LG Industries manufactures J Type Foundation Bolts are heavy-duty anchor bolts specifically designed to secure tower cranes to reinforced concrete foundations. Their distinctive J-shaped hooked end provides excellent mechanical anchorage within concrete, ensuring stability under high static and dynamic loads generated during crane operation.
Description & Construction
A J Type Foundation Bolt consists of a straight threaded rod with one end bent into a J-hook. The hooked portion is embedded deep into the concrete foundation, while the threaded end projects above the concrete surface to fasten the tower crane base using heavy hex nuts and washers.
For tower crane applications, these bolts are manufactured with high tensile strength and precise dimensional accuracy to withstand:
Heavy vertical loads
Overturning moments
Dynamic forces due to slewing, lifting, and wind loads
Material & Finish
Material: Mild Steel (IS 2062), High Tensile Steel (IS 1367 / ASTM grades as required)
Finish Options:
Black / Self Finish
Hot Dip Galvanized (HDG) – preferred for outdoor crane foundations
Zinc Plated (limited exposure conditions)
Key Features
Strong mechanical anchorage due to J-hook embedment
High resistance to pull-out and shear forces
Simple and reliable design for heavy equipment foundations
Suitable for temporary and permanent tower crane installations
Typical Specifications
Diameter: M24 to M72 (or as per crane manufacturer drawing)
Length: 600 mm to 3000 mm (customized)
Thread: Metric coarse, partial or full thread
Accessories: Heavy hex nuts, plain washers, spring washers / template plates
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