Nature of Roof.

Span in feet.

ie beam. Depth includes 3" for joints.

Principal Rafters.

Queen Posts.

Struts.

Straining beam.

§ Purlins.

10ft.

bearing.

Common Rafters.

Queen

Post.

Trusses

10' centre to centre.

32

4"x4"

4"x4"

4" x 2"

4x2"

4"x5"

5"x7"

2" x 3"

34

4" x 4"

4" x 5"

4" x 2"

4"x2"

4" x 6"

5" x 7"

2" x 3"

36

4" x 4"

4 x5"

4" x 2"

4" x 3"

4x6"

5" x 8"

2" x 4"

38

4" x 4"

4x5"

4" x 2"

4" x 3"

4x6"

5" x 8"

2" x 4"

40

4 " x 5"

4"x5"

4"x2"

4" x 3"

4" x 7i"

5" x 8"

2"x4"

42

5"x5"

5"x5"

5" x 2"

5" x 3"

5" x 7"

5" x 8i"

2" x 4"

44

5"x5"

5"x5"

5"x2"

5"x3"

5"x8"

5"x8"

2"x4"

46

5"x5"

5"x5"

5"x 2"

5"x3"

5"x8"

5"x8"

2"x5"