I didn't see any choices for steel framed trusses in the finished roof category. I don't see any obvious options. The wall insulation does have steel stud choices however. Thanks.
BEopt cannot explicitly model steel trusses. You will have to choose a wood truss option with an equivalent assembly R-value.
Thanks. I researched steel truss assembly R-values compared to wood and the best I could find was https://www.sbcmag.info/article/2012/.... Because the deltas in the table aren't consistent I chose an average R-7 difference between steel and wood and increased an existing wood asssembly's framing factor in the 'Finished Roof' options to be R-7 less. I'm not sure if the top chord depth matters so long as the framing factor is adjusted to reduce the assembly R-value. Does this sound reasonable? Any other sources for comparing steel trusses to wood?
Comments