Cast Iron Manhole Covers & Frames
Cast iron manhole covers and frames by EMCO Wheaton — lay-in, bolt-down, and monitoring configurations for roadway, sewer, and utility access. · 12 products
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About Cast Iron Manhole Covers & Frames
Why Cast Iron Is Still the Standard
Composite and plastic covers have their place, but cast iron remains the default specification for any installation where load-bearing capacity is non-negotiable. Municipal roadways, parking lots, facility access points — cast iron handles the weight without cracking, warping, or settling out of position over years of service.
Our cast iron covers come from EMCO Wheaton, whose products are installed in municipalities, military bases, and industrial facilities across the country. Every cover is designed for the specific load and environmental conditions of its rated application.
Frame Options
Poly skirt — Lightweight polyethylene frame. Ideal for non-traffic areas: monitoring well access, landscaped utility areas, and residential installations where the cover won’t bear vehicle loads.
Steel skirt — Heavy-gauge steel for maximum structural integrity. Anchors into concrete or asphalt and distributes vehicle loads across the frame. This is the roadway-grade option.
Lid Configurations
- Lay-in — Standard. Lid drops into the frame for easy access. Most common for routine inspection points.
- Bolt-down — Tamper-resistant. Required for secured facilities and locations where unauthorized access is a concern.
- 3/8” lay-in — Thinner lid option for lighter-duty applications.
Available Sizes
Round covers from 6” to 24” diameter. Frame depths from 5” to 24”. If you’re replacing an existing cover, match both the opening diameter and frame depth to ensure proper fit.
Related Categories
- Composite Covers — For corrosive or UV-heavy environments
- Manhole Hooks — Lifting tools for safe cover removal
- All Manholes
Frequently asked questions
How much does a cast iron manhole cover cost?
Our cast iron manhole covers and frames run from about $74 to $340 depending on diameter, frame depth, and lid configuration. Smaller monitoring-style covers sit at the low end of that range; larger bolt-down frame-and-cover assemblies at the high end. Full municipal roadway castings can cost more elsewhere, but for utility access, monitoring wells, and facility openings this range covers most replacement needs. Every cover in the collection shows its price on the product page.
Are manhole covers standard size?
No — there is no single universal manhole cover size. Diameters, frame depths, and seat designs vary by manufacturer and application. Our EMCO cast iron line centers on 8”, 12”, and 18” round covers with a range of frame depths. When replacing an existing cover, measure the clear opening diameter and the frame depth rather than assuming a standard; an exact match is what keeps the new lid seated flush and rattle-free.
Can you just replace a manhole cover without replacing the frame?
Often, yes. If the existing frame is sound and properly seated, you can replace only the lid — match the opening diameter and seat style so the new lid sits flush. If the frame is cracked, corroded, or has settled out of level, replace the frame-and-cover assembly together. A new lid dropped into a damaged frame will rock under load and wear out prematurely.
Who is responsible for manhole covers on my property?
Generally, whoever owns the structure underneath. Covers over public sewer or utility lines are the municipality's or utility company's responsibility even when they sit on private land, while covers over private laterals, monitoring wells, or on-site utilities belong to the property owner. If a cover on your property is damaged, call the utility first to confirm ownership — if it turns out to be yours, replacements are straightforward to order by size.
What's the difference between poly skirt and steel skirt frames?
Poly skirt frames use a lightweight polyethylene skirt — suitable for non-traffic areas like monitoring well access, landscaped utility points, and residential installations where the cover won't bear vehicle loads. Steel skirt frames are heavy-gauge steel that anchors into concrete or asphalt and distributes vehicle loads across the frame. If wheels will ever cross the cover, spec the steel skirt.
Can I get a bolt-down cast iron cover?
Yes. We carry bolt-down lid configurations for applications requiring tamper resistance and secured access — regulated monitoring sites, secured facilities, and any location where unauthorized entry is a concern. The lid fastens to the frame with bolts rather than simply laying in, so it also stays put under vibration and won't be dislodged by traffic or flooding.
How heavy are cast iron manhole covers?
Weight varies by size and lid thickness. A 12” round cover typically weighs 30–50 lbs, and larger covers and frame assemblies are heavier still. That mass is what keeps the lid seated under traffic, but it also means safe handling matters — we recommend a manhole hook for lifting rather than fingers under the rim.