Load bearing interlocking block (LBIB) is one of the methods in Industrialized Building System (IBS) as classified by the Construction Industry Development Board Malaysia (CIDB), Using the LBIB in the construction of houses is fast and does not require formwork. The channel blocks act as permanent formwork constructed as beams where lintels are placed above window and door openings. The aim of this research is to determine the flexural strength of lintels constructed using the interlocking channel blocks. Two types of channel blocks were used and two types of arrangements for block types and reinforcements were constructed. Four point bending test were carried out for the two beams of length 1800mm span. The experimental results were compared to theoretical calculations from basic mechanics of materials for composite beams and a formula derived by (Pongburanakit and Aramraks,2006). Results shows that the arrangement of two layers of channel blocks gives stronger flexural strength compared to that of the face to face channel blocks.
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机译：承重互锁块（LBIB）是马来西亚建筑工业发展局（CIDB）归类的工业化建筑系统（IBS）中的一种方法。在房屋建筑中使用LBIB快速且不需要模板。通道块充当永久模板，被构造成横梁，门位于窗户和门的开口上方。这项研究的目的是确定使用互锁通道块构造的门的抗弯强度。使用了两种类型的通道砌块，并为砌块类型和钢筋构造了两种类型的布置。对跨度为1800mm的两根梁进行了四点弯曲测试。将该实验结果与复合材料梁的基本力学理论计算和由（Pongburanakit and Aramraks，2006）得出的公式进行了比较。结果表明，与面对面的通道块相比，两层通道块的排列可提供更强的抗弯强度。
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