These tools give general guidance based on common industry rules of thumb. Always confirm load ratings and sizing against the hinge manufacturer's specifications and your local building code before buying or installing.
How it decides
Material sets the mounting style (strap and T-hinges for wood, weld-on or bolt-on barrel hinges for metal, broad bolt-on plates for vinyl). Weight sets the size and whether you need a third hinge. Coastal exposure forces 316. And a pool gate triggers a self-closing, self-latching recommendation, which is a code requirement in most areas.
Frequently asked questions
Why does a pool gate change the answer?
Pool barriers almost always must self-close and self-latch by code, and the chlorine environment calls for 316. Confirm your local code.
How many hinges for a heavy gate?
Three, to prevent sag and twist. Light gates can use two.