Dorma 75220 3/4" Offset Hung Full Mortise Intermediate Pivot

The 75220 is rated for doors up to 660 lbs, which puts it in heavy-duty territory for thick solid-core, lead-lined, or oversized entrance doors. Intermediate pivots carry that load with the top and bottom pivots, so all three points need to be rated for the leaf you are hanging.

Fire rated, with a 3 hour rating. That is the spec an institutional or MRO buyer needs when the opening is on a rated corridor or stair enclosure, and it is where the 75220 separates from the standard-duty aluminum-door intermediate pivots like the Kaba Ilco IP-10 and IP-22 Series, which are not fire rated.

Yes, handing is required. The 75220 is offered left hand and right hand, and the two are not interchangeable on an offset hung door. Determine handing from the swing before ordering. If you want to avoid handing entirely on an aluminum opening, the Kaba Ilco IP-12 Series intermediate pivot is non-handed, though it is standard duty and not fire rated.

The 3/4 inch offset is the distance the door face sits out from the frame face, and it must match the top and bottom pivots already on the opening. A 3/4 inch offset door hung on 3/4 inch offset top and bottom pivots takes a 3/4 inch offset intermediate pivot, which is what the 75220 is. Mixing offsets on the same leaf will bind the door. The Ives 7215F is also a 3/4 inch offset pivot set if you are replacing the whole set rather than just the intermediate.

Full mortise. The 75220 requires a mortise prep in both the door edge and the frame, so it is a cut-in job on a new door or a matching existing prep. If you cannot cut the door, a full surface pivot such as the Hager 253 reinforcing pivot mounts on the face instead, but that one is not fire rated.

An intermediate pivot mounts partway up the door edge between the top and bottom pivots and shares the load, keeping a heavy leaf from sagging or racking. On an offset hung door the top and bottom pivots carry the swing; the intermediate carries weight. Heavy, tall, or high-traffic doors typically get one or more. The 75220 covers doors up to 660 lbs. Note it is the intermediate pivot only, not a complete pivot set, so the top and bottom pivots are ordered separately.

The Dorma 75220 is a full mortise intermediate pivot for standard doors, which means the door and frame have to be prepped to receive a mortised pivot body. Aluminum storefront and entrance doors are usually pivoted with hardware built for that stile and frame profile: the Kaba Ilco IP-10 Series, IP-12 Series and IP-22 Series are all intermediate pivot hinges made for aluminum doors and frames, and the IP-12 Series is non handed, which removes the handing call on a glass front opening where doors swing both ways across a run. Those three are standard duty and are not fire rated, so on an aluminum opening that carries a fire rating requirement they do not answer; the 75220 is heavy duty and fire rated for 3 hours but expects a mortise prep. Match to the door construction first.

Commercial, heavy duty, for standard doors. Rated to 660 lbs with a 3 hour fire rating, the 75220 is aimed at institutional and commercial openings rather than residential swing doors. It is a purely mechanical pivot with no electrical function, so it does not carry power through the door for access control or electrified trim.

The 75220 is a full mortise pivot for standard doors, not an aluminum-door pivot. For aluminum doors and frames, the Kaba Ilco IP-10, IP-12, or IP-22 Series intermediate pivots are the parts made for that application, and the IL-OP-10 Series is a 1/8 inch recessed pivot set for Arch and Vistawall storefront. Those are standard duty and not fire rated, so if the aluminum opening is on a rated wall the pivot choice needs to be confirmed against the door manufacturer's listing.

The Dorma 75220 is handed and is ordered left hand or right hand, in 605 bright brass, 613 dark bronze oil rubbed, 625 satin chrome and 626 finishes. On aluminum door and frame openings, the Kaba Ilco IP-12 Series intermediate pivot is non handed, so a single part number covers both swings across a run. The trade off is construction and rating: the IP-12 Series is standard duty and is not fire rated, while the 75220 is heavy duty, fire rated for 3 hours, and supports doors up to 660 lbs. On a mixed run where handing errors are the recurring problem and the doors are aluminum with no fire rating requirement, the non handed part removes the ordering mistake; where the door is heavy or the opening is rated, the handed 75220 is the one that meets it.

The Dorma 75220 is a heavy duty intermediate pivot supporting doors up to 660 lbs, which is well above a 200 lb leaf. In the offset pivot group, the Ives 7212 is a heavy duty brass offset pivot set with a top header mount rated at 200 lb capacity, and the Ives 7212V is the same 200 lb heavy duty brass offset pivot set with a jamb mount instead; both are fire rated. For a heavier leaf the Ives 7215 is the 500 lb capacity version with a header mount. The distinction between the 7212 and 7212V is where the top pivot lands, header or jamb, which is decided by the frame in front of you, not by the door weight. Note that the 75220 is the intermediate pivot on its own, while the 7212 and 7212V are pivot sets.

The Dorma 75220 is the intermediate pivot, the mid point pivot in an offset hung full mortise arrangement, so it does not carry the bottom of the door. The Hager 497 is a heavy duty bottom pivot hinge with ball bearing in forged bronze, full mortise, which matches the 75220 on mortise prep and heavy duty construction; it is not fire rated, so on a rated opening the bottom pivot has to come from a rated set instead, such as the fire rated Ives 7215 or 7215F offset pivot sets, which include their pivot components together. Confirm the offset dimension of the bottom pivot matches the 3/4 inch offset the 75220 is built to before pairing them on the same door.

Four finishes: 605 bright brass, 613 dark bronze oil-rubbed, 625 satin chrome, and 626 satin chrome. Each is available in both left hand and right hand. For a property manager matching a run of openings, 626 is the usual match for satin chrome lever and closer hardware, and 613 for dark bronze storefront and entrance sets.