Dorma 75240 3/4" Full Mortise Offset Brass Right Hand Intermediate Pivot For Lead-Lined Doors 1-3/4" Thick, Satin Chrome

Yes, it's handed. The 75240 comes as either LH left hand or RH right hand, and the two are not interchangeable on an offset hung door. Stand outside the opening, on the side the door swings away from: if the hinge edge is on your right, you need the right hand version. Getting this wrong means the pivot leaf points the wrong way and won't mortise into the door edge.

Fire rated, with a 3 hour rating. That makes the 75240 usable on 3 hour labeled openings, which matters on hospital corridor and shaft doors where lead-lined leaves often sit. Among the offset pivot options, the Ives 7215F and 7212 sets are also carried as fire rated, while the Hager 253 and 497 pivots are not.

The Ives 7215F is the nearest peer for a fire rated 3/4 inch offset application. It is a stainless steel 3/4 inch offset pivot set with a top header mount rated to 500 lb and carries a fire rating, while the Dorma 75240 is a brass 3/4 inch full mortise offset intermediate pivot rated to doors up to 660 lbs with a 3 hour fire rating. The difference to weigh is scope: the 7215F is a complete top and bottom pivot set, where the 75240 is the intermediate pivot that carries load between the top and bottom pivots on a tall or heavy leaf.

No. The Hager 253 is a full surface reinforcing pivot made to work with 4-1/2 inch wide hinges on a 1-3/4 inch door, zinc plated, heavy duty and not fire rated. It reinforces a butt hinge hung door rather than carrying an offset hung leaf. The Dorma 75240 is a full mortise offset intermediate pivot for offset hung doors, brass, with a 3 hour fire rating. If the door swings on butt hinges, the 253 is the right part; if it swings on offset pivots, it is not.

It's a full mortise pivot, so the leaves recess into the door edge and the frame rather than surface applying. Plan on routing the mortise pockets during door prep, which on a lead-lined leaf means coordinating with the door manufacturer before the lead is installed. If your opening is already drilled for surface mounted reinforcing, a full surface unit like the Hager 253 is the different approach, though that one is not fire rated.

Count depends on door height and weight, and each 75240 is sold as a single handed intermediate pivot rather than a pair. On tall or very heavy lead-lined leaves it's common to run two intermediates between the top and bottom pivots. Order every one of them in the same hand as the door, since left hand and right hand are separate items.

It's satin chrome, 626 in BHMA terms, which is the most common commercial finish and will sit alongside satin chrome closers, exit devices, and levers without looking off. The model designation reads 75240 RH 626 for the right hand version. Since the pivot is largely concealed in the mortise once hung, the finish is mostly about the exposed knuckle at the door edge.

Purely mechanical. There is no electronic component, no wiring, and no power transfer through this pivot, so it does nothing for access control or electrified trim. If the opening needs power carried to the door leaf, that has to come from a separate electric hinge or door loop.