# Column Formwork Scaffolding Design Example

Wooden scaffolding calculation will be made for the 30x60 column of the project, which includes the plan and 3D model image.

Plywood thickness t=18 mm,

Plywood Flexural strength f

_{el}= 30 MPaPlywood Shear strength f

_{ek}= 3.0 MPaPlywood Modulus of Elasticity E

_{l}= 10000 MPaConcrete placing speed in the formwork R = 2m/hour

Concrete casting temperature T = 20°C

Ƥ_{max} = p = 58.5 kN/m^{2} = 0.0585 N/mm^{2}

**Primary beam interval, L _{bk}**

b

_{l}= 1000 mm t_{l}= 18 mmA

_{l}= t_{l}* b_{l}= 18x1000 = 18000 mm^{2}I

_{l}= [ b_{l}* ( t_{l}^3) ]/ 12 = 486000 mm^{4}S

_{l}= I_{l}/ ( t_{l}/ 2)= 54000 mm^{3}Ƥ

_{max}= p = 58.5 kN/m^{2}= 0.0585 N/mm^{2}

**Secondary beam interval, L _{ik}**

H20 was chosen as the primary beam section.

A

_{bk}= 9640 mm^{2}I

_{bk}= 45701333.333 mm^{4}S

_{bk}= 457013.333 mm^{3}

**Primary Beam material properties**

f

_{ebk}= 30 MPaf

_{ebk}= 3.0 MPaE

_{bk}= 14000 MPa

Lbk = 364.3mm

A

_{bk}= 9640 mm^{2}I

_{bk}= 45701333.333 mm^{4}S

_{bk}= 457013.333 mm^{3}f

_{ebk}= 30 MPaf

_{ebk}= 3.0 MPaE

_{bk}= 14000 MPa

**Rod Interval, L _{b}**

2xUPN 80 was chosen as the secondary beam section.

A

_{ik}= 2185.3 mm^{2}L

_{ik}= 2.0921x10 6 mm^{4}S

_{ik}= 52303 mm^{3}

**Secondary Beam material properties**

f

_{eik}= 235 MPaf

_{eq}= 141 MPaE

_{ik}= 200000 MPaRod diameter Φ = 17 mm

L

_{ik}= 753.8 mmA

_{ik}= 2185.3 mm^{2}I

_{ik}= 2.0921x10 6 mm^{4}S

_{ik}= 52303 mm^{3}f

_{eik}= 30 MPaf

_{eik}= 3.0 MPaE

_{ik}= 14000 MPaRod diameter Φ = 17 mm

Rod tensile capacity, N

_{d,b}N

_{d,b}= [ ( π*^{2}) / 4 f_{yb}= [ ( π*172 ) / 4 ] 235 = 53340.32 N = 53.34 kN

**Prop Control**

Axial load capacity of the support N

_{d}= 9.7 kNc = 1.2

q = 0.5 kN/m 2

In a 30/60 column, the worst case will occur on the 60 cm side.

w = q x c x b = 1.2 x 0.5 x 0.6 = 0.36 kN/m

W = w x h = 0.36 x 3 =1.08 kN

N

_{pc}= 1,278 kN < N_{d}= 9.7 kN

**Example of scaffolding drawings**

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