Bending moments and deflection formula
W = total load
w = kN/m
L = length
E = modulus of elasticity
I = moment of inertia
S = shear
= point load
= distributed load
= free support
= fixed support
Rectangular timber beam formula1 Obtain the imposed and deadloading for the beam.2 Select a strength class oftimber to define bendingstress (f).3 Choose breadth of beam.4 Calculate the maximumbending moment M in kNm
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