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

Number of steps Width, inside rails Width, outside rails Step depth

First step rise Typical step rise Vertical rise, total Angle with ground Material, rail Material, step

W1

W2

D R1

R2

R3

A

A52163-B1

3

508 mm (20 in)

559 mm (22 in)

241 mm (9.5 in)

146 mm (5.8 in)

330 mm (13 in)

987 mm (38.9 in)

60°

Steel tubing

Steel

A52163-B2

4

508 mm (20 in)

559 mm (22 in)

241 mm (9.5 in)

184 mm (7.25 in)

267 mm (10.5 in)

1190 mm (46.8 in)

60°

Steel tubing

Steel

A52163-B3

3

359 mm (14.1 in)

410 mm (16.1 in)

241 mm (9.5 in)

146 mm (5.8 in)

330 mm (13 in)

987 mm (38.9 in)

60°

Steel tubing

Steel

A52163-B4

4

359 mm (14.1 in)

410 mm (16.1 in)

241 mm (9.5 in)

184 mm (7.25 in)

267 mm (10.5 in)

1190 mm (46.8 in)

60°

Steel tubing

Steel