Step

1. Design built up column
2. Spacing
3. spacing of battens
4. Size of batten

end batten $ \ \\ \ \ \\ \ \\ \ \ $ Intermedient batten

1. depth $ \ \ \ \ \ \ \ \ \ \ \\ \ $ depth d$\frac{3}{3}d^{'}$
2. Length $ \ \ \ \ \ \ \ \ \ $ length
3. thickness $ \ \ \ \ $ thickness

$d^{'}$=D=s+2cyy

L=s$\times2\ast$ overlap

t=$\frac{1}{50}\ast$ s

1. check for shear stress

2. Shear stress=$\frac{vb}{d\times t}\lt\frac{fu}{\sqrt{e}\ast\gamma mo}$

Vb=$\frac{Vt\times c}{2s}$

s=S+($2\times overlap)$

1. check for bending stress=$\frac{6m}{td^{2}}$

m=$\frac{Vt\times c}{2N}$

7 connection

find eighten length or Sw

8 Dig