Steel Buildings in Europe

Part 4: Detailed Design of Portal Frames 4 - 58 2 3 4 1 5 6 (a) For columns greater than or equal to 400 mm deep the holding down bolts may be located entirely within the section profile 4 2 1 5 6 3 (b) For columns less than 400 mm deep the bolts may be located outside the section profile 1 Top of concrete foundation 2 Holding down bolts in clearance holes (bolt diameter + 6 mm) 3 Base plate, usually 15 mm thick 4 Bedding space (  50 mm) 5 Location tube 6 Anchor plate Figure 11.3 Typical nominally pinned bases