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Old 01-23-2005, 08:03 PM
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Default Materials for Sea Wall Construction

Background:* Our development has a small boat basin that contains 50+ slips and ~800 LF of sea wall.* Original sea wall construction was pressure treated lumber installed in 1978.* The HOA has been pretty good about making repairs when needed, but storms, age and salt have taken their toll.* We have hired an engineer skilled in this type of work to make recommendations, but replacement is inevitable, just a matter of how much has to be replaced and how quickly.

One solution being considered is to install a new wall just inside (meaning to the water side) the existing wall.* Since the wood preservatives have changed and the estimated life of a wood wall is now only +/- 15 years, we want to look at other materials with a longer life.* One that looks promising is fiberglass sheet piles.* This looks like a very nice system that is only marginally more cost than wood and significantly less than concrete.* In particular, we are looking at a product from Lee Composites in Houston.* Their web page shows many installations since '93, including Pirates Cove.

Any THT'er's had personal experience with this product or similar ones?
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Old 01-23-2005, 08:48 PM
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Default RE: Materials for Sea Wall Construction

Are you shure that it's fiberglass and not PVC?

I had a vinyl bulkhead installed about a year ago. Material warrantee is 75 years and I am looking forward to the day I see it expire.

Mine is C-lok 9400

Shoregard is another big one. Northstar also looks good, in fact that was my first choice, until the neighbor used the C-loc. I went with the same brand so I could just connect right up where his left off.

I am not sure who owns who now, I think some or all of the three I just mentioned have merged, or bought one another.

I believe it is all pretty much the same stuff. It drives in very quick and easy. Yes it costs a little more than wood, but the contractors more than make that up in labor.
As I said it goes in FAST. If anything it should cost less because of the labor savings, but it does not.
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Old 01-23-2005, 09:01 PM
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Default RE: Materials for Sea Wall Construction

I am president of a marine contracting company on the Jersey Shore, you are a tad too far away for us, but go to our website and there are links to Northstar and C-Loc, both are good products and we use them interchangeably for individual projects, depending on who can supply fastest at the time. Both come in different weights (strength) and remember to use sheets that are long enough, short sheeting is an old trick in the marine contracting business to produce a cheap estimate...our website is www.lechard.com there are some pictures and details of some batter style seawalls, that are heavy duty....

Dave
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Old 01-24-2005, 08:20 AM
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Default RE: Materials for Sea Wall Construction

On the subject of short sheeting, local practice for bottom conditions here calls for just as much sheet under the bottom as there is exposed wall above it, The city has to approve the plans and they will not approve less than that. I have 22' sheets for 10 feet of water.

That being said, The contractor at my neighbor's house used 14' sheets for the same waterdepth.

Dave is right, watch them like a hawk, and make sure the materials they use are the same as they quoted.

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Old 01-24-2005, 11:47 PM
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Default RE: Materials for Sea Wall Construction

Never seen anything but concrete around here. I'd like to see other styles, but I have to wonder if they would be approved for use here. Are you talking about salt water?
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Old 01-25-2005, 08:27 AM
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Default RE: Materials for Sea Wall Construction

Yes, Saltwater, or any water for that matter. I am sure you have it locally, it is everywhere. If you look at it, you might even think it was concrete. It can be the same color.

Google "Vinyl Seawall" and you should get plenty of info or look at the website listed above in Dave's post. He has some good links and pictures.
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Old 01-25-2005, 11:18 AM
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Default RE: Materials for Sea Wall Construction

They are re-doing the seawalls at the marina where I keep the Snow Shovel. They are using some kind of sheeting (don't know if it is fiberglass or some kind of plastic). Making a new wall about a foot from the old one and running parrellel. They're filling the space between the walls with fill dirt, and then going to put a deck "cap" on top. This should fix their errosion problem.
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Old 01-25-2005, 08:48 PM
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Default RE: Materials for Sea Wall Construction

All of our construction is done on open salt water or saltwater lagoons. Construction techniques vary as to location, in our website, the batter style shown is for open water, where the exposed bulkhead is subject to heavy wave action. In lagoons of shallow depth, bulkheads with no exposed face piles can be built.

There are now materials to replace all of the wood in a traditional bulkhead or seawall. Vinyl sheeting as well as fiberglas for the whalers (horizontal "stringers" on the face of the bulkhead) as well as screw type anchors for behind the wall to replace the traditional "deadmen" that relieve the forward force on the bulkhead.

There will be some new additional photos of seawalls etc on the website shortly, we are rebuilding one of our marinas with Northstar vinyl sheeting and no face piles as well as a new travelift pit at one of our other locations...

.....that is if Barnegat Bay thaws out, the cold and ice is killing us.....

Dave
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Old 01-25-2005, 10:21 PM
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Default RE: Materials for Sea Wall Construction

Ocean Isle Beach is trying to decide what to do w/ our concrete canal walls. The town works w/ Jeff Troutman @ Criser & Troutman, Engineers in Wilmington. He has recommended vinyl. The town had a presentation from Bob Lee @ Lee Composites.*From my notes I have that they did the Masonboro Harbor Marina using C D York Co from Morehead City.

If any of you have some good photos of your bulkheads I would love for you to send them to me @ tarnold@nc.rr.com*
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Old 01-26-2005, 08:02 AM
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Default RE: Materials for Sea Wall Construction

Vinyl seawall, probably over 400', at my marina. Our research has shown that steel has gotten good reviews from other marina operators, but steel prices are VERY high right now. I haven't seen or spoken to anyone with fiberglass.

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Old 01-26-2005, 08:07 AM
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Default RE: Materials for Sea Wall Construction

Here's another shot of our vinyl seawall. I believe to be ~10yrs old. The only problem I can see with it is that it is reinforced with pressure treated, which has a lifespan of ~15yrs in water, which certainly is a limiting factor.

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