MANHOLE STEPS
Part 1 — General
1.1 Section Includes
A.Grates, covers, frames, trash racks and manhole steps.
1.2 RELATED SECTIONS Not Used
1.3 References
A.AASHTO M 31: Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
B.AASHTO M 111: Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
C.AASHTO M 199: Precast Reinforced Concrete Manhole Sections
D.AASHTO M 270: Carbon and High-Strength Low-Alloy Structural Steel Shapes, Plates, and Bars and Quenched-and-Tempered Alloy Structural Steel Plates for Bridges
E.AASHTO M 306: Drainage, Sewer, Utility, and Related Castings
F.ASTM A 536: Standard Specification for Ductile Iron Castings
G.ASTM D 4101: Polypropylene Injection and Extrusion
H.AWS D1.1: Structural Welding Code - Steel
1.4 DEFINITIONS Not Used
1.5 Submittals
A.Shop drawings for cast iron alternative to steel grates and frames, for review.
B.Manhole step manufacturer’s product data sheets and installation instructions for information. Grates, Covers, Frames, Trash Racks, and Manhole Steps
Part 2 — Products
2.1 Grates, Covers, Frames, and Trash Racks
A.Refer to the DB and GF Series Standard Drawings.
1.Structural Steel
a.AASHTO M 270, Grade 36.
b.Fabricate according to AWS D1.1
c.Hot-dip galvanize after fabrication according to AASHTO M 111.
2.Gray Iron.
a.AASHTO M 306, Class 35B.
3.Ductile Iron.
a.ASTM A 536 Grade 80-55-06.
2.2 Manhole Steps
A.Refer to AASHTO M 199 and GF Standard Series Drawings.
1.Steel Rod
a.AASHTO M31, Grade 60.
2.Copolymer Polypropylene Plastic
a.ASTM D 4101.
Part 3 — Execution
3.1 Installation
A.Provide a firm and even bearing surface on the frame so that the grate or cover will not rock under the influence of loading.
B.Install according to manufacturer’s instructions. Grates, Covers, Frames, Trash Racks, and Manhole Steps
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Source: Utah Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 397–398 of 1,311. View official source ↗