Steel Alternating Tread Stair
What is an alternating tread stair and why would I use one?
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The steel alternating tread stair:
- Utilizes a three stringer design, with the alternating treads welded to the stringers.
- Handrails bolt in place during the installation process.
- Available in stainless steel, with a natural finish, and carbon steel with a variety
of finishes.
Stair Design Details
Table 1: Steel Alternating Tread Stair Design Details
|
Material
|
Carbon Steel |
Stainless Steel |
|
Stair Finishes |
Safety Yellow Powder Coat
Gray Primer Powder Coat
Iron Gray Powder Coat
Hot Dip Galvanized
Choice of Color Powder Coat
|
Natural finish only |
|
Angles |
56°
68° |
|
heights |
Custom height built to exact vertical height
Standard Rails:
• 36" to 240" in 56 Degree Angle
• 42" to 240" in 68 Degree Angle
Optional and Flush Rails:
• 48" to 240"
|
Rail Options
- Narrow (Original) Handrails - a close-fitting handrail with a 17" inside dimension.
Is an added safety feature by enclosing the body to provide additional upper body
support.
- Straight Handrails - Instead of narrowing partway down the stair, the handrail remains
straight, giving an additional 3" between the handrail. When you need additional
space between the handrails.
We recommend the "Narrow" (Original) handrail for the added safety it provides.
Still have questions? Contact us.
Table 2: Handrail tech specs
|
Configurations |
Rail Height --From Top Landing |
Inside Handrail Dimensions |
Outside Handrail Dimensions |
View Drawings |
|
Standard Narrow Handrail(original rail) |
42" |
17" |
23" |
56º
68º |
|
Standard Straight Handrail |
42" |
20" |
23" |
56º
68º |
|
Optional Narrow Handrail |
5-3/4" Steel |
17" |
23" |
56º
68º |
|
Optional Straight Handrail *roof Hatches |
5-3/4" Steel |
20" |
23" |
56º
68º |
|
Flush Handrail |
0" - Terminates at top Landing |
20" |
23" |
56º
68º |