When carrying out code checks, Steel Designer uses the following clauses of the applicable codes to check your structure. No other checks are performed unless they are specifically listed below.

"Specification for Structural Steel Buildings, Allowable Stress Design and Plastic Design", American Institute of Steel Construction, June 1, 1989 (contained in Manual of Steel Construction, Allowable Stress Design, 1989, 9th Edition).

Clauses used are A5.1, A5.2, B1, B3, B5, B7, C2, D1, E1, E2, F1, F2, F3, F4, G1, G2, G3, H1, H2

The design checking procedure is as follows;

The section is classified and tensile area and limiting slenderness ratios are determined according to section B.

For major and minor bending checks, the bending stress is checked to be less than the allowable Fb as found in sections F1, F2 and F3.

For major and minor shear, the shear stress is checked to be less than the allowable Fs found from section F4. The shear stress is computed using a shear area as shown above.

For major and minor deflection due to bending, the maximum deflection is checked to be less than L/300. No specific check is made for cantilevered members.

For tension checks, the tensile stress is checked to be less than the allowable Ft on both the gross and net areas as computed in section D1.

For slenderness checks, the slenderness ratio is computed as the maximum of KxL/rx and KyL/ry. This is checked to be less than the allowable slenderness ratio of 200 for compressive members or 300 for tensile members in accordance with clause E1.

For compression checks, the compressive stress is checked to be less than the allowable Fa as computed in section E2.

For combined compression and bending checks, the stresses are checked to be low enough to satisfy equations H1-1 to H1-3.

For combined tension and bending checks, the stresses are checked to be low enough to satisfy equation H2-1.

For sway checks, the horizontal deflection of the highest part of the member is checked to be less than Y/300 where Y is the height of the highest part of the member above the plane y=0.

Checks are not carried out on hybrid members, composite members or tapered members.

"Design Standard for Steel Structures", Architectural Institute of Japan, March 1979.

Clauses used are 5.1, 5.6, 6.1, 6.2, 8.1, 10.1, 11.1, 11.2, 11.3

The design checking procedure is as follows;

Allowable stresses are determined from table 5.1 and according to equations 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7 and 5.8 as appropriate.

For major and minor bending checks, the width-thickness ratio of the section's elements are checked in accordance with equations 8.1, 8.2, 8.3, 8.5 and 8.6 as appropriate. The bending stress is checked to be less than the allowable fb as found in section 5.1.4.

For major and minor shear, the shear stress is checked to be less than the allowable fs found from equation 5.2. The shear stress is computed using a shear area as shown above.

For major and minor deflection due to bending, the maximum deflection is checked to be less than L/300 in accordance with clause 10.1. No specific check is made for cantilevered members.

For tension checks, the tensile stress is checked to be less than the allowable ft as computed using equation 5.1.

For slenderness checks, the slenderness ratio is computed as the maximum of KxL/rx and KyL/ry. This is checked to be less than the allowable slenderness ratio of 200 for vertical members or 250 for non-vertical members in accordance with clause 11.2 (A vertical member is assumed to be one which is within 100mm of vertical).

For compression checks, the compressive stress is checked to be less than the allowable fc as computed in equation 5.3 or 5.4.

For combined compression and bending checks, the stresses are checked to be low enough to satisfy equations 6.1 and 6.2.

For combined tension and bending checks, the stresses are checked to be low enough to satisfy equations 6.3 and 6.4. The area of bolt holes as specified in the Bolt Holes dialog is deducted from the gross section area to calculate the net section area.

For sway checks, the horizontal deflection of the highest part of the member is checked to be less than H/300 where H is the height of the highest part of the member.