B-Line B297-18SS4 Eaton series strut fittings and accessories, 6.25" Height, 18" Length, 1.62" Width, 6.68lbs, Steel, Number of mounting holes (2) 9/16 in diameter (vertical), Bracket, Uniform load capacity 1100 lb, Stainless steel type 304

The B297-18SS4 bracket carries a uniform load capacity of 1100 lb. That is a uniform load figure, so it assumes the weight is spread across the bracket rather than hung at the far end of the 18 inch arm. Point loads at the tip of a cantilevered bracket load it much harder, so size accordingly when hanging a single heavy conduit run or a piece of equipment off the end.

It is Type 304 stainless steel, which is the grade normally specified for outdoor, damp and washdown environments where plain or electroplated strut hardware would rust. For chloride-heavy exposure such as coastal air, pool chemical rooms or de-icing salt, Type 316 is the usual step up. Match the bracket, the strut channel and the mounting bolts to the same stainless family so you do not set up galvanic corrosion at the joint.

Mounting holes are 9/16 in diameter, which is the standard strut hole size for 1/2 in bolts and hardware. Use 1/2 in stainless bolts with strut nuts or channel nuts rated for your load; fasteners are a separate order item, not supplied with the bracket.

Overall it measures 18 in long, 6.25 in high and 1.62 in wide, so on a standard cantilever mount you get roughly a foot and a half of usable arm off the mounting face. The 1.62 in width sits in line with common 1-5/8 in strut channel, so it lands cleanly on a strut face without overhanging the channel edges.

It is a cantilever-style strut bracket from the Eaton B-Line strut fittings and accessories line, used to carry conduit runs, cable tray, pipe, or equipment off a wall or a length of strut channel. You bolt it to the channel or structure through the 9/16 in holes and then hang your clamps, straps or tray hangers along the 18 in arm. Order the exact part as B297-18SS4.

Each bracket weighs 6.68 lb. Light enough for one person to set and bolt overhead off a lift, but worth counting into the dead load when you are running a long line of them on a single strut trapeze or on anchors into concrete or metal deck.