Span.

Tie beam, T.

Queen Post, QP.

Princesses PP.

Principal

Rafters,

PR.

Straining

Beam,

SB.

Struts, S.

Purlins, P.

Common

Rafters,

CR.

48 ft.

11½ by 6

6 by 5¾

6 by 2¼

7½ by 6

8¼ by 6

4½ by 2¾

8½ by 5

4 by 2

50 "

12 " 6

6 " 6¼

6 " 2½

8½ " 6

8½ "6

44 " 2¾

8¾ "5

41 " 2

52 "

12 " 6½

6 " 6¾

6 " 2¾

9¼ " 6

8¾ "6

4¾ " 2¾

8¾" 5¼

41 " 2

54 "

12 " 7

7 " 6¼

7 " 2¼

6½ " 7

9 " 6

4¾ " 2¾

8¾ " 5¼

4½ " 2

56 "

12 " 8

7 " 6¾

7 " 2½

7½ " 7

9¼ "6

5 " 2¾

8¾ " 5¼

4½ " 2

58 "

12 " 8½

7 " 7¼

7 " 2¾

8¼ " 7

9½ "7

5 " 2¾

9 "5¼

4¾" 2

60 "

12 " 9

7½" 7

7 " 3

9 " 7

10 "7

5 "3

9 "5½

4¾ " 2