Firms

• (a.) The principal rafters of a roof, especially a pair of rafters taken together.
Found on http://thinkexist.com/dictionary/meaning/firms/

Firms

Firms noun plural [ From Firm , adjective ] (Architecture) The principal rafters of a roof, especially a pair of rafters taken together. [ Obsolete]
Found on http://www.encyclo.co.uk/webster/F/33
No exact match found