A space between two bars is referred to as the overlapped or spliced column, as indicated by the terms overlapping length and lap length.
Lap splicing is a technique used to overlap two reinforcement bars. Loads are transferred securely from one member to another through the overlapping of reinforcement bars.
Reinforcement bars can be bought on the market in lengths up to 12 m. Reinforcement bars are joined together to obtain the required length for a structure larger than 12 m. Splicing or lapping uses this connection.
Depending on the method of laying the surface is staggered, welded, or provided via a couple. Column capping is equipped with lap splices, whose length will be determined by the concrete grade and steel reinforcement.
Lapping Column Zone
Three zones are formed based on the moment diagram for a column under lateral load. A maximum moment is applied to the center of a column by load, while no moment is applied to its ends.
Zones A and B of a column are categorized according to the maximum moment experienced by the upper and lower portions, respectively.
Zone-B of the column, therefore, becomes the lapping zone of it since it is less critical. For ductile detailing of RCC columns, ductile zones are designated to provide confining reinforcement.
Zone-A has a length like hc/4, if the clear distance is hc. Consequently, the height of Zone-B is calculated by (hc- (h/4 + hc/4)) = hc/2.
Published By
Arka Roy
www.constructioncost.co
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