¶Of Trabe. cap. 163.
A Beame and also a gyest is called Trabes, and is a trée that stretcheth thwart ouer an house, and toucheth the walls in either ende, and holdeth them vp, that they fall not for great highnes, neither for leuieng, and is declined haec Trabs vel Trabes, and hath that name of Traho, that is to drawe or to reach, for they reach from one wal to another, and are ioyned and sticked therein, as Hugo saith.
And it néedeth that a gyest & a beame be long, strong, and great, and namely in the middle, lest they bend & were croo∣ked, if that they be too small in the mid∣dle, and so for dread of bending and of crooking, ofte it néedeth to vnderset them with posts or pillers, for such a thwarte ouer trée, set in that wise, néedeth to bée vnderset for succour, that they maye bée the better held vp, & beare heauy things that be laid therevpon.