Struggling to Calculate Wind Load on a Double-Pitch Roof Hall Using Eurocode – Can Anyone Help 1

[ivogljivo]

Hi everyone,

I’m a young engineer working on a project where I need to calculate the wind load for a hall with a double-pitch roof. I’m based in Europe, so I have to follow Eurocode (EN 1991-1-4) for the calculations. The problem is, the specific shape of this roof isn’t directly covered in the Eurocode, and I’m having trouble figuring out the best approach.

I’m considering approximating the roof as either a cylindrical shape or a duo-pitch roof (as shown in the pictures I’ve attached) to simplify the calculations. However, I’m not entirely confident this is the right way to go, and I’m worried about inaccuracies.

Has anyone dealt with a similar situation or have any advice on how to approach this? Any tips, formulas, or references would be incredibly helpful!

Thanks in advance for your help – I really appreciate it!

 

[ANE91]

ASCE 7 uses data from a bunch of wind tunnel tests for a variety of roof shapes. Start with Chapter 26. This is basically a mansard. You should be able to bound the problem with a dome.

 

[ivogljivo]

ASCE 7 uses data from a bunch of wind tunnel tests for a variety of roof shapes. Start with Chapter 26. This is basically a mansard. You should be able to bound the problem with a dome.

thanks for reply but I cant use ASCE as I am in Europe we use Eurocodes

 

[ANE91]

Wind is the same in Europe as it is in the US. The principles in ASCE 7 are sound. If your code doesn’t give you the tools to build this specific building in your country, then make a case to your building official for using ASCE 7.

The reliability theory is ultimately all that’s different. I’m not saying the codes are fungible; I’m saying that wind is wind and pressure is pressure.

 

[HTURKAK]

I’m considering approximating the roof as either a cylindrical shape or a duo-pitch roof (as shown in the pictures I’ve attached) to simplify the calculations. However, I’m not entirely confident this is the right way to go, and I’m worried about inaccuracies.

Your approach is reasonable.
- Approximate assuming Vaulted roof ( 7.2.8 )
- Duopitch roof with steep pitch angle , ( 7.2.5)
- Duopitch roof with shallow pitch angle
For each element ,( wall , roof , or overall structure ) take the more stringent assumption.