L. L. C.
ROARK
75 W. Baseline Rd. Ste A 19-20 Gilbert, AZ 85233 P 602 | 490 | 0849 f 602 | 419 | 2100 email
[email protected] web www.roarkconsultants.com
CONSULTING
Design Documents Fabric Canopy
Project: WIND CALCULATION FOR CANOPY
L. L. C.
ROARK
75 W. Baseline Rd. Ste A 19-20 Gilbert, AZ 85233 P 602 | 490 | 0849 f 602 | 419 | 2100 email
[email protected] web www.roarkconsultants.com
CONSULTING 1. Scope of work:
Design of Steel frame canopy.
2.
Materials: Structural Steel Structural steel shall be designed in accordance with the specification given in steel construction manual - AISC 14th edition – LRFD Method. Structural Steel Shapes: Shapes
ASTM Designation
Mechanical Properties
W
A992
Fy = 50 ksi
Fu = 65 ksi
HSS
A500 Gr. B
Fy = 46 ksi
Fu = 58 ksi
Plate
A36
Fy = 36 ksi
Fu = 58 ksi
3. Criteria and Approach for design of Framing for Gravity Loads: Loads are calculated for the Framing members & they are checked in bending, shear and deflection.
4. Loading: Dead Load
=
3 psf
Live Load
=
5 psf
Wind Load
=
115 mph, Exposure Category “C” (ASCE 7-10)
L. L. C.
ROARK
75 W. Baseline Rd. Ste A 19-20 Gilbert, AZ 85233 P 602 | 490 | 0849 f 602 | 419 | 2100 email
[email protected] web www.roarkconsultants.com
CONSULTING 5. Load Combinations 1.2DL+1.6LL
1.2DL + 1.6LL + 0.5WL 1.2DL+ 1.0 WL + 1.0LL 0.9DL + 1.0WL
6. Serviceabiltiy Combinations (For Deflection Check) 1.0LL 1.0DL + 1.0LL 1.0DL + 0.5LL + 0.7WL
7.
Deflection Limits 1.0LL
=
L/360
1.0DL + 1.0LL
=
L/240
1.0DL + 0.5LL + 0.7WL
=
H/120
L. L. C.
ROARK
75 W. Baseline Rd. Ste A 19-20 Gilbert, AZ 85233 P 602 | 490 | 0849 f 602 | 419 | 2100 email
[email protected] web www.roarkconsultants.com
CONSULTING
WIND LOAD CALCULATIONS -
For Monoslope Roof
Mean Roof Height
=
16-6”
Exposure Category
=
“C”
=
00
Ө
(Refer 1609.4 IBC2012)
For Flat roof, the net design wind pressure is given by P
=
qhG Cp – qi(G Cpi)
qh
=
0.00256 Kz Kzt Kd V2
Kz
=
0.865
Kzt
=
1
Kd
=
0.85
V
=
115 mph
=
0.00256 (0.865)(1)(0.85)(115)2
=
24.89 psf
G
=
0.85
Cpi
=
+0.18
=
-0.18
(ASCE 7-10, section 27.4.1)
Where,
(AISC, Table 27.3-1. For ht ≤ 15ft and Exposure C)
(AISC, Table 26.6-1)
Therefore, qh
For Enclosed buildings ,(AISC, Table 26.11-1)
L. L. C.
ROARK
75 W. Baseline Rd. Ste A 19-20 Gilbert, AZ 85233 P 602 | 490 | 0849 f 602 | 419 | 2100 email
[email protected] web www.roarkconsultants.com
CONSULTING -
For Roofs made of fabric Wind load of canopy Roof are calculated based on ASCE 7-10, Chapter 30, and Part 1 section 30.1.1“Wind Load -Components and Cladding” WIND LOADING ANALYSIS - Roof Components and Cladding
Per ASCE 7-10 Code for Bldgs. of Any Height with Gable Roof
