Dear all
We are designing 40 meter long column, there are 10 no. of platforms. At each elevation width of platform is not contact. It’s varying. i.e. A)0 – 120degree -> platform width is 1200 mm, then B)120-260 degree -> Platform width is 1500 mm. & c)from 260- 360 degree -> platform width is 1800mm. Height of platform is constant 1000 mm. & Force co-efficient = 1.2

Therefore, we have modeled platform is segment A, B, C.

Now while, computing wind area of platform, PV-Elite perform calc as below,
1. area of Segment A = 1200 x 1000 x 1.2
2. are of segment B , C accordingly.

Now, if we model, entire platform with maximum width 1800 mm from 0-360 degree
Then, compute, Wind Area = 1800 x 1000 x 1.2 x 2 (this 2 is considered when width of platform more then 180 degree)
This wind area is les then above computer wind area with segmental platform.

We think, PV-Elite missing the consideration of angle is it’s calculation.

With above comparison, we found that don’t model platform in segment, consider maximum width & perform modeling.

Pl. shares your view, if you have encountered in same issue.

From what been discovered above. I believe this is true

Please find attached .. my past design job which i just discovered from this issue.

We take example for Platform #1 which is 175°.
Area 1.1m x 1.5m = 1.65m². Wind @ elevation = 80.24 kg/m²
Force for one side of PF= 1.65*80.24*9.81= 1298N (this is what pvelite calculate.)

It is suppose to checked for max projected wind area which to make it more conservative it should take 2 sides.

Different case if i model it with more than 180° please see platform #12 = 1.2m X 1.1m = 1.32m² x 2 sides = 2.64m²

This will be serious issue for the tower. Plus we do have many jobs that requires for blast load. Projected area are so important to us..

DO HOPE MODERATOR TAKE ACTION ON THIS..
THANK YOU.

Please submit this query to tech support with these files and PV Elite input files. That is the proper channel to get support.

You can get the support email address from with in PV Elite help menu.

We will review it.

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Thank you.

Email sent.. thank you..

Dear Mr. Mandeep
pl. reply.