Section 504.4 covers the current ADA Standards for the tread surfaces on stairways.
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Tread Surface: ADA Standard Section 504.4
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Nosings: ADA Standard Section 504.5
Section 504.5 covers the current ADA Standards for stair nosings.
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1011.5 Stair treads and risers
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Wet Conditions: ADA Standard Section 504.7
Section 504.7 covers the current ADA Standards for wet conditions at stairways.
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11B-504.7 Wet conditions
Stair treads and landings subject to wet conditions shall be designed to prevent the accumulation of water....
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11B-504.4 Tread surface
Stair treads shall comply with Section 11B-302. Changes in level, slopes exceeding 1:48, and detectable warnings shall not be permitted. Exception: Reserved....
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Can stair treads and risers be perforated?
Stair treads must meet requirements for floor or ground surfaces which specify that surface openings not allow passage of a sphere more than ½ inch in diameter (§302.3)....
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11B-504.5 Nosings
The radius of curvature at the leading edge of the tread shall be ½ inch (12.7 mm) maximum....
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11B-504.2 Treads and risers
All steps on a flight of stairs shall have uniform riser heights and uniform tread depths. Risers shall be 4 inches (102 mm) high minimum and 7 inches (178 mm) high maximum....
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Treads & Risers
...do the stairs have closed risers so a crutch or cane cannot slip through the open space between the stair risers and people will not lose their balance as they climb the stairs?...
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R408.2 Treads and Risers
R408.2 Treads and Risers. All steps on a flight of stairs shall have uniform riser heights and uniform tread depths....
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R408.4 Tread Surface
R408.4 Tread Surface. Stairway treads shall comply with R302.7. Changes in level are not permitted....
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American Stair Corp. FasTrack Treads & Landings
FasTrack® treads combine slip resistance with economy. More sound dampening than a traditional Checker Plate tread, FasTrack® is ideal for either indoor or outdoor use....
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American Safety Tread Co., Inc. Cast Metal Safety Stair Nosing Style 801
American Safety Tread cast metal stair nosings, structural treads, platforms, thresholds, and elevator sills have been installed in thousands of projects across the United States, Canada...
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1009.7 Stair treads and risers
1009.7 Stair treads and risers. ......
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Treads and Riser Specifications in the ADA Standards (§504)
Treads and Riser Specifications in the ADA Standards (§504) Nosing Specifications...
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Figure 504.5 Stair Nosings – Drawing from the U.S. Access Board
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1011.5.2 Riser height and tread depth
... Exceptions: 4. See California Fire Code Chapter 11 and California Existing Building Code for the replacement of existing stairways. [DSA-AC] For applications listed in...
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American Safety Tread Co., Inc. Stair Nosing Style 950
Surface Design: Cross Hatched Non-Slip cast metal stair nosing with #24 virgin grain Silicon Carbide abrasive granules embedded into the walking surface while the matrix is in a molten...
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American Safety Tread Co., Inc. Stair Nosing Style 850
Surface Design: Cross Hatched Non-Slip cast metal stair nosing with #24 virgin grain Silicon Carbide abrasive granules embedded into the walking surface while the matrix is in a molten...
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Wooster Products Spectra Safety Treads (WP3C)
2D Drawing Section of Stair Tread...
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Wooster Products Supergrit Safety Treads (231BF)
2D Drawings Section of Stair Tread...
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504.4 Tread Surface
504.4 Tread Surface. Stair treads shall comply with 302. Changes in level are not permitted. EXCEPTION: Treads shall be permitted to have a slope not steeper than 1:48....
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504.4 Tread Surface
Stair treads shall comply with 302. Changes in level are not permitted. EXCEPTION: Treads shall be permitted to have a slope not steeper than 1:48. Advisory 504.4 Tread Surface....
