In order to estimate plane frames, beams and trusses, one can apply the spreadsheet based open source platform of Calc4fem. This useful construction software utilizes Finite Element Method for beam elements.
Calc4fem contains the following features :-
User Functions for obtaining outcomes for engineering templates.
Estimate with 2D linear static for beams, trusses, frames).
Transmit data to other free engineering program.
Over 10 load types for building structures
Displacements, reactions, envelopes for load combinations.