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mosalasi 1 28 04 59 43

7

darbast

Triangular Modular Formwork

Triangular Modular Formwork

mosalasi

Formwork frames with 100, 75 and 50cm dimension.  modular triangular formworks are the most common formworks for large and high ceilings. The triangular formworks could be mounted by use of quadratic section with 120x120cm dimension and/or with triangular section with 120cm of each side. The needed fittings parts are as follows. .Formwork frame .Oblique and horisontal anchor.Adjustment screw

 

lx≫ly=〖πr〗^3 t→π(〖2∙5)〗^3×(0∙25)=12∙27〖cm〗^4
A→π(r_2^2-r_1^2 )=π{(〖2∙5〗^2 )-(〖2∙25〗^2 )}=3∙73〖cm〗^4

R=0∙7×2∙5=1∙76cm
K=1 L=100cm

S=kl/r→(1×100)/(1∙76)=56.8

(kl/r<Cc)→fa=Fy/Fs [1-0∙5((kl/R)/Cc)2]

F∙S=1∙67+0∙37((kl/r)/Cc)-0∙125((kl/r)/Cc)^3=1∙82

Fa=2400/(1∙82) [1-0∙5((56∙8)/(131∙4))]=1195kg

P=Fa×A=1195×3∙73=4457kg≈4∙4ton