HomeMy WebLinkAboutFORENSIC ENGINEERING CONSULTANTS FORMForensic engineering Consaftants, Inc.
BASE SHEET ATTACHMENT CALCULATIONS
Project Name St. Lucie County Road & Bridge Division Report No.: TRS-BS-18.011
Project Address 3071 Oleadder Avenue
Fort Pierce, FL - 34982
Deck Substrate
Wood
Mean Roof Height
12.0 Feet
Configuration
Low Slope
Roof Area (Approx.)
SCANNED
6186 Sq.Ft.
Category
III
Max. Roof Width
49.0 Feet
Exposure Condition
C
BY Perimeter Width
St.
4.8 Feet
Building Type
Enclosed
Lucie County Parapet Height
0.0 Feet
Base Wind Speed
180 mph
Corner Zones
4.8' x 4.8' Each
Slope V
Uplift Pressures qz
0.0 Slope H 12.0
q: K: KA
60.227 0.850 1.005
0.00256 Kz Kr Kd V2
Ka V
0.85 180
Slope Angle' 0.00
P =
q= (GCP - GCPi)
GCP
GCP;
-1.00
0.18 Field
-1.80
0.18 Perimeter
-2.80
0.18 Corner
Field PI alt -71.07 psf P1 asd -42.64 psf
Perimeter P2 n.-119.25 psf P2 asd -71.55 psf
Corner P3 A -179.48 psf P3 asd-107.69 psf
Proposed System Johns Manville SBS Modified Bitumen Roof Systems
Product Approval No. FL2948-R12 (Page 8 of 50) System No. W-16
System Design Pressure -52.5 psf
Fasteners UltraFast Fasteners or All Purpose Fasteners with UltraFast Metal Plates
Base Sheet Width 39 inches Side Lap 4 inches Net Width 35 inches
Fastener Spacing in Lap of Base Sheet 8 inches # Rows 1
Fastener Spacing in Field of Base Sheet 8 inches # Rows 3
Min, Characteristic Resistance Force -25.52 Ibf
Fastener Spacing {(MCRF/P;) x 144)/Row Spacing
No. of Rows of Fasteners 4 5 6 7
Field Fastener Spacing 9.85 12.31 14.77 17.24
Perimeter Fastener Spacing 5.87 7.34 8.81 10.27
Comer Fastener Spacing 3.90 4.88 5.85 6.83
RECOMMENDED BASE SHEET ATTACHMENT PATTERN
Field 1 row in the laps at 8 inches o.c. 3 rows in the center of sheet at 8 inches o.c.
Perimeter 1 row in the laps at 7 inches o.c. 4 rows in the center of sheet at 7 inches o.c.
Corner 1 row in the laps at 5 inches o.c. 5 rows in the center of sheet at 5 inches o.c.
These calculations have been done in accordance with ASCE 7-10, based on the information provided by the
contractor. The roof system must be installed in accordance with the FBC & manufacturer's recommendations.
Follow all life safety & fire safety requirements of the Florida Building Code and OSHA requirements.
Sincerely
Fojc Engineering Consultants, Inc.
OR
R. ncpN. ailEngi n, P.E. FILE CAO'
principal Engineer -
Florida Registration No. 46696
Forensic Engineering Consultants, Inc. (CA #8265), P.O.Box 970034, Boca Raton, FL - 33497 Ph (561) 901 8490 Fax (561) 218 3830
Forensic engineering Consultants, Inc.
BASE SHEET ATTACHMENT CALCULATIONS
Project Name
St. Lucie County Road & Bridge Division Report No.: TRS-BS-17.016
Project Address
3071 Oleadder Avenue (Revised)
Fort Pierce, FL - 34982
Deck Substrate
Wood Mean Roof Height 12.0 Feet
Configuration
Low Slope Roof Area (Approx.) 6186Sq. Ft.
Category
III Max. Roof Width 49.0 Feet
Exposure Condition
C Perimeter Width 4.8 Feet
Building Type
Enclosed Parapet Height 0.0 Feet
Base Wind Speed
180 mph Corner Zones 4.8' x 4.8' Each
Slope V
0.0 Slope H 12.0 Slope Angle° 0.00
Uplift Pressures
qz = 0.00256 Kz Kn Kd V2 P = q� (GCP - GCP;)
qz K.
Kit Kd V GCP GCP;
60.227 0.850
1.005 0.85 180 -1.00 0.18 Field
-1.80 0.18 Perimeter
-2.80 0.18 Corner
Field Pt Uft.
-71.07 psf Pt asd -42.64 psf
Perimeter P2 n.
-119.25 psf P2asd -71.55 psf
Corner P3 an.
-179.48 psf P3 asd-107.69 psf
Proposed System
Johns Manville SBS Modified Bitumen Roof Systems
Product Approval No.
FL2948-R12 (Page 9 of 50) System No. W-20
System Design Pressure -60 psf
Fasteners
11 ga. Annular Ring Shank Nails and 32 ga. 1-5/8" dia. Tin Caps
Base Sheet Width
39 inches Side Lap 4 inches Net Width 35 inches
Fastener Spacing in
Lap of Base Sheet 9 inches # Rows 1
Fastener Spacing in
Field of Base Sheet 9 inches # Rows 2
Min. Characteristic Resistance
Force -43.75 Ibf
Fastener Spacing
{(MCRF/Pi) x 144}/Row Spacing
No. of Rows of Fasteners 3
4
6
Field Fastener Spacing 12.66 16.89 21.11 25.33
Perimeter Fastener Spacing 7.55 10.06 12.58 15.09
Corner Fastener Spacing 5.01 6.69 8.36 10.03
RECOMMENDED BASE SHEET ATTACHMENT PATTERN
Field 1 row in the laps at 9 inches o.c. 2 rows in the center of sheet at 9 inches o.c.
Perimeter 1 row in the laps at 9 inches o.c. 3 rows in the center of sheet at 9 inches o.c.
Corner 1 row in the laps at 6 inches o.c. 3 rows in the center of sheet at 6 inches o.c.
These calculations have been done in accordance with ASCE 7-10, based on the information provided by the
contractor. The roof system must be installed in accordance with the FBC & manufacturer's recommendations.
Follow all life safety & fire safety requirements of the Florida Building Code and OSHA requirements.
Sincerely
Fore is Engi eenng Consultants, Inc.
flip '
8 ;g
R. eSailappan, P.E. 2� I
Principal Engineer fill
Florida Registration No. 46696 '
Forensic Engineering Consultants, Inc. (CA #8265), P.O.Box 970034, Boca Raton, FL - 33497 Ph (561) 901 8490 Fax (561) 218 3830