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Fiberglass Guardrails systems

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Hi,

What are the deflections limitations that you use for design Guardrails
when the material used is Fiberglass?

I have this:

1-Post deflection at top under a horizontal force of 900 N 
  should be less than h/40

2-Rail deflection at mid span under a horizontal force of 900 N 
  should be less than L/180

h = height of handrail
L = maximum spacing between posts

Could you make some comments on this issue?

Thank you,

Glauco de Deus Ribeiro
Civil Engineer


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