Steel Structures and Indoor Pools
Steel Structures and Indoor Pools
(OP)
Do you give any special consideration for a steel structure that is housing an indoor swimming pool?
I have heard that chlorine can cause corrosion problems. Anybody ever dealt with this??
I have heard that chlorine can cause corrosion problems. Anybody ever dealt with this??






RE: Steel Structures and Indoor Pools
Never, but never question engineer's judgement
RE: Steel Structures and Indoor Pools
You have a few choices. You can galvanize the structural components. That will help, but won't stop it completely. You can provide post-erection painting with heavy coating of epoxy. That will help quite a bit. You can isolate the structure by using drywall and ventilation to protect the structure. You can use stainless steel structural components but probably too expensive for the application.
You can also consider a corrosion inhibition system, but keep in mind that the corrosion you will experience will have several forms, not just galvanic (which is helped the most by corrosion inhibition systems).
RE: Steel Structures and Indoor Pools
RE: Steel Structures and Indoor Pools
For a relatively low cost coating system that will provide some durability, you can use a product similar to Devoe/ICI 'DEVGUARD 4160' with a topcoat similar to Devoe/ICI 'DEVGUARD 4338'. For improved durability, this can be used in conjunction with a zinc rich primer.
An improved coating system can consist of a recommended primer in conjunction with a polyurea coating or a polyurethane with the former generally providing a better coating. Either of these will likely provide adequate protection for many years.
The hot dipped galvanising in conjunction with a polyurea or epoxy is near the upper end and will provide enhanced protection. You have to be careful with the topcoat on HDG; some coatings for a 'zinc soap' (saponification) that interferes with bonding the top coat.
With the exception of the first coating system, the other methods become more costly. Touching up polyureas is generally very good with the new coating chemically bonding to the substrate. Some epoxies and polyurethanes only bond mechanically to a roughened surface.
You can talk to some of the coating suppliers and get a better handle on some of the coating systems and relative costs.
Dik
RE: Steel Structures and Indoor Pools
The steel in question is pre-engineered metal building framing. The frames are long spans ( about 80 feet).
What is longest member length that can be hot-dip galvanized? There must be a length limitation.
RE: Steel Structures and Indoor Pools
As far as maximum lengths for HDG, you can check with your local galvanizing shop. But most of the time, the length is governed by the length of shipping since they can "double dip" a piece and essentially double the usable length of the kettle. I know 60 ft. is not a problem.
RE: Steel Structures and Indoor Pools
RE: Steel Structures and Indoor Pools
RE: Steel Structures and Indoor Pools
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A UK publication, but obviously the same principles still apply your side of the pond !!
VB
RE: Steel Structures and Indoor Pools
If you are using steel roof purlins then it is advisable to get ones with the bottom lip downturned.