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Nailing The Intermediate Uprights, Ledgers, Planks &
Ribbons
10.Nail the intermediate
uprights to the outside sill and ribbon board.11.Nail the intermediate ledger boards above the inside and outside ribbon. Ledgers are spaced 1.5 m apart when they support 2 inch (38 mm) thick platform planks.
12.Nail 2 by 10 inch (54 mm by 254 mm) planks to the scaffold ledgers to make a platform. The minimum platform width is 20 inches (508 mm). Minimum 6 inches (152 mm) and maximum 12 inches (305 mm) platform extention beyond supporting member. Planks must be fitted with cleats or nails to retain them on the supports. Maximum horizontal open space between the platform edges and the guard rails is 10 inches (254 mm). It is preferable that there is no open space to prevent people and material from falling through or off the scaffold.
13.Nail the ledgers and ribbon boards for the next level.
