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Top Line Grant Apron 7138 is a cold rolled steel apron from Hettich America Corporation designed for bypassing sliding door hardware setups, so it supports doors that pass in front of or behind each other on tracks. The apron is specified for 1-3/8 inch door thickness, which matches common interior sliding door stock and helps standardize milling and layout. A 1-1/8 inch offset is built into the apron, positioning the door correctly relative to the track line so bypassing panels clear each other in operation. The zinc plated finish on the apron provides a coated steel surface that helps the component stand up to typical interior shop and jobsite environments. Manufacturer part number 50565 ties this apron directly to the Top Line Grant 7138 system description, which helps align ordering with existing project specifications.
This apron uses a side mounting design, so it fastens into the door edge rather than the face, which keeps hardware lines tight and helps maintain a clean door surface. The 1/4 inch vertical adjustment built into the apron gives room to shift the door up or down after hanging, which helps correct for small framing variations and track placement tolerances. With a defined door thickness of 1-3/8 inch, the mounting line is predictable, so hinge-edge work and track alignment can be laid out consistently from one door to the next. The specified headroom range from 1-7/8 inch to 2-1/8 inch above the door sets a clear working zone for placing tracks relative to the apron position.
This apron is specified for bypassing sliding door hardware, so it fits projects where doors share an opening and slide past each other on tracks. The 1-3/8 inch door thickness specification targets interior doors and panels built from that stock size, which keeps fabrication straightforward in cabinet or light residential work. Its headroom requirement of 1-7/8 inch minimum to 2-1/8 inch maximum places the working space for the track just above the door top, so the apron participates in a compact overhead assembly. Because the apron mounts to the side of the door, it suits situations where the door face needs to stay clear for finishes or design elements while still tying into the sliding system.
The 1-1/8 inch offset built into this apron positions the door relative to the track, which helps maintain consistent overlap where bypassing doors cross each other. That fixed offset simplifies repeatable layout when multiple openings use the same hardware set. Vertical adjustment of 1/4 inch lets installers dial in door height against floors and headers, which supports smooth sliding without dragging or excessive gaps. The cold rolled steel body gives the apron a stable form that holds the set position under normal sliding loads, which supports long-term alignment of the door within the bypassing system. The zinc plated finish on the steel adds a functional coating that withstands routine handling during fabrication and installation, supporting a clean fit between the apron and other sliding hardware components.
Top Line Grant Apron 7138 is specified for 1-3/8 inch (34.9 mm) door thickness, so it matches doors built from that stock and keeps the side mounting line consistent.
The apron provides 1/4 inch (6.4 mm) of vertical adjustment, allowing the door height to be fine-tuned relative to the head and floor for smoother bypassing movement.
The apron is specified for headroom from 1-7/8 inch (47.6 mm) minimum to 2-1/8 inch (53.9 mm) maximum, defining the working space for the sliding track above the door.
Top Line Grant Apron 7138 uses a side mounting configuration, so it attaches to the door edge and leaves the main door faces open for finishes.
The 1-1/8 inch offset positions the door in relation to the track, helping bypassing doors clear each other and maintain consistent overlap in operation.
The apron is made from cold rolled steel with a zinc plated finish, providing a solid metal body with a protective coated surface for typical interior use.
Choose Top Line Grant Apron 7138 when a bypassing sliding door layout calls for a 1-3/8 inch thick door and headroom between 1-7/8 inch and 2-1/8 inch above the panel. The side mounting design, 1/4 inch vertical adjustment, and 1-1/8 inch offset give defined geometry for repeatable installs. With cold rolled steel construction and a zinc plated finish, this Hettich America Corporation apron aligns with sliding door hardware needs in the Builders Hardware and Sliding Door Hardware classes.
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