SECTIONS OF VINEHOUSES, SHOWING PITCH OF ROOF, ETC. Fig. 1. Span-roofed house, 25 ft. wide, showing height at centre, and length of rafter at angles (from the horizontal) of 30°, 350°, and 40° respectively. If the side walls are built 4 ft. instead of 5 ft. high, as is commonly done, the height at centre will be 12 in less. Fig. 2. Span-roofed house, 16 ft. wide, with side walls. 5 ft. high, showing height in centre, and length of rafter at angles of 30°, 35°, and 40°. Fig. 3. Lean-to house with front wall 4 ft. high, showing height of back wall, and length of rafter with roof pitched at 30°, 35°, and 40°, Note.—It is often convenient to gain head-room by lowering the floor, thus saving in height of wall.

New Zealand Journal of Agriculture, Volume 52, Issue 6, 20 June 1936, Page 340

SECTIONS OF VINEHOUSES, SHOWING PITCH OF ROOF, ETC. Fig. 1. Span-roofed house, 25 ft. wide, showing height at centre, and length of rafter at angles (from the horizontal) of 30°, 35 0 ° , and 40° respectively. If the side walls are built 4 ft. instead of 5 ft. high, as is commonly done, the height at centre will be 12 in less. Fig. 2. Span-roofed house, 16 ft. wide, with side walls. 5 ft. high, showing height in centre, and length of rafter at angles of 30°, 35°, and 40°. Fig. 3. Lean-to house with front wall 4 ft. high, showing height of back wall, and length of rafter with roof pitched at 30°, 35°, and 40°, Note. —It is often convenient to gain head-room by lowering the floor, thus saving in height of wall.