )( ) . ps
Velocity Pressure (.d): q=0.00256(0.85)(1.0)(0.85)(170*�0.6)2 = 32.07 psf
I
Width of Pressure Coefficient: 0.1(29) j = 2.9'
0.4(12') = 4.8' } use: 3'0"
Effective Wind Area: <1 Oft2 j
l
For parapet height three feet (3') or larger,lzone three (3) shall be treated as zone two (2).
External Pressure Coefficient:
1)
GCP1 =
-1.0
2)
GCP2 =
-1.8
3)
GCP3 =
-2.8
Internal Pressure Coefficient:
1) GCPi = 0.18
j
Qriatitr/ ��\�� ✓lssrirance
Page 2, 4/18/18, Job Order #L- -'�30
Tradewinds Roofing, Inc.
Judy Stapleton Residence
Flat Wood Non -Insulated Deck
1806 Linwood Avenue; Fort Pierce, FL:
Design Pressures Based on Vsd:
1) Field
P1 = 32.07*[(1.0)
— (0.18)]
= -37.8 psf
2) Perimeter
P2 = 32.07*[(-1.8)
— (0.18)]
= -63.5 psf
3) Corners
P3 = 32.07*[(-2.8)
— (0.18)]
= -95.6 psf
Attachment Requirements Per RAS-117:
Based on the requirements of Florida Product �pproval # FL1046-R8, Appendix 1, Page
6 of 22, System No. W-11, with a maximum design pressure of-52.5psf, the following are
our recommended fastening patterns to attach the proposed two plies of PermaPly 28 or
Ventsulation base sheet to the minimum 19/32I' plywood deck utilizing approved 11 ga.
annular ring shank nails and 32ga., 1-5/8" diameter tin caps:
Field: 9" o.c. @ 4" laps and 2 staggered rows 12" o.c.
Perimeter: 9" o.c. @ 4" laps and 3 staggerel rows 9" o.c.
Corners: 9" o.c. @ 4" laps and 4 staggered rows 9" o.c.
Notes: Corners and perimeter area dimension shall not be less than a = TO"
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/proposed
conditions/decks as it pertains to the above provided product approval.
All work shall be inspected by our field engineer (or authorized
representative) or a building l department inspector to verify compliance
with specifications.
M i 1 Y 66�®/�i
NON
Sincerely, ��'•, o
/Vo ,
msryy � 9
1
Mark A. Mesiano,
Florida Engineering
Florida Reg. No. 48202�Z// L &
Certificate of Authorization M.16 3