Page 288 - Masonry and Concrete

Paving

T

S
S
R S
15 /16" OR 1 7 /16"
12"

SINGLE RISERS

MIN. 12" T 12" MIN.

S

2 1 /8" OR 3 1 /4" R
12"

PAIRED RISERS

Paired Risers Single Risers
Minimum Maximum Minimum Maximum

Riser height
(R) 4 inches 6 inches 4 inches 6 inches

Tread length
1
⁄2 (T) 3'-0" 8'-0" 5'-6" 5'-6"
1 1 1 1
Tread slope ⁄8" ⁄4" ⁄8" ⁄4"
(S) per ft. per ft. per ft. per ft.
1 1 15 7
Overall ramp 2 ⁄8" 3 ⁄4" ⁄16" 1 ⁄16"
slope per ft. per ft. per ft. per ft.

Note: Recommended dimensions provide for one or three easy paces
between paired risers and two easy paces between single risers.

FIGURE 8-9
Stepped ramps.

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