Here is a universal, quick, and directly applicable formula for calculating carbon fiber fabric usage for column, with separate formulas for square and round columns. It's easy to understand and can be used directly on-site.

Core Prerequisites

Full Coverage Reinforcement: Only the sides of the column are covered; the top and bottom surfaces are not covered, conforming to standard engineering practices. Partial Height Coverage: Simply replace the total height in the formula with the actual coverage height.

Number of Layers: Calculated as 1 layer; for multiple layers, multiply by the number of layers.

Usage Formula Logic:

Single Column Coverage Area = Column Perimeter × Column Height

Total Usage = Single Column Area × Number of Columns

Actual Material Preparation: It is recommended to add 5%~10% for wastage (overlap, cutting, and corner waste).

Calculation of Carbon Fiber Usage for Square Columns (Most Commonly Used)

1. Quick Formula

The cross-section of the square column is rectangular, with side lengths a and b, and a column height H.

Expand the perimeter 

L=2(a+b)

Area of a single square column

s=L*H=2(a+b)*H

Total area

S=s*N

(N is the number of columns.)

Special: Square column(a=b),so

s=4aH

S=4aH*N

A Filipino client asked: "17 columns, each measuring 0.20*0.20*3 meters. For a single-story, fully enclosed structure, how many square meters of unidirectional carbon fiber are needed?"

Based on the requirement

a=b=0.2; H=3, N=17

S=4aH*N

S=4*0.2*3*17

S=40.8

Add 10% loss allowance for material preparation.

S=40.8*(1+10%)

S=40.8*1.1=44.88 sqm

Calculation of carbon fiber usage in cylindrical cylinders

Quick Formula

Cylinder Diameter: D

Radius: r

Cylinder Height: H

Expand the perimeter 

L=πD=2πr

Area of a single square column

s=L*H=πD*H=2πr*H

Total area

S=s*N=L*H*N

A South African client asked: "We have 10 columns that need reinforcement. Each column is 0.3 meters in diameter and 3 meters high. How much carbon fiber do we need?"

Based on the requirement

D=0.3

H=3

N=10

S=L*H*N=πD*H*N

(π=3.1416)

S=3.1416*0.3*3*10

S=28.27

Add 10% loss allowance for material preparation.

S=28.27*(1+10%)=28.27*1.1

S=31.10 sqm