Design Hardware 5"x1" Exterior Door Thresholds Ramp

Yes. The Design Hardware threshold is a 5 inch wide, 1 inch high extruded aluminum saddle with a ramped profile, so it sits under the door at the sill and gives a sloped transition on each side. The 5 inch width covers the sill and the door bottom with room for a sweep or bottom seal to land on the flat, and the 1 inch height sets how far the ramp rises off the finished floor.

Four lengths: 36, 48, 72 and 96 inches. A 36 inch piece suits a standard single door, 48 inches covers a wide single leaf, and the 72 and 96 inch lengths are for pairs of doors or storefront openings. It is 6063-T5 extruded aluminum, which cuts cleanly to the opening with a miter saw and a non-ferrous blade, so buying the next length up and trimming to the exact jamb-to-jamb dimension is normal practice.

No - they do different jobs. The Design Hardware 5"x1" threshold is a 6063-TS extruded aluminum saddle that spans the opening and carries the door sweep or seal at the sill. The Pemko 61 Series is an interlocking J hook threshold accessory in steel construction, meaning it is the hooked companion piece that a matching interlocking door bottom engages, not a standalone saddle. If the door already has an interlocking hook bottom, the 61 accessory is what mates to it; if you are setting a plain ramped saddle under an exterior door, the 5"x1" aluminum threshold is the part that goes down.

Two: Mill Finish and Dark Bronze, and both are offered in all four lengths (36, 48, 72 and 96 inches). Mill is the raw aluminum mill surface, the default on commercial openings and the one that blends with aluminum storefront. Dark Bronze matches bronze anodized entrances and dark painted hollow metal frames. If you are standardizing a building, pick the one that matches the door frames rather than the door itself.

Yes, and that is what the 72 and 96 inch lengths are for. Running one continuous extrusion under a pair avoids a seam at the centerline, which is where water and air get through when two shorter pieces are butted together. A pair of 3-0 leaves needs roughly 72 inches plus frame; measure the opening and take the 96 inch if the 72 will not reach, then cut to fit.

The threshold ships as the aluminum extrusion. Plan on supplying fasteners suited to your sill: concrete or masonry sills take sleeve or wedge anchors set in drilled holes, and a wood sub-sill takes flat head wood screws. Countersink so the heads sit flush with the walking surface. Set the threshold in a bed of sealant on an exterior opening so water cannot track under it.

Match on three things: width, height, and finish. This one is 5 inches wide and 1 inch high in Mill or Dark Bronze. If your existing saddles are also 5 inch aluminum, the new piece will sit at the same height and the doors will clear the same way, so you are not rehanging or undercutting anything. A different height changes the gap under the door and can mean the door drags or the sweep no longer seals, so measure an existing one before ordering for a fleet of openings.

6063-T5 is the standard architectural aluminum alloy used for storefront and entrance extrusions, tempered rather than raw, and it does not rust the way a steel saddle does when it sits in weather and road salt. That is why aluminum is the usual choice for an exterior sill on a building entrance. The trade-off is that mill aluminum will scuff and dull under heavy foot traffic; it holds its structure, it just stops looking new.