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 Hook centers

Step depth First step rise Typical step rise Vertical rise, total Angle with ground Material

W1

W2

H D R1

R2

R3

A

A52163-F1

4

365 mm (14.4 in)

416 mm (16.4 in)

365 mm (14.4 in)

109 mm (4.28 in)

46.8 mm (1.84 in)

280 mm (11 in)

883 mm (34.8 in)

60°

Aluminum

A52163-F2

6

365 mm (14.4 in)

416 mm (16.4 in)

365 mm (14.4 in)

109 mm (4.28 in)

46.8 mm (1.84 in)

280 mm (11 in)

1370 mm (54 in)

60°

Aluminum