ASCE 7 load combinations without the spreadsheet drift
Structural engineers evaluate ASCE 7 Chapter 2 load combinations on nearly every design. The factors themselves are not hard — the failure mode is a spreadsheet cell that someone “improved” six months ago, or a notebook that only checks one combination. loadcomb is a small, dependency-free Python library and CLI that evaluates the basic LRFD and ASD combination sets on scalar load effects you already have from analysis. pip install loadcomb loadcomb --D 120 --L 80 --S 40 --W 55 --method LRFD from loadcomb import LoadCase , governing g = governing ( LoadCase ( D = 120 , L = 80 , S = 40 , W = 55 ), method = " LRFD " ) print ( g . id , g . value , g . formula ) What it handles Basic LRFD and ASD combinations from ASCE 7 Chapter 2 (Lr or S or R) resolved to the roof variable with largest absolute effect Automatic ± envelope for wind and earthquake Governing combination by absolute value What it is not Not FEA, not member design, not every exception in the standard. Confirm the ASCE 7 edition and local amendments for your project. Links pip install loadcomb GitHub PyPI Blog: sybilgambleyyu.github.io/posts/loadcomb.html MIT licensed.