B-Line B234LHDG Eaton series strut fittings and accessories, 4.2" Height, 3.5" Length, 1.62" Width, 1lbs, Steel, Left hand four hole gussetted corner angle, 90 deg, Hot-dipped galvanized

The B234LHDG is a left hand four hole gussetted corner angle, so the gusset and bolt pattern are mirrored for one orientation of the 90 degree joint. Stand facing the inside of the corner: if the leg you are fastening runs off to the left, the left hand part is the one that sits flat against both strut faces. Mount the wrong hand and the gusset ends up on the outside of the angle instead of bracing it. Right hand joints take the opposite hand fitting, so on a run where you are bracing corners in both directions you need both hands.

The finish is hot-dipped galvanized over steel, which is the finish B-Line uses for outdoor, wet, and unheated locations such as rooftops, loading docks, tunnels, and exterior equipment supports. For dry indoor work a plain or pre-galvanized fitting is usually specified instead, but hot-dipped costs you nothing in fit, so it is a safe substitution indoors as well.

The B234LHDG is the fitting only, a single 1 lb steel angle. It has four holes, so a complete joint needs four fasteners: channel nuts (spring or plain) plus hex head bolts of the right length for your strut, or strut nuts with the bolt built in. Order those as separate line items, and match the fastener finish to the fitting if the joint is outdoors, since plain steel hardware in a hot-dipped galvanized assembly is the first thing to rust.

No. A gussetted corner angle cannot be flipped to serve the other hand, because the gusset sits on one side only and flipping it puts the web where the strut needs to sit flat. For the opposite hand joints order the right hand version of the same four hole gussetted corner angle. Ungussetted flat corner angles are symmetrical and can be used either way, which is why some installers stock those for mixed-direction work and reserve the gussetted hands for the loaded corners.

The gusset is the triangular web between the two legs. On a plain 90 degree angle, load at the corner tries to open or close the bend, and the plate itself is all that resists it. The gusset triangulates that bend so the joint holds square under load, which is what you want on cantilevered trapeze arms, wall brackets carrying conduit racks, and any corner taking a side thrust. If the corner only needs to locate two pieces of strut and carries little load, an ungussetted angle is the lighter, cheaper choice.

It measures 4.2 in height, 3.5 in length/depth, and 1.62 in width, and weighs 1 lb. The 1.62 in width is what matters most when you are planning a joint, since it tells you the fitting body stays within the face width of standard 1-5/8 in strut and will not overhang the channel edges.

Order it as B-Line B234LHDG. That is the full catalogue designation, part of the Eaton B-Line strut fittings and accessories line: B234 is the four hole gussetted corner angle, LH is the left hand, and DG is the hot-dipped galvanized finish. The equivalent right hand part carries an RH in place of the LH.

No certification is carried on the B234LHDG; it is supplied as a plain steel strut fitting for electrical support work. If your specification calls for a listed or certified support component for a particular application, that requirement has to be met by the system it is installed in rather than by this angle.