open-frame girder

17 LETTERS · STARTS WITH O

open-frame girder is a valid 17-letter word worth 24 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

O1P3E1N1-0F4R1A1M3E1G2I1R1D2E1R1

1 + 3 + 1 + 1 + 0 + 4 + 1 + 1 + 3 + 1 + 0 + 2 + 1 + 1 + 2 + 1 + 1 =24 PTS

DOUBLE WORD → 48TRIPLE WORD → 72

MEANING

What does open-frame girder mean?