Illinois Department of Transportation (IDOT) · Standard Specifications for Road and Bridge Construction
Section 815 — GULFBOX JUNCTION
Illinois Standard Specifications for Road and Bridge Construction, Section 815. Full text, cross-references and related pay items on BuildSpec.
Gulfbox Junction Art. 815.04 695 Note 1. Gradation CA 6 shall be used. Note 2. Class SI concrete shall be used. CONSTRUCTION REQUIREMENTS 815.03 Installation. The location of the gulfbox junction shall be excavated so that the top of the gulfbox is set flush with the sidewalk or paved surface. When installed in earth shoulder away from the pavement edge, the top surface of the gulfbox shall be 1 in. (25 mm) above the finished grade. The excavation shall be deep enough to accommodate the depth of the box and the base. When the gulfbox is to be constructed over existing conduit, the conduit…
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