Camp ground restroom facilities

[Houston Remodeler]

I am on a committee to build a new restroom / shower facility for a campground. The structure will rest on concrete piers, have beams and joists all supporting the plywood floor which will be completely waterproofed and tiled by yours truly.

My reference books on sizing of the various components is woefully out of date and would appreciate some guidance on the pier spacing, along with beam/joist size and spacing.

As with all volunteer efforts, they want this done as cheaply as possible and to last forever.

The proposed building is to be as drawn below; 22'x14' exterior measurements. Access will be by exterior stairs and a HC ramp.

Any other helpful suggestions will be appreciated.

[John Bridge]

Don't know where it's at, Paul, but I would want some engineering. Local engineering, that is.

[Houston Remodeler]

Hoyt Texas aka the middle of no where. (my apologies to the fine people of Hoyt, but I'm gonna guess this isn't the first time they've heard that.)


I can handle the piers if I know how many there need to be.

[Boilermaker 98]

Take it to your lumber yard and tell them to have their I-Joist supplier run it through the computer. They can also size any headers/beams you may need since you are spanning the piers.

You will need to tell them the live load lbs/sf and dead load lbs/sf and the deflection you want. Typical I-Joists are L/480.

Are you doing mud bed?

I am thinking you want a 75# LL and 35# DL if you are doing mud.

[Houston Remodeler]

I was hoping to skate by with plywood and Ditra, the showers will probably be one piece fiberglass units.

[az_rancher]

Campground bathroom/shower facility...

I would pour it all concrete, make it as nice as you can, no tile at all...

just my 2 cents

Rancher

[Boilermaker 98]

Use the 1" Advantech OSB for the sub-floor and then I would go with a 25# DL.

[Shaughnn]

I agree with John, mostly. Why not pour the foundation, complete with pitches to shower drains. Throw down Dal 2-by-2 and some epoxy after waterproofing/ antifracture everything with Hydroban. No curbs, no worry of deflection and no concern about carpenter ants or other critters.
Shaughnn

[Houston Remodeler]

This is on a fairly steep hill to use some of the area where a tent or camper cannot go, and have good positioning for the septic field.

The piers will rise out of the ground between 2 and 4 feet. If we poured a concrete slab in the air, the framing for the concrete would be greater than building a wood floor alone. Personally I'd love to pour a suspended slab pitched to the floor drains but that ain't happenin'. We are stuck with piers and a wood frame.

[silvercitytile]

just dont mix up the Girls sign with the Guy's

[Houston Remodeler]

I'm sure the ladies facility will have gold faucets, air conditioning, massage tables, and an espresso bar.

[tileguynky]

Paul, that would certainly explain the waiting line for the women's restroom.
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[Houston Remodeler]

Ok so this is what I have so far;

12 piers, in 3 rows of 4

Beams are double 2x10's 7 feet on center

Joists are single 2x20's 16" oc

3/4" plywood

2x4 balloon framed walls

Roof joists & rafters 2x6 @16"oc

Sound right?

[lasvegaslenny]

Paul,

You could lose ADA bathroom just make it an accessible stall and have the two sinks in a wall hung vanity setup so they are ADA compliant.

Also dont know if you have to meet code but around here if you have more than one toilet you will need floor drains in there.

And what about a mop sink. You could put one in the utility clost with your HWH abouve ona platform.

[chuck stevenson]

Paul,

I understand the structure is on a slope.

Move some dirt around and do a monolithic pour with floor drains as others have suggested.

This may be beyond your scope of work but should be considered.