ACI 224.3R ERTA-2008 Joints in Concrete Construction.pdf

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1、 ERRATA ACI 224.3R-95 Joints in Concrete Construction 1stprinting Reported by ACI Committee 224 Page 34, Section 8.5, second to last paragraph should be removed. Revised as: Wall construction joints should be spaced at 15- to 25-ft (4.5- to 7.5-m) intervals, with the first joint occurring 15 ft (4.5

2、 m) from the corner of the structure (PCA 1984). Construction joints should also be located where abrupt changes in thickness occur in walls. Walls with frequent openings should have construction joint spacing limited to 20 ft (6 m). Page 35, Section 8.5, last paragraph, revised as: Keyways are ofte

3、n provided in wall-to-footing construction joints, especially if no reinforcement holds the wall and footing together (PCA 1984). The keyway can be formed by pressing a slightly beveled 2-x-4 (50-x-200 mm, nominal) into the fresh footing concrete. The keyway 2-x-4 should be oiled well before it is used so it can be removed after the concrete has hardened. Updated on 1/31/08 2:15 p.m.