B-Line B297-30SS4 Eaton series strut fittings and accessories, 6.25" Height, 30" Length, 1.62" Width, 10.40lbs, Steel, Number of mounting holes (2) 9/16 in diameter (vertical), Bracket, Uniform load capacity 665 lb, Stainless steel type 304

The B297-30SS4 bracket is rated for a 665 lb uniform load. That is a uniform rating, so a point load hung at the free end of the 30 inch arm should be derated by the engineer of record. For heavier runs, gusseted or double-channel supports are the usual step up.

Yes. It is type 304 stainless steel, which is the grade normally specified for exterior, damp, and food or pharma washdown environments where plain or electroplated steel would rust. For chloride-heavy service such as coastal or pool chemical rooms, type 316 is the better choice.

The mounting holes are 9/16 in diameter, which takes 1/2 in bolts, threaded rod, or 1/2 in concrete anchors with normal clearance. Fasteners are not supplied with the bracket, so order the anchors, nuts, and washers separately, and use stainless hardware if you want to keep the corrosion rating of the 304 stainless bracket intact.

It measures 30 in long, 6.25 in high, and 1.62 in wide, and weighs 10.4 lb. The 1.62 in width matches standard 1-5/8 in strut channel, so it lines up with a 1-5/8 in channel run. Check that the 30 in projection clears ductwork, conduit racks, and any required working clearance in front of gear before you set the wall anchors.

It is a cantilever arm that bolts to a wall, column, or strut column and carries a horizontal run out from that surface: conduit racks, cable tray, small enclosures, pipe rollers, or trapeze crossmembers. With 30 in of reach and a 665 lb uniform rating in 304 stainless, the common application is multi-conduit wall racking in wet or corrosive rooms. Where you need support hung from a deck rather than off a wall, a trapeze built from strut channel and rod is the right approach instead.

It is solid stainless, type 304 material rather than a plated or painted finish over carbon steel. That matters on cut or drilled edges in the field, since there is no coating to breach and no touch-up paint needed if you trim or add a hole.

At 10.4 lb it is a one-person piece to place and hold, though drilling and setting a 30 in cantilever overhead is easier with a helper holding the free end level while the first anchor is tightened.