Patent ID: 7569775

Claim:
An elongated raceway base having a cross sectional shape with a flat rear wall for abutting a building structure wall surface, said raceway base having at least one forwardly projecting integrally formed web portion oriented generally perpendicularly to said flat rear wall portion, said web portion having an elongated leading edge, said flat portion having lines of weakening at spaced intervals along its length, said web portion having transverse slots provided at intervals corresponding to said lines of weakening, and said leading edge having a region of continuity without said transverse slots, whereby cutting said leading edge continuity region allows the installer to sever said base simply by cutting these continuity regions and flexing the raceway base to sever the rear wall portion, achieving a raceway base of reduced length, and said web portion leading edge defines oppositely directed flanges, and wherein said flat rear portion of said base has upper and lower marginal edges that are offset forwardly, and said flanges in said leading edge of said web portion defining upwardly and downwardly open top and bottom wireways, respectively.