Snap-on underfloor preset

Abstract

A preset insert construction is provided for a raceway system designed for placement in a concrete floor. A duct has an access opening defined in a top wall thereof. The access opening has a primary perimeter and a plurality of notches extending beyond the primary perimeter. A preset insert has an extension collar defining an insert opening therethrough similar in size and shape to the access opening. A support flange extends outwardly from a lower end of the collar. A plurality of locking tabs extend downward from the collar below the support flange. Each locking tab includes an outwardly extending locking lip portion. The locking tabs are located relative to each other in a pattern corresponding to the notches of the access opening, and are located on the preset insert so that when the tabs are initially inserted into the notches, the insert opening is partially out of alignment with the access opening. The preset insert is then moved relative to the duct to an aligned position wherein the insert opening is aligned with the access opening and the wall of the duct is located between the support flange and the locking lips of the preset insert. Resilient latching barbs are provided for automatically latching the preset insert in place relative to the duct when it is moved to its aligned position.