Total system weight capacity: 220 lbs. For a single door, the door must weigh under 220 lbs. For biparting, both doors combined must stay under 220 lbs. Over 220 lbs? See heavy duty hardware.
Door thickness: 1-3/8 in to 1-3/4 in. Outside this range? See heavy duty hardware.
Wall clearance beside opening: Must equal full door width on the slide side. Limited clearance? See bypass or bifold hardware.
Wall backing: Solid backing above the opening is required for track mounting: a 1×6 hardwood header board or solid wood blocking in the wall. Either one alone is enough. If there is no existing header or backing in the wall, we recommend installing a minimum 1×6 hardwood board (3/4 in thick × 5-1/2 in wide) that extends past the length of the track to the next stud or structural support point on each side. No solid backing and can't add a header board or blocking? See ceiling mount hardware.
Ceiling clearance above door: 6 in required. Less clearance? See straight strap (5 in) or straight top mount (5 in).
Door width: Your door must be wider than the rough opening. For standard rooms plan for 2 in of wall overlap on each side — opening + 4 in. For bedrooms and bathrooms, 3 in per side gives better privacy — opening + 6 in. Minimum functional overlap is 1/2 in per side. See our measuring guide for full sizing formulas.
Door height: Measure from finished floor to the top of the rough opening and add 1 in. The extra inch covers the top of the opening while leaving 1/2 to 1 in of clearance at the bottom for the door to slide without dragging. If you have thick carpet, check that clearance is adequate along the full travel path before ordering.
This kit's track is punched on 16″ centers so the holes land on studs, and it has no bolt at the end of the track. On most single-door openings that makes no practical difference. It starts to matter on biparting pairs, on long runs, and on doors over about 100 lb, where the steel past the last hole can deflect enough to see. We wrote up the measurements rather than asking you to take our word for it: when the end bolt matters and when it doesn't.