HomeMy WebLinkAboutLetter- Tile Calculationsl� t
To:
CB Engineering Services, INC.
Ea 1301 NE 7 St. #303 Hallandale, FL 33009
Phone: 954-534-1612 Email: cbbortes@gmail.com
Whom it may concern
Client: Te owner
2119 NW Greenbriar Lane
Palm City, FL
RECEIVED].
OCT 27 2017
Permitting Department
St. Lucie County, FL
Re: Miami -Dade County HVHZ Electronic Roof Permit Form
Section E (Tile Calculations)
Method 1 "Moment Based Tile Calculations per RAS 128"
Location: 2119 NW Greenbriar Lane THESE P!._ANS AND -ALL PROPOSED WORK
ARE SW)JECT TO ANY CMI SECTIONS
Palm City, FL
REQUIRE0 SY FIELD INVECT086 TfW
MAY BE NBC ISSAI'1Y IN 01906N TO
I, the undersigned, perform the Tile Calculation according with Miami Dade Cou"M Mk4b.V S1Q §A G9990,
Method 1 "Moment Base Tile Calculation per RAS 128"
RAS 128 shows in Table 2 for a roof mean height below 20 feet, for (Risk Category II and Exposure Category D-
which is necessary to be considered for this location) the following value of the Minimum Design Wind Uplift
Pressures:
P1 in Roof Field Area = 51.4 psf
P2 in Roof Perimeter Area = 86.2 psf
P3 in Roof Corners Area = 129.7 psf
Calculation Results Shows the Minimum Resisting Moment for the location mentioned above
to be: (calculation sheet is attached to complete the report) RESULTS
Mr1 in Roof Field Area = 3.83 ft-Ibf <_ NOA Mf 118.90 ft-Ibf PASS
Mr2 in Roof Perimeter Area = 10.96 ft-Ibf <_ NOA Mf 118.90 ft-Ibf PASS
Mr3 in Roof Corners Area = 19.88 ft-Ibf < NOA Mf 118.90 ft-Ibf PASS
Installation Recommendation wM rIt — O-7 `T
From NOA No.: 16-0112.07 (Expiration Date: 06/07/21) ST. LUCIE COUNTY
Table 2 Aerodinamic Multipliers 0.205 cuft BUILDING DIVISION
REVIEWED
Table 3 Restoring Moments due to Mg = 6.71 ft-Ibf FOR COMPLI& JOE
Gravity For Slope REVIEWED Y /C
Table 4 Nail Attachement System Mf = 0.00 ft-Ibf DATE PLANS AND PERMIT
(NO NAILS USED) MUST BE KEPT ON JOB OR NO
Table 6 Adhesive Set System Mf = 118.90 ft-Ibf INSPECTION WILL BE MADE
Total Mf = 118.90 ft-Ibf
ACEALED FASTENERS OR ATTACHMENTS
ARE THE RESPONSIMLITY OF THE
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CONTRACTOR OF RE �!:�
u
„- L
CB Engineering Services, INC.
1301 NE 7 St. #303 Hallandale, FL 33009
Ea Phone: 954-534-1612 Email: cbbortes@gmail.com
If the Tiles will be attached on the Direct Deck (min 15/32” plywood) with Large paddy placement of 45 grams of
3M 2-Component Foam Roof Tile Adhesive AH-160, the tiles will meet the RAS 128, Current Miami Dade County
HVHZ and 2014 Florida Building Code Requirements.
Should you have any questions regarding the above, or if require additional information, please do not hesitate
to contact this office.
"Engineer seal is valid for pages 1 through 2"
Sincerely,
CB Engineering Services, INC.
(CA # 30935)
Signed by: Constantin Bortes M.S., P.E.
Florida P.E. # 77915
Date: 10/19/2017
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