4. Plan Area AP = 15 x 3.5 = 52.5m2
Inclined area Ai = 2 x [8.08 x 3.5]
= 56.56m2
α = tan-1(3/7.5)
= 21.8˚
cosα = 0.928 sinα = 0.371
Total No. of Panels = Six
5. 1. Dead load calculations
1.Wt. of GI Sheet = 131 x 16.2 x 3.5 = 7427.7 ~ 7428 N
Self wt of Purlin Assumed = 100 N/m
Self wt. of truss
w= {(L/3) + 5} x 10
= {(15/3) +5} x10
= 100 N/m2
Total self weight of truss = 100 x 15 x 3.5
= 5250 N
Assumption:
G.I Sheets : 100-150 N/mm2
A.C Sheets : 170- 200 N/mm2
6. 2. Live load Calculations (IS: 875 Part II)
2. Live load Calculations (IS: 875 Part II)
LL= 750-20(α -10)
= 750-20(21.8-10)
= 514.00 N/m2.
Total LL = 15 x 3.5x 514
= 26985 N
LL per panel = [ (2/3) x 26985 ] / 6 = 2998 N
7. 3. Wind load calculations
For Hyderabad, Basic Wind Speed=VB=44m/s.
Vz=k1 x k2 x k3 x k4 x VB ……Cl. 6.3 (IS 875-3)
k1 = Risk Coefficient=1 (For 50 Years of life of structure)
k2 = Terrain, Height of Structure size factor
= For Terrain Cat. 2 Ht. up to 10m, L= 15m < 20
k2 = 1
k3 = Topography factor assuming level ground
k3 = 1
K4 = 1 (Importance factor)
Vd = Vz = 1x1x1x1x44 = 44 m/s
Basic Wind Pressure = 0.6 Vz
2
pz = 0.6 x 442
pz = 1161.6 N/m2
Say pz = 1170 N/m2 = 1.17 kN/ m2
