Air, Light and Efficiency Showing Influence of Sash Types and Building Design . sh is made from heavy steel sections, of siich shape as toensure weather tightness at head, jambs, meeting rails and sill with-out the addition of weather strips. Being rolled in one piece, thesesections are more accurate in shape than asseml)lecl sections, andare free from the danger of internal corrosion. The latter featureapplies also to the sash joints, which are oxy-acetylene welded o\er the entire area of contact into permanentlyrigid units. Attendon is called to the formof head and sill, the latter of which
Air, Light and Efficiency Showing Influence of Sash Types and Building Design . sh is made from heavy steel sections, of siich shape as toensure weather tightness at head, jambs, meeting rails and sill with-out the addition of weather strips. Being rolled in one piece, thesesections are more accurate in shape than asseml)lecl sections, andare free from the danger of internal corrosion. The latter featureapplies also to the sash joints, which are oxy-acetylene welded o\er the entire area of contact into permanentlyrigid units. Attendon is called to the formof head and sill, the latter of which has adouble rise and is keyed with the cementto prevent warping and leakage. The top and bottom sash are hung over asingle pair of roller bearing pulleys, so thatthey open simultaneously, thereby ensuringequal air movements without thought on thepart of employes. To ensure free ventilation, the shade holdersho-\ in the illustrations on the next pageis recommended. As the shade is hung atleast r foot from the sash. Rapping in thewind is prc\xnted, and air has free passage.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectr, booksubjectwindows
