12”/305mm Wax Cone (Conical Bolt Box)
Structural Steel Components
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12 /305mm Waxed Cone (Conical Bolt Box) Specification Details Product Code HD18 Material Waxed Cardboard Size 12 /305mm 12 (305mm) wax cone / conical bolt box. The most common size for standard agricultural portal frame foundations. Protects bolt threads and creates levelling access. What Is a Wax Cone? A wax cone (also called a conical bolt box or void former) is a waxed cardboard cone used when setting holding down bolts into concrete foundations. It creates a conical void around the bolt, giving you the lateral adjustment needed to line up your steelwork accurately when the columns are erec
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