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Galvanized Deck Ring for 18" T-Handle Flush Manhole (Model #TH430-DR-GL)
The Model #TH430-DR-GL is a heavy-duty, structural galvanized deck ring engineered as the primary matching mounting frame for 18" quick-acting T-handle flush manholes. Fabricated from high-grade carbon steel and subjected to a rigorous hot-dip galvanization process, this component provides a robust, tapered structural coaming seat that seals flush-deck handle assemblies. Featuring a specialized step-profile thickness designed to withstand extreme shear loads and vertical compression, it ensures an unyielding, watertight interface that prevents environmental degradation and deck-plate deformation in severe marine environments.
Key Features
- Hot-Dip Galvanized Corrosion Protection: Delivers an ultra-thick zinc layer that guards against abrasive wear, saltwater oxidation, and deep-pitting corrosion over extended service lifecycles.
- Tapered Structural Profile Thickness: Transitions from a 1-1/8" top edge down to a heavy-duty 1-3/8" bottom edge to optimally distribute heavy deck cargo loads into the hull framing.
- Structural Weld-In Geometry: Engineered with a substantial 20" outer diameter for seamless, full-penetration welding directly into existing steel deck plates.
- Flush-Fitting Operational Profile: Provides a clean 18" inside diameter opening that installs flush with the surrounding deck plate to prevent catch-points for heavy cargo, nets, lines, or vessel vehicular traffic.
Specifications
| Part No | Size | Approx. Weight | Overall Length | Top Length | Throat Width | Throat Height | Base Width | Overall Height | Top Thickness |
|---|---|---|---|---|---|---|---|---|---|
| TH430-DR-GL | 18" (457 mm) | — | 20" (508 mm) | 1-1/2" (38.1 mm) | 1-1/8" (28.6 mm) | 1-3/8" (34.9 mm) | — | — | — |