Document QkX8kRRomo3YOxpeDvQKnyXx7

NAILING GYPSUM WALLBOARD______ SINGLE AND TWO-PLY APPLICATION PLAINTIFF'S EXHIBIT I * CO Csl (SINGLE AND DOUBLE NAILING METHODS) O' LLI RECOMMENDED NAILS AND SPACING GP-1004 CQ THICKNESS OR TYPE DESCRIPTION OF NAIL NAIL SPACING LLI SINGLE LAYER LL 1/4" thickness Flat head, diamond point nail of such Nails spaced not less than 3/8" from < < (for application over existing surfaces only) length as to give not less than 1" penetration into the framing member. ends and edges. At each support space nails a maximum of 7" for ceilings and a maximum of 8" for walls. Do not stagger nails on adjoining ends and edges. (See reverse side.) 3/8" thickness 1-1/8" or 1-1/4" long, annular ringed GWB-54 nail complying with ASTM Spec. C380-58T or 4d, 14 gage, 1-3/8" long, 7/32" flat head, diamond point, bright finish cooler. (A) Nails spaced not less than 3/8" from ends and edges. At each support space nails a maximum of 7" for ceilings, a maximum of 8" for walls. Do not stagger nails on adjoining ends and edges (see reverse side), or double nailing method may be used (see reverse side). 1/2" thickness 1-1/4" long, annular ringed GWB-54 nail complying with ASTM Spec. C380-58T or 5d, 13-1/2" gage, 1-5/8" long, 15/64" flat head, diamond point, bright finish cooler. For exterior use, use GWB-54 nail only. Same as (A) above or double nailing method may be used (see reverse side). 5/8" thickness TWO-PLY 6d, 13 gage, 1-7/8" long, 1/4" flat head, diamond point. (Use for fire rated con structions). 1-3/8" long, annular ringed GWB-54 nail complying with ASTM C380-58T where fire rated construction is not required. For exterior use, use GWB-54 nail only. Same as (A) above. Double nailing method may be used (see reverse side), except for fire rated constructions. (1) Adhesive between layers (1) First layer -- same as for single layer application of thickness used. (2) Face layer -- long enough to pene trate at least 3/4" into framing member. (1) Same as (A) above; drive nails flush with paper surface. (2) Use only enough nails to hold wallboard in place until adhesive develops adequate bond. Suggested spacing 12" on ceilings and 16" on walls. (2) No adhesive used between layers. (1) First layer -- same as for single layer application. (2) Face layer -- long enough to pene trate at least 1-1/8" into framing member. (1) Same as (A) above, except nails may be spaced a maximum of 14". Drive nails flush with paper surface. (2) Same as for single layer application or double nailing method may be used (see reverse side). AlA FILE NUMBER 23-L (3) Staple application of first-layer only. (Face layer applied as described above) (1) Staples shall meet the following minimum requirements: Wire -- 16 U. S. Standard gage flattened galvanized wire. Staple Crown -- Flat, 7/16" wide (out side measure). Staple Legs -- For 3/8" thick board -- 1" long with divergent points. For 1/2" thick board -- 1-1/8" long with divergent points. (1) Staples shall be driven with the crown at right angles to the paper bound edges of the wallboard except where the paper bound edges fall on the framing members, the staples shall be driven parallel to the edges. Staples shall be driven in such a manner that the crown bears tightly against the wallboard but does not cut into the face paper. The legs of the staple shall be no less than 3/8" from the ends and edges of the wallboard. Spacing of staples shall be 7" o.c. maximum on ceilings and 8" o.c. maximum on walls. SGP 0003154 May, 1959 SINGLE NAILING NAILS: (See Reverse Side) "SINGLE NAILING" SYSTEM PROCEDURE: The wallboard shall be held in firm contact with the nailing member while the nails are being driven. Nailing preferably should proceed from the central portion of each piece of wallboard towards ends and edges. Nails shall not be staggered on adjoining edges or ends. Perimeter nailing at the top and bottom is not required. DOUBLE NAILING NAILS: (See Reverse Side) "DOUBLE NAILING" SYSTEM PROCEDURE: 1. Two men are required to nail one ceiling board -- one man nails rows 1, 2, 3 and 4; the other nails row's 2A, 3A and 4A. 2. Starting at center of board, nails shown by dot are applied in row 1, then rows 2 and 2A, 3 and 3A, 4 and 4A, etc., always nailing from center to edges of sheet. 3. Apply "double" nails shown by circle O in the same manner as first nails, also starting at row 1. 4. As alternate procedure, "double" nails may be applied immediately after nailing of first nails in each row is completed ac cording to step "2" above. 5. Use single nails on perimeter of board. IMPORTANT: All three field (first) nails in each row should be applied before the "double" (second) nails are applied. It may be neces sary to "hit" the first nails in each row after the second nail is applied SGP 0003155