Is this going to hold

damtrees420 · #1 07-19-2011, 01:39 PM

Its getting built from a buddys welding shop so only cost 80$ so im not to conserned about the money as its already cheap i think ill tell him to go 1 1/2 if they have that in stock or add some supports thanks for the input i knew it was going to be close glad I checked before i had a tidle wave tank for a few min as the tank its self is a bit of a gamble made out of 1/2 glass but has been reinforced and has held water for over a week now in the garage

BMW Rider · #2 07-19-2011, 02:13 PM

Part of the issue is going to be rigidity too. If the stand is able to rack even a little, the strength of the vertical members will drop drastically. I've no engineering experience, but my gut would have me adding in more coulums, probably a couple more on each side, and possibly a cross brace to keep it stable.

The Grizz · #3 07-19-2011, 03:40 PM

Definitely go with 1 1/2 tube, have 2 vertical members to split length in 3rds and if they build it right it will hold. And by build it right I mean, build the front and back frames first with 45 degree corners and then join them with the horizontal members. Doing this makes your corners bullet proof. You could add a knee brace into the backside of the stand just to be really on the safe side.

sphelps · #4 07-19-2011, 04:45 PM

Personally I would still suggest going 2" for the amount of weight. If you do use 1-1/2 then be sure it is actually HSS (structural steel, cold forged). If it's just hot rolled square tubing 1-1/2 is going to be pretty sketchy. As others have suggested extra columns is a good idea as well as adding angled supports at all corners to reduce the load on the joints and keep things square.

jorjef · #5 07-19-2011, 05:26 PM

Quote:

Originally Posted by sphelps

Personally I would still suggest going 2" for the amount of weight. If you do use 1-1/2 then be sure it is actually HSS (structural steel, cold forged). If it's just hot rolled square tubing 1-1/2 is going to be pretty sketchy. As others have suggested extra columns is a good idea as well as adding angled supports at all corners to reduce the load on the joints and keep things square.

Good point almost all tubing 1.5 or smaller isn't tested for yield and tensile with the exception Griz mentioned 188 wall. Personally I would worry more about the guy doing the fabricating. You could get the best materials but if the guy doing the work doesn't know what he's doing it could be a disaster