Montana Department of Transportation (MDT) · 2020 Standard Specifications for Road & Bridge Construction
Section 558 — Drilled Shafts
Montana 2020 Standard Specifications for Road & Bridge Construction, Section 558. Full text, cross-references and related pay items on BuildSpec.
SECTION 558 DRILLED SHAFTS 558.01 DESCRIPTION This work is constructing reinforced concrete shafts cast in cylindrically excavated holes that extend into soil or rock to support the structure and externally applied loads at the locations and to the lines and grades shown in the contract. 558.02 MATERIALS 558.02.1 Drilled Shaft Concrete Use Drilled Shaft Concrete for all concrete placed between the bottom of the shaft and the top of the casing, unless otherwise shown in the contract. Obtain the Project Manager’s approval before using a SCC mix design. 558.02.2 Permanent Drilled Shaft Casing…
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