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(Figure 54). Nail a 38 × 64 mm (2 × 3 in. nominal) ledger strip to the beam with two 82 mm (31⁄4 in.) nails for each joist supported on the beam. The ends of the joists may be spliced as shown in Figure 54. Joists framed into the side of a steel beam may be supported on the bottom flange or on a 38 × 38 mm (2 × 2 in. nominal) ledger strip bolted to the web with 6.3 mm (1⁄4 in.) bolts spaced 600 mm (24 in.) on centre. Splice the joists (Figure 55) and provide at least a 12 mm (1⁄2 in.) space between the beam and the splice to allow for joist shrinkage.
FOUNDATION WALL-FLOOR CONNECTION There are two methods of wall and joist connection used in platform framing: the sill-plate method and the joist-embedded method.
Sill-Plate Method The sill-plate method is the most common form of connection and can be used with either concrete or concrete block foundation walls. It consists of a wood sill plate anchored to the
54 Joists supported on ledger strips nailed to beam at least 2–82 mm (31⁄4 in.) nails at each end of splice built-up wood beam 38 x 64 mm (2 x 3 in.) ledger strip 38 x 38 x 600 mm (2 x 2 x 24 in.) splice with at least 12 mm (1⁄2 in.) space between the splice and the beam wood floor joist
55 Joists framed into a steel beam
steel beam joists connected by 38 x 38 mm (2 x 2 in.) splices with at least 12 mm (½ in.) space between the splice and the beam joist alternatively, the joists may be supported on a minimum 38 x 38 mm (2 x 2 in.) wood plate bolted through the web of the beam