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 step rise Angle with ground Material

W1

W2

H D R1

R2

R3

A

A52163-E1

5

457 mm (18 in)

527 mm (20.8 in)

492 mm (19.4 in)

178 mm (7 in)

240 mm (9.54 in)

254 mm (10 in)

1256 mm (49.4 in)

53°

Aluminum

A52163-E2

5

400 mm (15.8 in)

470 mm (18.5 in)

435 mm (17.1 in)

178 mm (7 in)

240 mm (9.45 in)

254 mm (10 in)

1256 mm (49.4 in)

53°

Aluminum