Span 6 meters, simple beam support center force 380Kg, need to choose how large channel steel, how to calculate?
Span 6 meters, simple beam support center force 380Kg, need to choose how large the calculation of channel:1, it is estimated that the weight of channel steel is approximately concentrated load;2, according to carrying capacity calculation and 3.8KN as load basic combination, get P value;3. Calculate the bending moment M = 1/4 (p * L);The flexural strength of 4 Q235, the design value of F - =215N/mm hot-rolled steel;5. Section modulus Wx of channel steel = M/f;6, check the channel section mechanical parameters, will know the specifications of channel steel.
The bending moment M=3800/2*3N.m, the allowable stress takes delta = 200MPa, the modulus of bending section is obtained by W=M/ Delta, and the channel parameter is checked (GBT 706-2008, including the W value of channel steel of various specifications), and the suitable channel type is obtained.
Other answersIt is estimated that the weight of channel steel is approximately concentrated load, and the P value is obtained by combining load capacity with 3.8KN as the basic load.M = 1/4 moment calculation (p * L); flexural strength design of Q235 hot-rolled channel value f - =215N/mm; Wx = to section modulus of steel M/f; check the mechanical parameters on the channel cross section channel steel ruler specifications.GB50017-2003 "code for design of steel structures"
