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How to determine the correct Hatch Rail size
The RoofTop Accessories Hatch Rail is designed specifically for retrofitting an existing hatch with an OSHA compliant safety rail. Considering the all various types of roof hatches, we have found that with the right information it is fairly simple to determine the correct sized rail.
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On the diagram below mark the location of:
a. The Ladder
b. Hatch door hinge
c. Exit
Then measure and note:
d. Inside hatch dimensions.
e. Outside dimensions below flashing.
If the measurements don't match one of the models listed below, we will customize a HatchRail for you.
#2 Measure inside hatch dimensions.

Model No. |
Roof Hatch Opening |
Model No. |
Roof Hatch Opening |
HR-3232 |
24" x 24" |
HR-3238 |
24' x 30' |
HR-3244 |
24" x 36" |
HR-3838 |
30" x 30" |
HR-3844 |
30" x 36" |
HR-3862 |
30" x 54" |
HR-38104 |
30" x 96" |
HR-4444 |
36" x 36" |
HR-4456 |
36" x 48" |
HR-44104 |
36" x 96" |
HR-5656 |
48" x 48" |
G2436 |
Self Closing Gate |
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