| Author | Message | ||
| Dave and Mel
Unregistered guest Posted From: 69.68.253.187 Rating: N/A |
Would baffles be needed in a 105 gallon fresh water tank? It's time to buy one for our "remodel" Also, our existing holding tanks for grey and black water are bulging, and empty. so it appears that it is permanent. The prior owner did not use plywood for support. When we put plywood around them now,should we put something around the tanks to prevent abrasion? | ||
| Bob greenwood (Bob_greenwood)
Registered Member Username: Bob_greenwood Post Number: 68 Registered: 7-2006 Posted From: 63.233.5.137 Rating: N/A |
are you talking about round or square tanks if they are flat on the sides,stack them next to each other with a piece of old carpet between them | ||
| David Hartley (Drdave)
Registered Member Username: Drdave Post Number: 663 Registered: 5-2005 Posted From: 67.78.176.54 Rating: N/A |
Large water tanks should have baffles if possible to aleviate sudden weight shifts when stopping and starting. That's 800 lbs of water....sloshing around. lots of intertial force. | ||
| John MC9 (John_mc9)
Registered Member Username: John_mc9 Post Number: 52 Registered: 7-2006 Posted From: 66.217.108.61 Rating: |
Re: "When we put plywood around them " It'd be easier (and probably serve the purpose as well), to just stand a 2x6 on end on each side, and use a cpl ratchet tie-downs around the tank and 2x6's (can use 'em lengthwise as well, for same results).. | ||
| R Fisher (Ranger)
Registered Member Username: Ranger Post Number: 2 Registered: 5-2006 Posted From: 65.19.246.49 Rating: N/A |
800# of water will not slosh because the tank would be full however 400# of water definately would. | ||
| Marc Bourget Unregistered guest Posted From: 64.142.42.176 Rating: |
JTNG, Except for the 2x6 (and that depends on how it's used) your suggestion will stabilize the corners, a little bit, but it won't do much for the bending loads - concentrated at the corners. Baffles, depending on how and where, will help with the loads but this sketchy discussion misses the point on the true and practical considerations for design of a tank. NO, I'm not "dissing" you. If you want to build the "perfect tank" then we should engage in a dialog. I am just commenting that more info on your recommendation would be worth while. Onward and Upward Marc Bourget | ||
| John MC9 (John_mc9)
Registered Member Username: John_mc9 Post Number: 56 Registered: 7-2006 Posted From: 66.217.108.117 Rating: |
Hmmmm... The thought was... why make a plywood box with the attempt to control the plastic bulge, when a simple reinforcement with 2x6 (or 2x4) will suffice?  We had a bulging tank in a Winnebago. Two 2x4s (one across each side) and a ratchet tie around the tank and 2x4s.did the trick. I sincerely doubt a plywood box will contain the bulge as well. (unless it's damned thick plywood) | ||
| Cliff (Floridacracker)
Registered Member Username: Floridacracker Post Number: 298 Registered: 7-2004 Posted From: 65.33.17.106 Rating: N/A |
John, I wrapped mine on all sides with 3/4 form plywood. Part for looks(painted to match gray bay interior), part for punture protection and part bulge protection. I think for bulge protection your idea would work fine. As a matter of fact both of ours are Proven methods.  Cliff (Message edited by floridacracker on August 11, 2006) | ||
| John MC9 (John_mc9)
Registered Member Username: John_mc9 Post Number: 57 Registered: 7-2006 Posted From: 69.82.158.243 Rating: N/A |
3/4" ply! Yeah man!! Anything that's thicker than plastic, should contain the bulge! | ||
| Marc Bourget Unregistered guest Posted From: 64.142.42.176 Rating: |
John, Just by scale you've portrayed about a 38" square tank. Won't stop the bending loads in the corners. No they won't fail quickly, but the likelyhood that they will is greatly increased. Baffles are a "twofer" in that they support the walls in tension and hopefully prevent rapid content shift that imposes the loads on those corners. Might work for smaller tanks with thicker walls. Marc | ||
| Dave and Mel Unregistered guest Posted From: 67.76.150.48 Rating: N/A |
OK, I think I see what you mean. I think that with plywood the load would be spread across the surface, however, it would be heavy! I'll have to take a look at our tanks when we pull them out to see the full extent of the problem. | ||
| David Dulmage (Daved)
Registered Member Username: Daved Post Number: 128 Registered: 12-2003 Posted From: 142.46.199.30 Rating: N/A |
I used two 35 gal. tanks side by side and interconnected. This works well for me. FWIW DaveD | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 867 Registered: 12-2000 Posted From: 64.231.202.113 Rating: N/A |
I'm with Dave. I am using two off the shelf 47 gallon tanks, approx 21 tall and 9 narrow, by 5 foot long, side by each and then insulated. Not as much push on the sides by being skinny. Lots of room to insulate and still fit under the tunnel in an MC8. I have to be able to protect from Canadian winter to get to and from Jack's party, and some future ski hill use. Also allowed me to get functional with one, with the other to be added in as cash and time allows. happy coaching! buswarrior |
