GRATES, COVERS, FRAMES, TRASH RACKS, AND MANHOLE STEPS
PART 1 GENERAL
1.1SECTION INCLUDES
A.Grates, covers, frames, trash racks and manhole steps.
1.2RELATED SECTIONS Not Used
1.3REFERENCES
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
1.4DEFINITIONS Not Used
1.5SUBMITTALS
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
2.1GRATES, 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.
2.2MANHOLE 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
3.1INSTALLATION
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.
END OF SECTION
Grates, Covers, Frames, Trash Racks, and Manhole Steps
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 403–404 of 1,331. View official source ↗