Construction site hoarding with access gate according to Eurocode 1

[TWfea]

Hi everyone, I am working on a hoarding design (approx 100m long), and I have to include an access gate in the centre. I am applying Eurocode 1, section 7.4,.1 (free standing walls and parapets)

I was wondering how others deal with the wind load zones (A,B,C,D) at access points. The normal position of the gate is closed (and is the default position during a high wind event) so I would assume that applying zone D wind coefficient was fine. But if anyone out there has any feedback or a different approach I would really like to hear it, particularly any past experience!

I also have a related question that has popped up a few times on the definition of a "return corner"

1. The Eurocode illustrates a 90deg corner return, but if we have a 45 deg corner return this should go some way to counter the end effects, but should i handle this.
   • Should I treat the 45-degree return as an end since it's less than 90 degrees?
   • Or should I interpolate between the "no return corner" coefficients and "return corner" coefficients?

If you need any more detail, just let me know!

 

[HTURKAK]

so I would assume that applying zone D wind coefficient was fine. But if anyone out there has any feedback or a different approach I would really like to hear it, particularly any past experience!

You cannot apply zone D for the whole wall. You are expected to assume the gate is open and design for two separate walls and apply zones A,B,C,D

The Eurocode illustrates a 90deg corner return, but if we have a 45 deg corner return this should go some way

Pls provide a sketch . You are expected to consider different wind directions . Figure 7.19 shows that , max load occurs at 45 degr. skewed wind direction.

 

[TWfea]

Hi HTURKAK, here is a sketch, with 3 scenarios the highlighted one is the one I mentioned earlier, and the others are from the Eurocodes. as mentioned earlier, we have a situation in between the examples provided in the eurocode.

The Eurocodes do allow for interpolation if the return corner length (L) is less than the hoarding height (h). So I was thinking that the coefficients could be interpolated values based on the effective length of the return corner, i.e. cos(45)*L. Would like to hear you thoughts on this.

 

[Martin Gillie]

You cannot apply zone D for the whole wall. You are expected to assume the gate is open and design for two separate walls and apply zones A,B,C,D

Pls provide a sketch . You are expected to consider different wind directions . Figure 7.19 shows that , max load occurs at 45 degr. skewed wind direction.

If the gate is typically closed, I think it would be reasonable to consider the open situation an Accidental load case with reduced partial factors.

 

[HTURKAK]

If the gate is typically closed, I think it would be reasonable to consider the open situation an Accidental load case with reduced partial factors.

OK.. then pray that the client will not change the gate to bar gate in future.
Always remember Murphy's Laws;
If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong.

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