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Solar panel support structure.

 
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ashishphadke
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Joined: 25 Jul 2009
Posts: 19

PostPosted: Tue Jan 16, 2018 2:10 pm    Post subject: Solar panel support structure. Reply with quote

Hello All,

I am about to start a solar panel turn key product.

Can anyone help me on what loads should be considered for the steel support structure of such
solar panel.

1. DL,
2. may be no LL?
3. may be no imposed load
4. WL??
5. EQ??
6. what else?

Thanks

Ashish Phadke.
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es_jayakumar
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Joined: 24 Nov 2011
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Location: Cochin

PostPosted: Tue Jan 16, 2018 3:46 pm    Post subject: Reply with quote

Dear Ashish,
I hope, the DL along with Wind Load can be critical. EQ load may not be crucial as the self weight is possibly not very high. It will be helpful, if you can post the sketch of the structure with dimensions.

E S Jayakumar
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srinivasa rao palla
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Joined: 13 Apr 2010
Posts: 6
Location: Hyderabad

PostPosted: Tue Jan 16, 2018 5:26 pm    Post subject: Reply with quote

Dear sir,

Please help me regarding solar panel mounting structure...

If it is cold formed steel what are the design parameters to be considered and if it is rolled steel what are the design parameters to be considered to  design the structure...

Thanks in Advance...
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Abishek_Siingh
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PostPosted: Wed Jan 17, 2018 6:27 am    Post subject: Reply with quote

Hi,

My thoughts on your query:

1. When using cold formed open sections, you have to follow IS 801 for the same and use allowable stress design.

2. When using hot rolled, as you know, we have to use IS 800-2007. some schools of though advocate on using AISC, AISI codes for the same, to which I agree. AISC codes are far more realistic and easy to use but people say that in India we should use Indian codes. I personally believe that apart from wind loading and earthquake loading (which are region specific-hence Is 875 and Is 1893), there should be flexibility of using whatever codes we want in steel design.

3. Try to avoid cold form steel as vertical members. Not that you cannot use, but the issue is that cold formed thin open sections used as column will have greater susceptibility to torsional buckling. We can use these as beam members because there is far more guarantee in resisting torsion and buckling either due to sheeting or due to various kind of bracings we have in plan. If you want to us closed thin sections as columns, then just be very conservative with calculations because site's erection capability generally doesn't commensurate with the designer's assumptions.

4. IS 800 2007 is loosely based on eurocodes which are tough to understand but you can refer the handbook by Nethercot which explain the laws nicely. (assuming that your structural steel basics are solidly in place).


Thanks and Regards,

Abhishek

srinivasa rao palla wrote:
Dear sir,

Please help me regarding solar panel mounting structure...

If it is cold formed steel what are the design parameters to be considered and if it is rolled steel what are the design parameters to be considered to  design the structure...

Thanks in Advance...
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Abishek_Siingh
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Joined: 18 Nov 2010
Posts: 609
Location: New Delhi

PostPosted: Wed Jan 17, 2018 6:31 am    Post subject: Re: Solar panel support structure. Reply with quote

Hi Ashish,

My suggestions in red below:

Abhishek

ashishphadke wrote:
Hello All,

I am about to start a solar panel turn key product.

Can anyone help me on what loads should be considered for the steel support structure of such
solar panel.

1. DL, 20 kg per square meter should be sufficient


2. may be no LL? Keep 57 kg per square meter (as per ASCE), if

                          you dont want to go for 75 kg/sq.m as per IS 875


3. may be no imposed load You will take atleast 30-50 kg/sqm as
                                         solar equipment selfweight.


4. WL?? Yes, because the solar panels will attract wind due to
    continuous surface area.

5. EQ?? Negligible.


6. what else? your Luck!

Thanks

Ashish Phadke.
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ashishphadke
SEFI Member
SEFI Member


Joined: 25 Jul 2009
Posts: 19

PostPosted: Thu Jan 18, 2018 2:40 pm    Post subject: Re: Solar panel support structure. Reply with quote

Kumar_Abhishek_Singh wrote:
Hi Ashish,

My suggestions in red below:

Abhishek

ashishphadke wrote:
Hello All,

I am about to start a solar panel turn key product.

Can anyone help me on what loads should be considered for the steel support structure of such
solar panel.

1. DL, 20 kg per square meter should be sufficient


2. may be no LL? Keep 57 kg per square meter (as per ASCE), if

                          you dont want to go for 75 kg/sq.m as per IS 875


3. may be no imposed load You will take atleast 30-50 kg/sqm as
                                         solar equipment selfweight.


4. WL?? Yes, because the solar panels will attract wind due to
    continuous surface area.

5. EQ?? Negligible.


6. what else? your Luck!

Thanks

Ashish Phadke.





Thank you very much Abhishek Ji. Wonderful information. Very useful.
Especially, the answer for the 6th question
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