Crossword clue: in root construction, a horizontal member supported on the principals and supporting the common rafters.

The most common answer is purlin (6 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

purlin 6 letters web-def

In root construction, a horizontal member supported on the principals and supporting the common rafters.

purline 7 letters web-def

In root construction, a horizontal member supported on the principals and supporting the common rafters.