Potts050;489919; said:
Hey Chompers...ever notice Canadians have way too much time on their hands...
give me some feedback
- Thread starter crazy_cavi
- Start date
Hey Chompers...ever notice Canadians have way too much time on their hands...
I like the idea of a table like that. That would make life so much easier. The different influences on the the "trusses" should just somehow be taken into account. Please correct me if I'm wrong but: 150G would weigh in at round about 1300 odd pounds. Now 2' x 4' = 8sqr' ; 1300pounds/8sq' = 162.5psf or 1.128psi. The tank's load is a teeny bit more than the allowed live load relevant to your table.
The other factor I'm hesitant to use is your E (modules of elasticity). The charts I've seen ranges lumber between 1Mpsi and 1.9Mpsi. So I use 1Mpsi in my calcs. I just want to make sure my design will hold up, even if the lumber yard supplies me wiff poop wood.
I agree with using foam between the tank and the stand. Especially if it's a glass tank. This is a given with any tank I own. I'll never fill a tank without a polystyrene layer between it and the surface it's standing on.
As for your last paragraph...
no clue. Sound like good advice though.
I like yall's way of thinking. I just have one bit of advice. When designing timber structures you need to use the applicable adjustment factors. Some combinations of these factors will significantly reduce the design strength of your components.
crazy_cavi;487098; said:the tank is a 150g. and it is supported laterally with 2x4 construction studs sorry about the long wait in replying its just that i thought this post got forgotten because i checked it a day after and it was half way down the page already but neway thx
Now I could be wrong but a 150 gallon tank that has a 24"X48" base would be nearly 5 feet tall. The load on any table you put it on would be nearly 350 lb/square ft live load with monster fish, water, gravel and rockery.
Check your span tables but I wouldnt go smaller than three joists of double 2"X10" spruce construction grade lumber in your truss construction with at least a 1/2" plywood (marine grade if in the budget) membrane on top, for a tank four feet long and five feet tall. Simply support the ends, ie only the ends! Tanks although they look like rectangular boxes will bulge out on the sides and sag in the middle once full (slight but noticeable if you look down the edge or hold a four foot level along the side). If you try to support the middle, particularly on a tall tank you will introduce some uncalculable stress in the glass that you may explosively regret. More monster tanks have been destroyed by ill conceived stands than anything else I know of.
thats what i did im sorry im not a whiz or anything so i dont have any drawn schematics
but for the top i have 2x 48" 4x4's and 2x24"4x4 built into a frame just like they build houses....
and between them i have 6 14" legs making the stand 21" off the ground
frames are connceted to the legs with 5" lag bolts (drilled down an extra inch past the surface) and the stand is braced with 4x4 45` peices at every inside corner
and crossways with 2x4 where my shelves and doors are going to be
but for the top i have 2x 48" 4x4's and 2x24"4x4 built into a frame just like they build houses....
and between them i have 6 14" legs making the stand 21" off the ground
frames are connceted to the legs with 5" lag bolts (drilled down an extra inch past the surface) and the stand is braced with 4x4 45` peices at every inside corner
and crossways with 2x4 where my shelves and doors are going to be
