The test parameters were the reinforcing bar diameter, concrete cover thickness, concrete strength, and stirrup spacing. Twelve simply supported beams and slabs with reinforcing bar splices were tested under monotonic loading. Keywords: bond Class B splice high-strength steel splice lengthĪn experimental study was performed to evaluate the applicability of ACI 318 to the Class B splice of 600 MPa (87 ksi) reinforcing bars. It does not store any personal data.Title: Experimental Study for Class B Lap Splice of 600 MPa (87 ksi) Reinforcing BarsĪuthor(s): Won-Seok Choi, Hong-Gun Park, Lan Chung, and Jin-Keun Kim The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Non-contact lap-spliced bars should not be spaced too far apart. Contact splices–in which the bars touch and are wired together–are preferred because they are more secure against displacement during construction. CRSI’s “Reinforcement Anchorage and Splices” includes tables of required lap splice lengths based on these variables. When to use contact or lap splices in CRSI? The length of the lap varies depend on concrete strength, the rebar grade, size, and spacing. In the table, there are a few assumptions with respect to bar spacing, cover, etc.Ī lap is when two pieces of reinforcing bar (rebar) are overlapped to create a continuous line of rebar. 2) Table 12.2.2 is a slightly simplified method of applying Eq. Class A splices are 1.0 (a) the area of reinforcement times the development length.provided is at least twice thatĬlass B splices are used in beams per section 7.13. When to use a Class A reinforcement splice?Ĭlass A splices may be used when 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 lap splice length. The lap splice, as the name suggests, is created by overlapping two lengths of rebar, then wiring them together. What is splicing reinforcing bars?Ī lap splice is the most common method of creating a single structural entity from two rebar segments. The length of the lapped splice shall be not less than 40 bar diameters. What is the minimum length of lap in a lapped splice for reinforcing bars?ġ Lap Splices. Force is first transferred to the concrete through bond from one bar and then it is transferred to the other bar forming the splice through bond between it and concrete. ![]() The method used to join the reinforcement bars, so that the force is transferred effectively from one bar to the other is called as splicing. Other key points for lap splices: Tension lap splices are not permitted for #14 or #18 bars. and Class B ℓst would be 1.3 x 10 = 13 in. Minimum is determined to be 10 in., a Class A ℓst would be 1.0 x 10 = 10 in., increased to 12 in. ![]() What is the minimum length of Class A and Class B lap splices? Class B buildings are fire-resistant structures. The primary characteristic of Class B buildings is the reinforced concrete frame in which the columns and beams can be either formed or precast concrete. ![]()
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