![]() ![]() How can I tell if a bar was spliced with the 'B' or 'C' lap splice lengths per the table? Can anyone shed any light on this? I trued searching for chapter 12 of ACI 318-83 but can't find it. 0015hs in both directions, lap splice length shall be permitted to be multiplied by 0.83. ‘4, Fortied columns, where ties throughout the lap splice length have an effective area not less than 0. Can anyone shed any light on this? Also this statement is confusing to me. Lap splice lengths (minimum of 12 inches) are multiples of tension development lengths Class A 1 d and Class B 1 d (ACI 318 25.5). It shall be permitted to decrease the compression lap splice length in accordance with (a) or (b), but the lap splice length shall be at least 300 mm. There is then a table that gives lap splice lengths for Class 'B' and Class 'C' for both 'top' and 'other' bars.įirst off I'm not sure what are Class 'C' lap splices. THE LENGTH OF LAP SPLICES SHALL BE CLASS "B" WHERE NO MORE THAN 1/2 THE BARS ARE LAP SPLICED WITHIN THE LENGTH TABULATED BELOW AND CLASS "C" WHERE MORE THAN 1/2 THE BARS ARE LAP SPLICED WITHIN THE LENGTH TABULATED BELOW." "UNLESS CALLED OUT OTHERWISE ON THE PLANS. In the general notes section for the rebar lap splices I see this statement: Graybeal and Yuan 43 suggested with UHPC a minimum lap splice length of 6d b for the bar sizes from D13 to D25. The increase reflects the reduction in the exposed perimeter of the group relative to that of the same number of bars fixed separately (Fig. I can't find any information on the design code used but I would guess the ACI 318-83 that was revised in 1986. Compared to a lap splice of a pair of single bars, the lap length for an individual bar within a bundle is increased by 20 and 33 for two and three bar bundles, respectively. I'm reviewing an existing concrete and masonry structure that was designed in 1989. ![]()
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