D7.A.5 Member Capacities
D7.A.5.1 Checks for Axial Tension
In members with axial tension, the tensile load must not exceed the tension capacity of the member. The tension capacity of the member is calculated on the basis of the member area. STAAD calculates the tension capacity of a given member based on a user supplied net section factor (NSF -a default value of 1.0 is present but may be altered by changing the input value, see D7.A.7 Design Parameters) and proceeds with member selection or code checking.
D7.A.5.2 Checks for Axial Compression
The compression capacity for members in compression is determined according to the procedure of DIN 18800- Part 2. Compressive resistance is a function of the slenderness of the cross-section (Kl/r ratio) and the user may control the slenderness value by modifying parameters such as KY, LY, KZ and LZ.
D7.A.5.3 Checks for Bending and Shear
The bending compressive and tensile capacities are dependent on such factors as length of outstanding legs, thickness of flanges, unsupported length of the compression flange (UNL, defaults to member length) etc. Shear capacities are a function of web depth, web thickness etc. Users may use a value of 1.0 or 2.0 for the TRACK parameter to obtain a listing of the bending and shear capacities.