Choose a joist hanger whose internal width matches your joist thickness — common sizes suit 47 mm timber and depths of 50, 75, 100, 150 up to 250 mm. Measure the joist's width and depth and pick a hanger where the timber fits snugly in the shoe without side play.

Hot-dip galvanised or stainless steel joist hangers are suitable for outdoor decks, as their coating resists corrosion from moisture and treated timber. For exposed or ground-level decking, choose a heavier zinc coating or a stainless grade, and use matching corrosion-resistant nails or screws.

Joist hangers are fixed with dedicated joist-hanger nails or structural screws driven through every hole in the flange, into both the supporting beam and the joist. Fill all specified holes, as partial nailing greatly reduces the rated load, and use short square-twist nails into the joist face where required.

A joist hanger's safe load depends on its size, steel gauge and the number of fixings, so ratings are given per model rather than as a single figure. GeZu Impex lists the timber size and hole pattern for each hanger so you can match it to your span; always fill every nail hole to reach the stated capacity.