Alternating Tread Stairs
The Lapeyre® Alternating Tread Stair features a unique tread design which provides
greater tread depth than vertical ladders or ship's ladders.
The alternating tread stair:
- Allows comfortable face forward descents at steep angles.
- Includes close fitting handrails which provide support.
- Has a cushioned central stringer which virtually eliminates the possibility of hitting
the nosing of a tread.
Common applications include:mezzanine access, roof
tops or roof hatches, equipment access, conveyors, catwalks, storage tanks, crossover
systems, or just about anywhere you would use a fixed ladder or need steep stairs.
Stair Design Details
Table 1: Alternating Tread Stair Options
|
Stair Specs |
Steel |
Aluminum |
|
Heights |
Custom height built
Standard Handrails:
56° - 36" to 240"
68° - 42" to 240"
Optional Handrails:
48" to 240"
Flush Handrail:
48" to 240"
|
Custom height built
Standard Handrails:
24" to 216"
Optional Handrails:
55" to 216" inches
|
|
Angles |
56° AND 68°
|
68° ONLY
|
|
Material with Finishes |
-Carbon Steel in Safety Yellow Powder Coat
-Carbon Steel in Gray Primer Powder Coat
-Carbon Steel in Iron Gray Powder Coat
-Carbon Steel, choice of
colors .
-Carbon Steel in Hot Dip Galvanized
-Stainless Steel with Natural
|
Natural Finish ONLY |
How the Alternating Tread Stair Works
|
|
|
|
Conventional Stair |
Steep Stair |
Alternating Tread Stair |
|
Imagine walking down (or up) a conventional stair. Each foot normally uses only
about half of each tread, stepping out and over the unused section (shaded red). |
On a steeper stair or ladder, the unused half tread becomes an obstacle, significantly
reducing the usable tread depth of the tread directly below. As the angle increases,
the problem becomes worse. |
In contrast, the Lapeyre stair removes the unused half of each tread, allowing the
foot to reach the next tread in a straight, direct line, providing more usable tread
depth. |