With the same loading on both the 12" and 16" the push of the current would be equal on both floats because the same amount of the float below the waterline would be the same (length and with of both size float are the same) With the same loading the only difference would be that more of the 16" float would be above the water that the 12". I'd go with the cheaper float.
Hello JJ Here is an example of how to calculate the number of floats needed. Calculate the amount of floats needeed by multiplying the dock surface area (lenght X width) by 25 (for 25 lb buoyancy capacity per sq.ft). Divide this number by the choosen float buoyancy capacity (i.e. R-750 float has a 750 lb capacity) then round up to nearest pair amount. Make sure that all floats will fit underneath. Examples: 8' x 12' =96 96 x 25=2400 2400÷370=6,4 so, six R-370 8' x 12' =96 96 x 25=2400 2400÷750=3,2 so, four R-750 We hope this helps! Thank you for choosing Multinautic!
Actually you don't fasten them together, each float gets fastened to the dock. Hope this answers your question The Multinautic Team
Hi Dan, you would need to buy all the hardware to build a wood dock, however, if you go online Home Depot, we have ready-made Kits that include everything except the wood and model #19217 has the same Floats
Hi Bill, buoyancy means the floatability, the one you're asking about, 680lbs means it can take a weight of 680 lbs and will still be submerged. Hope this answers your question
Yes, you can attatch more than one of the floats together.
This float has a 680 pound buoyancy.