Wood - 14044

Table 4-1.-Weight and Maximum Sizes of Sheet Glass

Builder 3&2 Volume 02 - Construction manual for building structures
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corners and fabrication intersections to make the sash watertight. Put a coat of primer paint on all sealing surfaces of wood sash and carbon steel sash. Use appropriate solvents to remove grease, lacquers, and other organic-protecting finishes from sealing surfaces of aluminum sash. Wood On old wood sashes, you must clean all putty runs of broken glass fragments and glazier’s points— triangular pieces of zinc or galvanized steel driven into the rabbet. Remove loose paint and putty by scraping. Wipe the surface clean with a cloth saturated in mineral spirits or turpentine; prime the putty runs and allow them to dry. On new wood sashes, you should remove the dust, prime the putty runs, and allow them to dry. All new wood sashes should be pressure treated for decay protection. Metal On old metal sashes, you must remove loose paint or putty by scraping. Use steel wool or sandpaper to remove rust. Clean the surfaces thoroughly with a cloth saturated in mineral spirits or turpentine. Prime bare metal and allow it to dry thoroughly. On new metal sashes, you should wipe the sash thoroughly with a cloth saturated in mineral spirits or turpentine to remove dust, dirt, oil, or grease. Remove any rust with steel wool or sandpaper. If the sash is not already factory-primed, prime it with rust-inhibitive paint and allow it to dry thoroughly. GLAZING “Glazing” refers to the installation of glass in prepared openings of windows, doors, partitions, and curtain walls. Glass may be held in place with glazier’s points, spring clips, or flexible glazing beads. Glass is kept from contact with the frame with various types of shims. Putty, sealants, or various types of caulking compounds are applied to make between the glass and the frame. Wood Sash a weathertight joint Most wood sash is face-glazed. The glass is installed in rabbets, consisting of L-shaped recesses cut Figure 4-29.-Types of wood-sash glazing. into the sash or frame to receive and support panes of glass. The glass is held tightly against the frame by glazier’s points. The rabbet is then filled with putty. The putty is pressed firmly against the glass and beveled back against the wood frame with a putty knife. A priming paint is essential in glazing wood sash. The priming seals the pores of the wood, preventing the loss of oil from the putty. Wood frames are usually glazed from the outside (fig. 4-29). As we noted earlier, wood-sash putty is generally made with linseed oil and a pigment. Some putties contain soybean oil as a drying agent. Putty should not be painted until it is thoroughly set. A bead of putty or glazing compound is applied between the glass and the frame as a bedding. The bedding is usually applied to the frame before the glass is set. Back puttying is then used to force putty into spaces that may have been left between the frame and the glass. Metal Windows and Doors Glass set in metal frames must be prevented from making contact with metal. This may be accomplished by first applying a setting bed of metal-sash putty or glazing compound. Metal-sash putty differs from wood-sash putty in that it is formulated to adhere to a 4-25

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