SOMMER, in architecture, a girder or main beam of a floor; if supported on two storey posts and open below, it is called a bress or breast-summer. The word is also spelled " summer," and is the same as " sumpter," a pack-horse, Fr. sommier, O. Fr., saume, from Low Lat. salma, pack, burden, Gr. cray/aa, ffaTTdv, to fasten a pack on a horse.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)