Grates, Covers, Frames, Trash Racks, and Manhole Steps GRATES, COVERS, FRAMES, TRASH RACKS, AND 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 sheet s 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 S tandard 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 .
Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 403–404 of 1,331.