Metallics JBWG14 Washer 1/4 Bar Joist Wshr Galv (Jar 100)

The JBWG14 is a 1/4 inch bar joist washer. It spreads the load of a 1/4 inch threaded rod or bolt against the angled web or chord of a steel bar joist, so hanger rod for conduit, cable tray, strut, or pipe can be anchored to the joist instead of to the deck. Galvanized finish, so it suits the overhead work electricians and mechanical trades do in open-ceiling commercial buildings.

It is sized for 1/4 inch rod or bolt. For 3/8 inch hanger rod, the common trapeze size for conduit and tray, you need the 3/8 version rather than this one.

They ship 100 pieces to a jar, packed as a single jar rather than loose or bulk boxed. That jar count is what you are ordering by, so one jar covers 100 hanger points at one washer each.

Different part, different job. A standard flat washer sits square and bears poorly against the sloped angle iron of a joist web, so the nut can cock and the rod hangs off-plumb. The JBWG14 is shaped specifically for bar joist angles at 1/4 inch rod, which is why it is sold as a bar joist washer and not a general flat washer.

No. The order is the washers only, 100 to a jar. You supply the 1/4 inch threaded rod or bolt and the nut to go with it, plus whatever hanger or clamp carries the conduit or pipe at the bottom end.

Yes, the washer is galvanized, which is the usual pick for parking structures, warehouses, and unconditioned mechanical spaces where plain steel would rust at the thread. For corrosive or wash-down environments, stainless hardware is the better call.