Quiet Glide library ladder rung describes this turned top rung designed for rolling library ladders in the Quiet Glide system. The alder construction ties in with wood ladder builds where an alder species rung matches the surrounding components. The overall length of 15-3/8 inches defines the span this rung occupies across the ladder sides, which matters when laying out stile spacing. The 1-1/4 inch diameter at the center creates the main hand and foot contact area, shaping how the rung feels when the ladder is in use. The turned down ends at 7/8 inch diameter transition the rung into the ladder stile bores, giving a defined shoulder between the center section and the mounting points. The unfinished alder surface leaves the rung ready for the finisher to apply stain or clear coats that coordinate with the rest of the ladder.
The overall length of 15-3/8 inches on this top rung signals how wide the ladder stiles need to be spaced, which influences the layout of a rolling library ladder frame. The 1-1/4 inch center diameter establishes the round profile where the user steps or grips, which shapes how the ladder feels in service. The turned down 7/8 inch diameter ends create a reduced section sized for stile holes, which helps define drilling diameters at the ladder sides. Each end being 1/2 inch long gives a clear tenon length, which relates directly to glue surface and shoulder seating against the stile faces during assembly.
This 16 inch top ladder rung sits in the Rolling Library Ladders product class, placing it within wood ladder builds that work with library applications. The term top rung connects it specifically to the upper position on a ladder, which shapes how it aligns with the upper ladder geometry. Being part of the Ladder Hardware category ties this rung to other mechanical components in a complete rolling ladder assembly. The alder description points to projects where alder ladders or alder trim are used, which helps maintain visual consistency along the ladder. The Quiet Glide brand association locates this part within the Quiet Glide rolling ladder family, which matters when selecting rungs that share the same labeled system.
The overall length of 15-3/8 inches gives a fixed distance between the turned ends, which allows repeatable rung spacing and stile parallelism when building multiple ladders to the same pattern. The 1-1/4 inch center diameter creates a uniform round profile from rung to rung, which supports consistent stepping feel as a user climbs or descends. The turned down ends at 7/8 inch diameter by 1/2 inch long define a clear tenon geometry, which simplifies boring ladder stile holes to a standard diameter and depth. That tenon shape also sets a shoulder at the transition, which helps seat the rung squarely against the stile face when pressed into place. The unfinished alder surface gives a raw wood substrate, which lets the finishing sequence treat the rung at the same time as the stiles and rails so color and sheen stay aligned.
The top rung has an overall length of 15-3/8 inches, which sets the spacing between ladder stiles and guides layout when building rolling library ladders.
The rung has a 1-1/4 inch diameter at the center, creating the main gripping and stepping area that defines how the ladder feels underfoot.
The turned down ends are 7/8 inch diameter by 1/2 inch long, forming a defined tenon geometry that relates to ladder stile hole sizing.
The rung is made from alder, which coordinates with alder ladder builds and matches other alder components in a rolling library ladder system.
The rung is described as unfinished alder, providing a bare wood surface ready for stain or clear finish during the ladder finishing process.
The part is identified as a top rung for library ladders, placing it at the upper ladder position in a Quiet Glide rolling ladder build.
This 16 inch top rung in unfinished alder combines a 15-3/8 inch overall length with a 1-1/4 inch center diameter and 7/8 inch turned ends, giving clear dimensions for ladder stile layout. The Quiet Glide branding and Rolling Library Ladders classification position it for use in Quiet Glide library ladder projects that call for alder construction and a defined top rung location. Using this specific QG.610.AD part number ties ladder builds to a consistent rung size and geometry across multiple installations.