Spreader Beam.xls

Selecting Spreader Beam Check beam for ES/EEC 1 COMPRESSION STRESS 22046 1.5 33069 98.425 196.85 60.0 60.0 8.35

lbs times lbs in in

10000 kg

5000 mm

o o

b2

b1

in

Fc2

Fc1

h

Wgt tot = safety factor = Wgt tot = Y c.g = Ytot = b1 = b2 = h =

W1

W2 L =Ytot YC.G

Beam selected : H200x200x8/12 Properties : r xx = 0.339 in r yy = 0.221 in A = 9.85 in^2 Sx = 28.792 in^3 Material : A 36 Sy =

C.G 0.155 36000

psi

W1 = ((Ytot-Yc.g)/ Ytot)*Wgt tot = W2 = (Yc.g/ Ytot)*Wgt tot =

16534.5 lbs 16534.5 lbs

Fc1 = W1/ tan (b1) = Fc = Fc1 = Fc2

9546 lbs 9546 lbs

Compression Stress :

fa = Fc/A =

kL/r=

711.743

= Fc2

969.44 psi

, Allowable stress From AISC table 3-31 : Fa =

295 psi ,

increase the beam size

5.2 BENDING STRESS M1 =

Fc1*h =

Stress due to moment Bending stress allowable :

79677 lb.in

= M2

M =

M1

79677 lb.in

fb = Fb = Cm = F'ex =

M/Sx = 0.66*Sy =

2767 psi 23760 psi, hence

fb < Fb ( O K )

1 294.3 psi

Unity Check : Checking against AISC (equation H1-1) fa/Fa + Cmx*fbx/((1-fa/F'ex)*Fbx) + Cmy*fby/((1-fa/F'ey)*Fby) = Checking against AISC (equation H1-2) fa/0.6Sy + fbx/Fbx + fby/Fby =

0.16135144 < 1 ( O K )

3.237865 >1(increase the size of beam)

crease the size of beam)