Ives FS438 Floor Dome Stop 1 3/8" Height

The Ives FS438 is a heavy-duty cast floor dome stop measuring 1-3/8" overall height with a 1-3/4" x 2" oval base, designed specifically for doors with thresholds and undercut doors where a standard-height wall or hinge-mounted stop can't intercept the door at the right point. Certified to ANSI/BHMA 156.16 (L12141 for brass and bronze, L32141 for aluminum), it ships with a replaceable gray non-marring rubber bumper, a wood screw, and a plastic anchor for floor installation. Available in satin chrome, oil rubbed bronze, bright brass, and black.

Why threshold and undercut doors need a taller floor stop

Most floor dome stops are designed for doors that sit close to the floor surface. When a door has a threshold, the threshold raises the door's lowest contact point off the floor. A standard 1" height floor stop positioned behind the threshold may sit below the door's travel path and fail to intercept the door before it contacts the wall or adjacent hardware. The FS438's 1-3/8" height provides the additional clearance needed to position the rubber bumper at the correct contact height above the threshold surface.

Undercut doors present a similar geometry issue from the other direction. A door with a large undercut has its lowest structural rail higher off the floor than a standard door, which means a low-profile stop may not make contact with any part of the door before the door swings past it. The FS438 addresses both conditions. The taller dome profile ensures the bumper is within the door's contact zone regardless of whether the floor-to-door gap results from a threshold below or an undercut above. For a 1" height option on standard doors without threshold clearance requirements, the FS436 is the companion model in the same series.

Cast construction, replaceable bumper, and ANSI certification

The FS438 body is heavy-duty cast construction in brass or bronze, with the cast aluminum option available for the satin chrome finish. Cast construction is denser and more dimensionally stable than stamped or pressed metal, which matters for a floor stop that takes direct contact loading from a door every time it swings open too far. The dome profile distributes that contact force across the rubber bumper rather than concentrating it on a sharp edge, which extends both the bumper life and the door finish.

The gray rubber bumper is designed to be non-marring, meaning it won't leave marks or scuff the door face on contact. It's also replaceable, which is a practical operational advantage in commercial facilities where bumpers wear out on high-traffic doors without requiring replacement of the entire stop. The R437 riser is available as a separate accessory for the FS438 when additional height adjustment is needed beyond the standard 1-3/8". ANSI/BHMA 156.16 certification confirms the stop meets commercial door hardware standards for material quality, mechanical performance, and finish durability.

Mounting, finishes, and installation notes

The FS438 ships with a wood screw and a plastic anchor for floor mounting. The plastic anchor is the correct fastener for concrete or masonry floors where a wood screw alone won't hold. For wood subfloor applications, the wood screw seats directly without the anchor. The base measures 1-3/4" x 2" oval, which provides a stable footprint without requiring a large floor preparation hole. The 9/16" base height keeps the transition between the floor surface and the stop body low, reducing the trip hazard profile of the installed unit.

Four finishes are available: US26D satin chrome, US10B oil rubbed bronze, US3 bright brass, and BLK black. Select the finish that matches the surrounding door hardware and flooring materials. For the full range of Ives floor stop options including the FS436 at 1" height and the FS18 security floor stop series, browse the Ives floor stops catalog. The complete floor stops section covers options from other manufacturers. For openings that also require a door closer to control swing speed and prevent the stop from being impacted at full force, those are available separately.

Select your finish and confirm the installation surface type before ordering. The FS438 is the 1-3/8" height model. Confirm the threshold height or undercut dimension matches this stop's contact zone before specifying.