This site is home to applications for engineers developed by Mark Lasby.

The applications on this site will be taken down December 1, 2024. If you are a Canadian structural engineer who is interested in hosting this software on your web site, please contact me at mark.lasby at marklasby,ca.I will give the recipient all source code and rights to modify the code as he/she sees fit. The recipient will assume full responsibility for the use and maintenance of the code.

The software use HTML for input and output and PHP for doing the calculations on the host server. Previous versions of the software used JavaScript for doing the calculations on the user’s computer. Both versions of the source code will be turned over to the recipient..

## Lateral Unsupported Wide Flange Beam - CSA S16-14

_{y}, ω

_{2}, M

_{f}and L. CSA S16-14 Design of Steel Structures clauses 11, 13.5 and 13.6 are applied in the calculations. L is the length of the un-braced compression flange, not the beam span. ω

_{2}is the bending moment gradient factor defined in clause 13.6(a).

## Wide Flange Beam Column - CSA S16-14

_{y}, C

_{f}, M

_{fx}, L

_{x}, L

_{y}, k

_{x}, k

_{y}, ω

_{2 }and I

_{req’d}. CSA S16-14 Design of Steel Structures clauses 11, 13.5 and 13.6 are applied in the calculations. The axial capacity calculations are based on the rolled section equations. The x axis is the strong axis. ω

_{1}= 1. L

_{x}and L

_{y}are the un-braced lengths about the x and y axes. L

_{y}is used to calculate the lateral torsion buckling moment. ω

_{2}is the bending moment gradient factor defined in clause 13.6(a).

## Square and Rectangular HSS Beam Column - CSA S16-14

_{y}, C

_{f}, M

_{fx}, L

_{x}, L

_{y}, k

_{x}, k

_{y}, ω

_{2 }and I

_{req’d}. CSA S16-14 Design of Steel Structures clauses 11, 13.5 and 13.6 are applied in the calculations. Dimensions and section properties are based on CSA G40.21, not ASTM A500. The axial capacity calculations are based on the Class C equations. For rectangular sections, the larger dimension is the strong axis. The x axis is the strong axis. ω

_{1}= 1. L

_{x}and L

_{y}are the un-braced lengths about the x and y axes. ω

_{2}is the bending moment gradient factor defined in clause 13.6(a).

## Round HSS Beam Column - CSA S16-14

_{y}, C

_{f}, M

_{fx}, L

_{x}, L

_{y}, k

_{x}, k

_{y}, ω

_{2 }and I

_{req’d}. CSA S16-14 Design of Steel Structure clauses 11, 13.5 and 13.6 are applied in the calculations. Dimensions and section properties are based on CSA G40.21, not ASTM A500. The axial capacity calculations are based on the Class C equations. ω

_{1}= 1. L

_{x}and L

_{y}are the un-braced lengths about the x and y axes. ω

_{2}is the bending moment gradient factor defined in clause 13.6(a).

## Structural Steel Section Properties

**Launch US Metric Section Properties**

The Canadian data is derived from CISC SST9.2 data file from the 9th edition of the Canadian Steel Handbook (2007). More up to date information has not been published by CISC in a machine readable format. In accordance with the license for SST9.2, you are prohibited from disseminating this data.