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Tread board

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Description

The steel ladder can be divided into four forms according to the presence or absence of the front fender and the connection with the ladder beam, which are represented as T1, T2, T3, T4.

From the economic point of view, and the convenience of production, the width of the tread plate should be set according to the modulus (for 5rnm thick flat steel, 125, 155, 185, 215, 245 for 30mm spacing; 125, 165/205 for 40mm spacing) /285mm, etc.)

Stairstep tolerance: width W (-3, +3mm), length L (-3mm)

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