Lapped Floor Joist Rafter Layout

In this case the framer used 9 8d nails on each side of splice which is adequate in this case.

Lapped floor joist rafter layout.

The tops of inclined rafters are fastened to the ridge or another rafter depending on the type of roof. Use your common sense when deciding how many fasteners are needed. Floor joists tied overwood beam girder or partition table nailing schedule 2304 9 1 1 inch by 4 inch left in ribbon strip recommend attachment with two 8d common recommended face nail each joist lapped with adjacent stud with three 16d common or box nails similar to item 17 table 2304 9 1 joists bearing on concrete or masonry. Rafters rest on the top wall plate.

Span ft 1 5 2 0 2 5 3 0 3 5 2 30 22 18 15 13 4 59 44 36 30 25 6 89 67 53 44 38 8 119 89 71 59 51 10 148 111. In our sketch the mid span rafter tie is shown as under neutral force. Rafters are nailed to the plate. Splitting the wood does no good.

Rafters rafters make up the main framework of all roofs. Rafter plate joints 34 35 36 37 rafter purlin plate joints 38 rafter tails 35 36 37 raising plate 10 12 17 relish 2 11 16 21 ridge beam 38 ridge board 39 scribe rule square rule 3 shear 46 short joist 26 sill corner joints 20 sloped tabled corner lap 20 soffit tenon 25 splayed scarfs 48 49 spurred shoulder 25. Cmhc 2014 click to enlarge any image canadian building code for intermediate support for rafters joists. Pictured at left is a diagram of some recommend prescriptive repair techniques for floor joists.

They are inclined members spaced from 16 to 48 inches apart. In this case the framer just needed a longer rafter.