Concrete Formwork Design

ICONS

f_el = Mold plate bending strength [MPa]
f_ebk = Primary support beam bending strength [MPa]
f_eik = Secondary support beam bending strength [MPa]
f_kl = Mold plate shear strength [MPa]
f_kbk = Primary support beam shear strength [MPa]
f_kik = Shear strength of secondary support beam [MPa]
GK = Safety factor
p = Pressure on the formwork due to fixed and live loads [MPa]
E_l =Plate modulus of elasticity [mm ² ]
E_bk = Primary support beam modulus of elasticity [mm ² ]
E_ik = Secondary support beam modulus of elasticity [mm ² ]
A_l = Plate cross-sectional area [mm ² ]
A_bk = Primary support beam cross-section [ mm ² ]
A_ik = Secondary support beam cross-sectional area [mm ² ]
I_l = Plate section moment of inertia [mm ⁴ ]
I_bk = Primary support beam section moment of inertia [mm ⁴ ]
I_ik = Secondary support beam section moment of inertia [mm ⁴ ]
S_l = Plate section moment of inertia [mm ³ ]
S_bk = Primary support beam section moment of strength [mm ³ ]
S_ik = Secondary support beam section moment of strength [mm ³ ]
b_l = Formwork plate width
L_bk = Primary support beam spacing
L_ik = Secondary support beam spacing
N_d = Fastener tensile capacity or strut axial compressive capacity

Concrete formwork Design and carrier formwork scaffolding design calculation is below:​

The Concrete formwork components' modulus of elasticity and strength value is the characteristic value. For the strength value, GK = 2.0 is accepted.

• Primary Beam Interval, L_bk , Secondary Beam Interval, _Lik , Prop Interval, L_d , Rod Interval, L_b

• Primary Beam Intervals according to the selected plate thickness in slab formwork boards, beam bottom and top formwork boards, and column or shearwalls side formwork, L_bk ,

f_el= Formwork plate bending strength [MPa]

f_kl= Formwork plate shear strength [MPa]

GK = Factor of safety

p = Pressure acting on the formwork due to fixed and live loads [MPa]

E_l= Plate Modulus of Elasticity [mm²]

A_l= Plate sectional area [mm²]

I_l= Plate section moment of inertia [mm⁴]

S_l= Plate section moment of strength [mm³]

b_l= Formwork plate width

For slab and column-wall formwork, b_l= 1000 mm. In the beam lower formwork plates, b_l is taken as the width of the beam.

• Secondary Beam Intervals according to primary support beam dimensions to be used in slab, beam, column, and shear wall formwork, L_ik ,

f_ebk= Primary support beam bending strength [MPa]

f_kbk= Primary support beam shear strength [MPa]

GK = Factor of safety

p = Pressure acting on the formwork due to fixed and live loads [MPa]

E_bk= Primary support beam modulus of elasticity [mm²]

A_bk= Primary support beam cross-sectional area [mm²]

I_bk= Primary support beam section moment of inertia [mm⁴]

S_bk= Primary support beam section moment of strength [mm³]

L_bk= Primary support beam interval

• Rod Intervals to be used in column, shearwall, and beam side formwork, L_b

f_eik= Secondary support beam bending strength [MPa]

f_kik= Secondary support beam shear strength [MPa]

GK = Factor of safety

p = Pressure acting on the formwork due to fixed and live loads [MPa]

E_ik= Secondary support beam modulus of elasticity [mm²]

A_ik= Secondary support beam cross-sectional area [mm²]

I_ik= Secondary support beam section moment of inertia [mm⁴]

S_ik= Secondary support beam section moment of strength [mm³]

L_ik= Secondary support beam interval

N_d= Rod tensile capacity or prop axial pressure capacity

• The props of the slab formwork will be on each secondary support beam. Prop Intervals, L_d

f_eik= Secondary support beam bending strength [MPa]

f_kik= Secondary support beam shear strength [MPa]

GK = Factor of safety

p_d = Pressure acting on the formwork due to fixed and live loads [MPa]

E_ik= Secondary support beam modulus of elasticity [mm²]

A_ik= Secondary support beam cross-sectional area [mm²]

I_ik= Secondary support beam section moment of inertia [mm⁴]

S_ik= Secondary support beam section moment of strength [mm³]

L_ik= Secondary support beam interval

N_d= Rod tensile capacity or prop axial pressure capacity

• The props of the beam formwork will be on each secondary support beam.

f_eik= Secondary support beam bending strength [MPa]

f_kik= Secondary support beam shear strength [MPa]

GK = Factor of safety

p_d = Pressure acting on the formwork due to fixed and live loads [MPa]

E_ik= Secondary support beam modulus of elasticity [mm²]

A_ik= Secondary support beam cross-sectional area [mm²]

I_ik= Secondary support beam section moment of inertia [mm⁴]

S_ik= Secondary support beam section moment of strength [mm³]

L_ik= Secondary support beam interval

N_d= Rod tensile capacity or prop axial pressure capacity

• In column or shearwall formwork, at least one level of support should be used to carry the wind loads calculated according to 1.2.2.

• Wind effects are taken into account in the support design.

• The Ƥ_d value used to determine the Prop Interval, L _d, varies according to the sequential use of the scaffoldings. The total number of stories (n) where the props are used sequentially, starting from the ground story, is entered as user-defined.

• If the number of primary beam, secondary beam, rod, or prop is 2, the interval values ​​are reduced by multiplying by 0.8.

• When calculating the prop interval, the total load (nG+Q) that will affect the props is increased by 10%.

• Prop interval for slabs,

• Prop interval for beams,