strain·ing beam 
(strānĭng)
(strānĭng)n.
A horizontal beam separating the tops of two queen posts in a truss. Also called straining piece.
- dioxane
- dioxide
- dioxin
- dip
- dipeptidase
- dipeptide
- dipetalous
- diphase
- diphasic
- diphenhydramine
- diphenoxylate
- diphenyl
- diphenylamine
- diphenylaminechloroarsine
- diphenylhydantoin
- diphenylketone
- diphosgene
- diphosphate
- diphosphoglyceric acid
- diphosphonate
- diphtheria
- diphtherial
- diphtheric
- diphtheritic
- diphthong