A variety of special sizes are also available to provide an accessible way to install or remove large pieces of equipment from a building.
Lapeyre stair roof hatch.
The lapeyre stair features a unique alternating tread design which provides greater tread depth than vertical ladders or ship s ladders.
If a ladder is used the hatch may be rather small since the person comes straight up to the roof.
The angle at which a person ascends to the roof determines the size hatch required for convenient use.
Selecting the proper size hatch.
Special guidelines apply when measuring for alternating tread stairs that will be used to access a roof hatch.
For roof hatches the height is measured from a where the top landing of the stair is flush with the finished surface of the roof to b the lower finished floor where the foot of the stair will be secured.
Lapeyre originally coined the name lapeyre stair when he filed the patent on his alternating tread stair design and it was later adopted as the business name when the company was founded.
For roof hatch applications.
This is the most commonly used option for stairs going through an access.
Lapeyre stair s alternating tread stair is ergonomic improves safety and is efficiently designed.
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.
It rhymes with stair read our story.
The most common types of hatches that serve this purpose are single leaf models which have one cover and accommodate a single person.
Alternating tread stairs are built to exact vertical height.
Measuring guidelines for roof hatch applications.
These hatches are typically located over a ladder or staircase that.
Lapeyre is pronounced lah pair.
Reduce design time construction costs and installation errors with pre engineered stairs from lapeyre stair.
The lapeyre alternating tread stair offers a cost effective secure alternative to vertical ladders and steep stairs.
This design allows comfortable face forward descents at steep angles.
Space saving safety stair with alternating tread design for steep applications in lieu of ships ladders and vertical ladder.
Roof hatch design as previously mentioned roof hatches provide workers along with their tools and equipment easy access to roof areas.
These highly adaptable stairs meet relevant building codes and create a safer work environment.
As the angle of ascent decreases the hatch must be larger to prevent head bumping accidents.
How to measure for a roof hatch installation head clearance osha 1910 25 b 2.