B-Line Eaton series beam clamps, 800 lb, Safety factor of 5, Right angle clamp, 7, Stainless steel type 304

The B422-3SS4 right angle beam clamp is rated for 800 lb, and that rating is published with a safety factor of 5. So the working load is the 800 lb figure, not the ultimate strength. For runs of conduit, cable tray hangers, or trapeze supports, total the hanging weight per attachment point and keep each clamp under 800 lb.

It is Type 304 stainless steel, which is the grade specifiers call for on exterior, damp, and wash-down work where a plain or electro-galvanized clamp would rust. For chloride-heavy environments such as coastal exposure or pool chemical rooms, engineers commonly step up to Type 316 instead, so check what your spec calls out before substituting 304.

Yes, it carries a cULus Listing, which covers it for both US and Canadian installations. That matters on inspected commercial and institutional jobs where the AHJ wants listed support hardware for conduit and cable runs rather than generic structural fittings.

Published size is 4 in height, 3 in length/depth, and 4.875 in width, at 1.11 lb per piece. Use the 4.875 in width figure when you are checking clearance against adjacent beam flanges, fireproofing, or a tight ceiling cavity, since that is the largest footprint dimension.

Order Eaton B-Line part number B422-3SS4. The SS4 suffix is the Type 304 stainless version of the B422 series right angle clamp. Give that full number to your distributor; the plain B422 without the suffix is a different material.

What ships is the clamp itself, one piece at 1.11 lb. The threaded rod, nuts, washers, and whatever hangs below it (conduit clamp, strut, tray hanger) are separate line items, so add them to the order if you are building the whole assembly.

Keep the whole assembly in the same material family where you can. Pairing Type 304 stainless hardware with zinc or galvanized rod puts dissimilar metals in contact, and in a wet or exterior location that accelerates corrosion of the coated part, which defeats the reason for specifying stainless in the first place. If the B422-3SS4 was chosen for a corrosive area, run stainless rod and nuts with it.