Concrete fishing pier deck help

I believe that you need more reinforcement.

Adding a wire mesh over the planned re-bar, would be better.

Have you did the calculation of the weight of this ?

There is tons of force on the center, and concrete has lots of compression strength, but is surprisingly weak in the tensile stretching area.

Commercial pre-stressed things are just that, they stretch the reinforcement, then pour the slab, and wait for curing, then release the reinforcement tension, which pulls the thing together tightly.

Think about installing I beams, or RR track, from pier to pier, as a support for your design.


ED

When we built our house 30 + years ago on grade concrete slab with a basement we were limited to a basement 14 ft. x any length with 8" thick concrete over that area and #4 rebar on a 12"x12" grid.



Has it survived any weight? You bet it has, some heavy weights. Would i do it again, in a heartbeat? Just do it, it'll be just fine unless someone convinces you to pour it stiff ( like these pitiful pictures ) so the mix isn't weakened.


Mix it with a slump a concrete pumper can pump and you'll be just fine. And if you don't have a vibrator spend some time vibrating the form sides with a hammer. You can't over do that with a hammer.:biggrin2:


Years ago i built myself a soil plate compactor and then i discovered it worked real well as a jitterbug.


EDIT: EDIT:


EDIT: EDIT:

Thanks for all the input My pilings were poured on the land in the form of a big H the legs are 14' long x 9.25" x 9.75" with a connecting cross member 48"wide between the legs x11" thick x 18" wide the legs were jetted down to an average of 7.5' below the mud line at 10' center only a couple inches of muck then a mixture of sand and shells. Each piling weighs 3525#. I have a small barge with a A frame handled them with no issues. Sry I don't have a picture I will take some next time I get back to camp. Also the concrete mix is a 3500# mix with fibermesh,plastizer,and a rust inhibitor I used for the piles. So SeniorSitizen you said you poured a span of 14' x ? at 8" thick with a 12"x12" with 1/2" rebar was the rebar a single lay and that's a clear span with no support in the center but was supported around all the sides by sitting on top of a wall? The deck will weigh 26-2700# @ 45"W x 10' L x 5.5" thick they will just sit on the cross members of each pile set I plan to pour 10 sections at a time then move them on site. I have no near by supplier for the fiberglass rebar here in La. but I have done the research on the product and it seams to be a great product. I am still searching though. Again thanks for all the the input and I have searching the web for info and looking at bridge deck construction where the average minimum thickness was 7.5" with rebar grid with spans of 8-9' for highway traffic I felt I would be good at what I was planning to do Guess I'll look for more input.
Thanks