24" Composite Manhole Cover & Frame
Anti-theft BMC/SMC — zero scrap value, 60% lighter
24" round BMC/SMC composite cover and frame. Continuous-fiber and steel-mesh skeleton, AASHTO H-20 / D400 rated, with zero scrap value (theft-proof), non-conductive, signal-transparent, and corrosion-proof for sewer, salt, and chemical environments.
| Product Code | LZB-SMC-R24-D400 |
|---|---|
| Clear Opening | 24" (610 mm) |
| Overall Size | ~30" OD frame (760 mm) |
| Cover Thickness | ~1.5" (38 mm) |
| Material | BMC/SMC fiberglass-reinforced polymer |
| U.S. Material Equivalent | Continuous glass fiber + steel mesh skeleton |
| Load Rating | AASHTO H-15 to H-20 · C250 / D400 (size-dependent) |
| Assembly Weight | 99–132 lb (45–60 kg) — about 60% lighter than ductile iron |
| Surface Finish | Molded-in color and texture |
| Color Options | Black (standard); Gray, Green on request |
| Marking | Custom lettering and ID tags molded in |
| Application | Sanitary sewer, storm, electrical, telecom, smart-water vaults |
- · AASHTO M306 (proof-load tested)
- · EN 124 (composite reference)
Built to U.S. composite-cover requirements and tested per AASHTO M306. Falls under the lower (~7.5%) Section 301 tariff schedule vs ductile iron (~25%) — meaningful per-unit savings on bulk imports.
Why specify this
- ✓ ZERO scrap metal value — eliminates copper-style theft incentive
- ✓ 60% lighter than ductile iron — one-person service, lower injury risk
- ✓ 100% corrosion-proof — sewer gas, coastal salt, chemicals, de-icing brine
- ✓ Non-conductive and non-magnetic — safe for electrical and telecom vaults
- ✓ Signal-transparent — ideal for AMR / AMI smart-meter wireless reads
- ✓ UV stable — no degradation in direct sunlight
Composite covers solve the two failure modes ductile iron can’t: theft and corrosion. With zero scrap-metal value, they remove the financial incentive that drives the chronic theft of metal covers — a recurring cost for utilities nationwide. The BMC/SMC matrix is immune to the sewer-gas, coastal-salt, and chemical exposure that gradually eats iron over time, so service life in aggressive environments is dramatically longer.
For electrical, telecom, and smart-water vaults, the non-conductive and signal-transparent properties are decisive. Wireless AMR/AMI meter reads pass cleanly through the lid, and there’s no risk of stray current paths. Tariff classification is also more favorable than for ductile iron under current U.S. Section 301 schedules.
Tested per AASHTO M306 load requirements. Custom lettering, ID tags, and color tints available per RFQ.
More from Composite Covers
28"×32" Composite Round Cover with Frame
Mid-size composite cover for telecom and electrical vaults
24"×40" Composite Square Cover
Elongated composite cover for cable trench and pull boxes
Need LZB-SMC-R24-D400? Get a quote in 48 hours.
Share your project details — quantity, delivery terms, and any drawing or SPPWC plan reference. We confirm fit and pricing, direct from the factory.