...
The modulus of elasticity of the culvert concrete are computed by default using the following equations:
( LRFD 5.4.2.4-1) :
...
(LRFD 5.4.2.4-1, 7th Edition):
(
...
CHBDC 8.4.1.7):
...
where, wc, γc = unit weight (i.e., density) of concrete and f’c = specified concrete strength
The user can of course override the program calculation of this value . Further discussion of other materials properties is included under the appropriate sections within this chapter of the user manualthrough input on the material properties section of the ‘Culvert Properties’ window.