The required anchorage and lap length may be further reduced when one or more of the following conditions are present. Anchorages and splices is the definitive source for information on development and splicing of reinforcing bars. Crsis reinforcement anchorage and splices includes tables of. The bar number for metric bar sizes denotes the approximate diameter of the bar. Nearly all reinforcing bars currently produced in the usa are marked with the metric numbers, 16, etc. After the formwork is removed, straight or bent splice bars are installed into the coupler to extend the reinforcing bar. The definitive source for information on development and splicing of reinforcing bars.
Now in its sixth edition, the book features data on mechanical splices including load tests for. Jayne sperry, samir alyasso, nathaniel searle, michael derubeis, david. Although mostly used for splicing reinforcing bars to dowel splice bars, nothing precludes their use as standard tensioncompression mechanical splices. This site is like a library, use search box in the widget to get ebook that you want. Reinforcing bars anchorages and splices download ebook. Anchorage and lap splicing detailing of slabs, columns. Tension development length and lap splice design for. Terminator effectively reduces the length of reinforcing bar required, thus minimizing congestion. Reinforcement, anchorages and splices, 5th edition 2008 now available. Click download or read online button to get reinforcing bars anchorages and splices book now. The bond design provisions of the aashto american association of state. Introduction reinforcement for concrete to develop the strength of a section in tension depends on the. Tension development and lap splice lengths of reinforcing. Now in its sixth edition, the book features data on mechanical splices including.
Headed bars are often used to anchor reinforcing steel as a means of reducing congestion where member geometry precludes adequate anchorage with a straight bar. Crsi reinforcement, anchorages and splices, 5th edition. Rta structural drafting steel reinforcement detailing and detailing manual otb005 issue 1 revision 2 05 march 2010 page 3 of 3 the lap splice length of bars in tension shall be not less than the development length, lsy. Download pdf reinforcing bar splices free online new. However, when lap splices are undesirable or impractical, or when their use is not permitted by the design code or design specification, mechanical or welded connections should be used to splice the reinforcing bars. Features technical data on mechanical splices including load tests for type 1 and type 2 splices. Frequently asked questions about mechanical splices. Anchorages and splices 6th edition 2017 crsi on amazon. The key factors that govern development anchorage and splice performance of reinforcing bars in tension are described. Pdf anchorage of headed reinforcing bars in concrete. Other mechanical splices can couple bars without any special end preparation. Features technical data on mechanical splices including load tests for t.
The fileopen plugin works with adobe reader and other viewers. These couplers are typically made from steel conforming to astm a108. A simple pipe wrench can be used to snug and secure the splice assembly. The length of the lap varies depend on concrete strength, the rebar grade, size, and spacing. Currently, limited data on the behavior of headed bars are available, with no data on highstrength steel or highstrength concrete. In order to read a secure pdf, you will need to install the fileopen plugin on your computer. Field assembly of splices and erection of reinforcing bars. These items are anchorage embedment length of reinforcement and location and length of lap splices. Includes extensive tables of development and lap splice lengths. Anchorages and splices 2008, where extensive design tables. Klingner research report 18553 research project 01855 explore new uses for theaded bars in structural concrete reinforcement applications conducted for the. Includes extensive tables of development and lap splice lengths for grade 60 reinforcing bars with 3,000 to 10,000 psi concrete compressive strengths, and development and lap splice tables for epoxycoated reinforcing bars, including development length tables.
The nominal dimensions of a deformed bar are equivalent to those of plain, round bar having the same weight mass per foot meter as the deformed bar. Includes extensive tables of development and lap splice. Splicing bar concrete reinforcing steel institute crsi. This study is part of a comprehensive study of the anchorage behavior of the headed bars. Technical report documentation page fhwatx018551 4. Crsi 10splbk reinforcement, anchorages and splices, 5th. Ttgt coldswaged mechanical splices, end anchorages and connectors are made from high quality domestic steel and mee t the chemistry, grade and class a tensile properties of astm a519, a576 or a970 as applicable. Anchorage of conventional and highstrength headed reinforcing bars by yun shao david darwin matt oreilly remy d. Lequesne krishna ghimire muna hano a report on research sponsored by electric power research institute concrete reinforcing steel institute education and research foundation barsplice products, incorporated. Handbook manual guide by concrete reinforcing steel institute, 01012017. Due to length limitations of the reinforcing bars, and in order to maintain desired continuity of the reinforcement, reinforcement bar that. This report provides a summary of the current state of knowledge of the factors affecting the tensile bond strength of straight reinforcing bars, as well as realistic descriptions of development and splice strength as a function of these factors. In the field, reinforcing bars are cast in concrete with the flanged coupler attached to the form face.
The objective of this report is to provide engineers and contractors. Includes extensive tables of development and lap splice lengths for grade 60 reinforcing bars with 3,000 to 10,000 psi. Features technical data on mechanical splices including load tests for type 1 and type 2 splices, grades 40 to 80. Designdetailing supplements, key publications this popular publication is the definitive source for information on development and splicing of reinforcing bars. Includes extensive tables of development and lap splice lengths for grade 60 uncoated and epoxycoated reinforcing bars with 3,000 to 10,000 psi concrete compressive strengths. The guide can be used in conjunction with the placing reinforcing bars publications or as a standalone product. Using the development and lap splice length tables. Pdf mechanical properties for splices of welded reinforcing. For deformed welded wire fabric, shear reinforcement and mechanical anchorage devices, and.
Anchorages and splices 10 splices 2017 december 28, 2019 december 21, 2019 admin. Expanded coverage of reinforcing bars to include rail and axlesteel astm a996, stainlesssteel astm a955 and lowcarbon chromium astm a1035. Resources search concrete reinforcing steel institute crsi. Reading assignment chapter 5 of text aci 318 chapter 12. A detailer should be familiar with the numerous mechanical splice and headed bar systems on the market and make notes if special end preparations are required. Added nylon sling capacity tables according to current osha guidelines. Behaviour of beam lap splices under seismic loading. Reinforcing bars are manufactured in both international system sicommonly known as metricmeasured in millimeters, and u. Headed reinforcing bars serve as a viable alternative to hooked bars for anchorage in concrete because they provide a more efficient anchorage mechanism and limit congestion of the reinforcement.
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