Wainscoting is installed to protect finish walls which are subject to damage. It is made of wood, plywood, or
15.
other strong building material and covers the bottom 3 or 4 feet of an interior finish wall (para 3-10h).
Finish flooring is laid perpendicular to the floor joists (para 3-10i).
16.
Assume 6 1/2 inch rise,
17.
38 / 6.5 = 5.85, use 6 risers
Then, 38 / 6 = 6.33 or 6 1/3 inches actual rise
From first rule of thumb:
18 6 1/3 = 11 2/3 inches = tread
From second rule of thumb:
6.33 x 11.67 = 73.8 inches (is between 70 and 75 inches, therefore within limits)
The bottom riser is always less than the other risers by the thickness of the tread. Thickness of 2 x 12 lumber
18.
is actually 1 1/2 inches. Therefore 7 -1 1/2 = 5 1/2 inches, height cut for bottom riser (para 3-12c, c(4)).
When a roof jack is not available, the sheathing and other wood should be at least 6 inches from the stovepipe
19.
(para 3-14a).
When the stovepipe goes out through the wall, no flashing is required. A piece of sheet metal slightly larger
20.
than the wall opening, with a hole the size of the pipe, is necessary. This is nailed over the opening in the
wall (para 3-14b(1)).
3A-2
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