5.5m Span x 6m Bay Pyramidal Car Shade Loads

SINGLE SPAN CANTILEVER TUBULAR FRAMED SHADE HDPE FABRIC ROOF LOADINGS Sub: 5.5m span X 6M BAYS shade Structural Data: Span 5.5 m Height of pole "L" 3m Column Dia (Assumed) 165 mm 4 Eaves height of shaded Frame 2.35 m 2 Pitch of Shade 0.4 m pitch Bay Width ( C/c of poles) 6m L 3 1 SPAN c/c Member Properties: (assumed) Diameter Thickness eaves ht 1 Main Pole 165 5 mm 2 Pyramid members 48 3.2 mm 3 Chord 76.1 4 mm Section 4 Boom Tie 76.1 4.0 mm 6 Lateral Tie 76.1 3.2 mm PYRAMID Members Loadings Dead loads:

Self wt of members By design program Wt of fabric (0.83Kg/sq.m) 0.0168 kn/m on main frame Wt of fabric on pyramid member 0.011 kn/m Wt of fabric on lateral ties 0.008 kn/m Wind loads:

bay width

Chord

& 20 %Air permeability

Basic Wind Speed " V" Km/hr 100 28.0 m/sec Vs = V x S1 x S2 x S3 = 22.4 m/sec S1 = 1 S2* = 0.8 * Class B (horiz dim < 50m & ht < 5m S3 = 1 Dynamic Wind = 0.308 Kn/sq.m Wind Pressure Coefficients Cp Roof Angle Cp +ve (Down ward) all values of f Cp =

8.276

O

al Tie later

0.37 Considered for down load

Cpe wind angle 0 deg

PLAN

all values of f Cpe =

-1.16873 for f=0,Cp = -0.67 Table -14 BS 6399 Part-2 for f=1,Cp = -1.2 (Pressure co-efficients for DuePitched roof) (F = Cp x q x Bay width ) *0.8 -- (20% AIR PERMEABLE)

Wind force on Frame

(Down ward) +ve force on main frame0.146 = Kn/m Dowm force on pyramid memb 0.10 Kn/m Dowm force on lateral tie 0.07 Kn/m

Vehicle ht "h1"= shade - clear ht "h2"= f= h1/h2

(UP ward) -ve force on main frame =-0.460 Kn/m UP force on pyramid memb = -0.31 Kn/m UP force on lateral tie = -0.21 Kn/m Frictional Drag

=

Horizontal force on column =

Cfn = K=

0.015 Kn/m on frame 0.044 Kn/m

1.2 * Dx Vs = 4.1< 6 m2 /sec - Sub critical flow 0.73 for L/D ratio = 18.18

2.2 m' considered 2.34 m' from ff level 0.941