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Question:

Staircase bar marked, FC8 @ 250, is what is the bar? What is the meaning of F?

Staircase bar marked, FC8 @ 250, is what is the bar? What is the meaning of F?

Answer:

Pingfa on the staircase type more generally less used. This is a flat mark, on behalf of the distribution of ribs HRB400 diameter 8mm, spacing 250mm.
F is the meaning of the distribution of steel. Because the staircase is a one-way plate, so along the direction of the ladder for the reinforced steel, the other direction is the distribution of steel.

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