A-A-52163 Ladders, Vehicle-BoardingThis CID covers nine different types of portable, metal, step-ladders hereinafter referred to as ladders for use by personnel in boarding vehicles.

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PIN number

A52163-H1

Number of steps

4

Width, inside rails

W1

314 mm (12.4 in)

Width, outside rails

W2

375 mm (14.8 in)

Hook centers

H

367 mm (14.4 in)

Step depth

D

229 mm (9 in)

First step rise

R1

146 mm (5.75 in)

Typical step rise

R2

286 mm (11.2 in)

Vertical rise, retracted

R3

1140 mm (45 in)

Vertical rise, extended

R4

1430 mm (56.2 in)

Angle with ground

Material

A

48o

Steel