Reach New Heights
From NASA to Miller Brewing, industry leaders choose the Lapeyre Alternating Tread Stair for its improved ergonomics and safety and its efficient design. This innovative alternative to steep stairways and ladders is ideal for factories and in-plant offices as well as ships and offshore vessels.
Eliminate hazardous ladders and safely access tight spaces such as:
- Mezzanines
- Rooftops or Roof Hatches
- Equipment access
- Machinery Conveyors
- Crossover Systems
- Storage and Walk Platforms
- Catwalks
- Pits
- Storage tanks
ATS Case Study: Wood Pizza and Taphouse
Problem
Employees needed safe access to a loft storage area, but space was a commodity in this icehouse turned taphouse in New Orleans' Central Business District.
Strategy
Lapeyre's Alternating Tread Stairs were installed in order to provide the access needed without compromising the limited space with a large staircase footprint.
Results
After a couple of weeks of practice, employees got the hang of the unique tread of the ATS system and were able to access storage quickly and easily.
How the Alternating Tread Stair Works
CONVENTIONAL 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).
STEEP STAIR
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.
ALTERNATING TREAD STAIR
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.
Stair Design Details
The Alternating Tread Stair has a flexible design that can be customized to meet the unique needs of individual projects.
 |
 |
| The STEEL alternating tread stair | The ALUMINUM alternating tread stair |
|---|---|
| Utilizes a three stringer design with alternating treads that weld to the stringers. | Utilizes a central stringer with curved treads that weld directly to the handrail. |
| Includes handrails that are bolted in place during the installation process. | Is ideal for outdoor areas where corrosion and rust are a concern, as well as rooftop applications where weight is a major consideration. |
| Is available in stainless steel with a natural finish and carbon steel with a variety of finishes. | Is shipped as one complete welded unit, ready to bolt into place. |
| STEEL | ALUMINUM | ||||
|---|---|---|---|---|---|
| ANGLES | 56° | 68° | 68° | ||
| HEIGHTS, Custom height built to exact vertical height | |||||
| Standard Handrail | 36" to 240" | 42" to 240" | 24" to 216" | ||
| Optional Handrail | 48" to 240" | 48" to 240" | 55" to 216" | ||
| Flush Handrail | 48" to 240" | 48" to 240" | |||
| FINISHES |
Natural Finish ONLY
|
||||
| Carbon Steel |
|
||||
| Stainless Steel | Natural Finish ONLY | ||||
| STEEL | ALUMINUM | |
|---|---|---|
| Standard Handrail | Extends 42" above the top landing of the stair and is used on most stair applications. | Extends 42" above the top landing of the stair. |
| Optional Handrail | This shortened rail extends 5-3/4" above the top landing of the stair and is designed for use within a roof hatch or a hatch with a standard 12” curb. This is the most commonly used option for stairs going through an access hatch. | Designed for roof hatch applications, this rail extends 3-3/4" above the top landing. |
| Flush Handrail | Rail terminates flush with the top landing of the stair. This rail is the least common and is used inside of access hatches with little to no curb. |
| STEEL | ALUMINUM | |||||||
|---|---|---|---|---|---|---|---|---|
| Standard Handrail |
Optional Handrail *Roof Hatches |
Flush Handrails | Standard Handrail (Original Rail) |
Option Handrail | ||||
| RAIL HEIGHT FROM TOP LANDING |
42" | 5-3/4" Steel | 0" - Terminates at top Landing |
42" | 3-3/4" Steel | |||
| INSIDE HANDRAIL DIMENSIONS |
20" | 20" | 20" | 20" | 20" | |||
| OUTSIDE HANDRAIL DIMENSIONS |
23" | 23" | 23" | 23" | 23" | |||
| VIEW DRAWINGS | 56° | 68° | 56° | 68° | 56° | 68° | View | View |
Alternating Tread Stair Benefits
A.) Accommodates hard-to-reach spaces and steep descents.
B.) Increases the comfort of steep incline descent with forward facing design.
C.) Offers a smaller footprint than a standard egress stair.
D.) Reduces risk of trips and falls by the use of a cushioned central stringer that virtually eliminates the possibility of hitting the nosing of a tread.
Related Products
You Stand on top of our stairs...
we stand behind them.