Overview
Funnel / Sleeve Type Foundation Bolt
M20 – M56 | Up to 1200mm
Funnel or Sleeve Type Foundation Bolts feature a conical or tapered head that creates a mechanical lock in concrete. The funnel design allows minor positional adjustment before the concrete fully sets. Widely used in tunnel construction, metro rail projects, underground infrastructure, and deep foundation work where standard bolt types are insufficient.
Key Features & Benefits
- Conical funnel head creates mechanical lock in concrete
- Allows minor positional adjustment before concrete sets
- Superior pull-out resistance under high tensile loads
- Engineered for underground and tunnel construction
- HDG finish for subterranean and corrosive environments
- Custom funnel head dimensions available
- Full material test certificates provided
- Single and double funnel configurations available
01
Sleeve configuration allows for post-pour alignment adjustments of structural equipment.
02
Funnel shape expands clamping zone inside high-strength grouts.
03
Prevents bolt tension relaxation under vibration loads.
