0.13 22 1.5 SI: by dd mm df ll K f K f, (Eqn. Merely move the mouse pointer to the desired cell to view the contents of that particular "comment box". Development Length & Lap Splice Length For development and lap splice length requirements, the 2009 IBC references the 2008 MSJC (see Equation 3 and Table 3), but adds a maximum length limit of 72d b. ![]() (Note: presence of a “comment box” is denoted by a “red triangle” in the upper right-hand corner of a cell. 2.0, Provision 25.5.4.2 applies and the required minimum lap splice length has to be the greater of 1.5l d or 2 in. This program contains numerous “comment boxes” which contain a wide variety of information including explanations of input or output items, equations used, data tables, etc. LAP SPLICES & DOWELS National Building Code 2015, 4.3.3.1: Clause 4.3.3.1 references concrete design code, CSA A23.3 (specifically CSA A23.3, 12.14.2.3): 12.14.2.3 Bars spliced by lap splices in flexural members shall have a transverse spacing not exceeding the lesser of one-fifth of the required lap splice length or 150mm. Class A lap splices may be used where: (a) the area of reinforcement provided is at least twice that required by analysis over the entire length of the lap splice and (b) one-half or less of the total reinforcement is spliced within the required. The "Rebar Data" worksheet contains tables of reinforcing bar data which include various bar properties, reinforcing bar areas based on spacing, tension development and splice lengths for straight bars, tension development lengths for 90 degree standard hooks, tension lap splice criteria, compression development and splice lengths for straight bars, maximum spacing for column ties, and various plain welded wire fabric properties.Ĥ. Except as specified herein, lap splices of deformed bars in tension shall be Class B lap splices. ![]() A complete table of reinforcing bar development and splice lengths is also created for #3 through #18 bars.ģ. The "Calc Development" worksheet, for a given reinforcing bar size, determines the straight development and splice lengths for a "top" bar and an "other" bar in tension, the straight development and splice lengths for the bar in compression, and the tension development length of the bar as a standard hook, all at one time. This program follows the procedures and guidelines of the ACI 318-05 Building Code, Chapters 12 and 21.Ģ.
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