Kho thành phẩm

kN

tons

N-m

kg-m

ton-m

C x As x fs x D

(PCI Design Handbook)

Mcr

I

fb

kN-m

ton.m

m4

N/mm²

I / ro x (fb + fe)

3.142 /4 x (ro4 - ri 4) + ½ (n' - 1) x As x rs2

0.45 x fc 0.5 + 1.7

Mmax

W

ton.m

kg-m

ton/m

W x L2 / 8

(Công thức có tính toán)

2,60 x Pi x T x (D-T) / 106