The rat trap bond construction technology is a cavity walling system. We suggest putting bond breaker tape down at the seams. Jul 10, 20 rat trap bond it is made by placing the bricks on their sides having a cavity of 4. Pdf comparison of performance of rat trap brick bond with. It is composed of header bricks, set in rows that are offset. Of bricks and bonds the rat trap bond architecturelive. Sep 11, 2016 quetta bond is a technique developed after the quetta earthquake, used in brick and other masonry buildings, where vertical reinforcement is used to improve horizontal and vertical bond between walls see image. Home tutorials low cost rat trap bond for brick masonry. Pdf experimental investigation of rattrap bond masonry. This small book is about the best ways of using this common burnt brick, the simplest and least complicated of all our inventions. Rat trap bond pdf a rattrap bond is a type of wall brick masonry bond in which bricks are laid on edge i.
A comparison on simulation and validation of rural. Brick masonry s brick brick in the wall brick facade brick and stone brick wall architecture concept diagram brick architecture. By adopting rattrap bond method one can create aesthetically pleasing wall surface and plastering the traditional. To produce brick work in english bond you dont need some special supervision and thus the progress is more but for flemish bond you need to assess every course which reduces the pace of the work. A solid masonry wall is a poor insulator solid masonry wall is massive and as such absorbs and stores heat during day and gives up during night. If you are seeing only header bricks facing you than such a brick bond is known as a header bond. This bond is weak in strength but it is economical brick masonry is made up of brick units bonded together with mortar. Stretcher bond now used for most cavity brick walls but has a monotonous appearance. Building with many windows providing desired ventilation and light lintels are constructed just above the openings. Rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and. The first rule of starting any masonary whether exposed or not is to place all the units bricks, blocks, or stones in the bond decided all over the plinth even covering the door openings. Some more complex patterns are selected for aesthetic reasons, while simple patterns are used for brick surfaces that will be covered with plaster or stucco.
Technical notes on brick construction international masonry institute ww. Connecting the architecture and design community with leading brands to create efficient, modern and sustainable designs. The various types of bonds generally used in brick masonry are stretcher bond header bond english bond and flemish bond. Test methods for evaluating masonry bond strength c. Brickwork is masonry produced by a bricklayer, using bricks and mortar. Originally used for single brick walls, now called 12 brick walls. Rat trap building first time ever rat trap bond brick work in madurai.
If you break one brick, then more than one brick will fall down. Apply insulbloc spray polyurethane insulation in accordance with the appropriate ncfi polyurethanes technical data sheet. Can make a wall of one brick thickness with fewer bricks than a solid bond. The shiner and rowlock are visible on the face of masonry. Show full abstract given area, rat trap bond is also gaining popularity. By adopting this method of bonding of brick masonry compared to traditional english or o flemish bond masonry, it is possible to reduce in the material cost of bricks by 25% and about 10to 15% in the lintel. Rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall. Flemish bond shows more attractive and pleasing appearance of masonry work. Alternate bricks laid headerstretcher with the back end of the header lining up with the centre of the. Show full abstract given area, rattrap bond is also gaining popularity. Masonry cavity wall insulation system masonry cavity wall. Sep 17, 2015 types of bonds in brick masonry brick masonry is built with bricks bonded together with mortar.
Rattrap bond saves consumption of bricks by 18% and. Rat trap bond rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position or laid on edge instead of conventional horizontal position and thus creating a cavity hollow space within the wall. Building walls with rat trap bondtheyre really cool bt. This playlist contains complete types of bonds in brick masonry the types of bonds available currently in this playlist are flemish bond, english bond, header bond, stretcher bond, stack bond. That in the flemish bond, the smaller bricks seem to be about half the size of the bigger ones, while in the rattrap bond, they seem to be only about a third the size. Specification for facing brick solid masonry units made from clay or shale c 279. Note the rowlock arch, which is the style throughout rest of house.
Flemish bond is economical as it uses broken brick bats. Fortunately most of us cannot afford these soulless wire cut bricks. Brick masonry, stone masonry, curing, plastering and flooring. Types of windows architecture window types types of windows architecture pdf. The load bearing tests done at the anna university has proven that a wall in rattrap bond performs as good as the usual english bond. Our products can be used on exterior and interior walls. The masonry work with new technology rat trap bond in flyash brick saves 33% cost as compared to common bricks.
Header bond header bond also known as spanish bond was a very common bond for bearing walls. Tade gugsa on download handbook of material testing book by shiv kumar pdf. All these will create many challenges to the professionals involved in the building industry that have to be solved by. Experimental investigation of rat trap bond masonry systems under base shock excitation. Of bricks and bonds the rat trap bond post by earthbound architecture rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall. Master masonry restoration, your north dallas residential brick and crack repair contractor 1612 fairwind ct, carrollton, texas 75007 foundation repair advice and restoration consultation in the dallas region.
For example, in the uk a brick is defined as a unit having dimensions less than 337. English bond is much stronger than flemish bond for the walls thicker more than 1. Low cost rat trap bond for brick masonry iamcivilengineer. Brick coursing types stretcher header rowlock soldier sailor shiner.
Rat trap bond is a kind of wall brick masonry bond in which bricks are sited on edge such that the shine r. The word masonry actually encompasses techniques which may differ substantially depending on type and shape of materials and construction methods. Brick and cmu construction this publication 2012 masonry institute of washington. Oct 29, 2016 home tutorials low cost rat trap bond for brick masonry. The load bearing tests done at the anna university has proven that a wall in rat trap bond performs as good as the usual english bond. Quetta bond is a technique developed after the quetta earthquake, used in brick and other masonry buildings, where vertical reinforcement is used to improve horizontal and vertical bond between walls see image. Bond patterns such as flemish bond, english bond, dutch bond english cross, common bond 6th course header and common bond 6th course flemish header with header units and courses were traditionally used in doublewythe brick construction to bond separate wythes together for structural strength. The properties of compressed earthbased ceb masonry. It can be avoided by the use of snapped headers to create other forms of brickwork. Types of mortar cement mortar lime mortar cementlime mortar lime surkhi mortar mud mortar. Jul 11, 2016 rat trap bond is a brick masonry method of wall construction, in which bricks are placed in vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall. Rat trap bond it is made by placing the bricks on their sides having a cavity of 4. Building walls with the rat trap bond posted on 6 november, 2012 by vistasp just in case ive got you visualising rodents scurrying about where theyre not wanted, ease your mind.
A rat trap bond is a brick masonry bond in which the bricks are placed such that there are air cavities in the structure saileysh et al. There are many different types of brick bonds and each has its own look, installation challenges, and in the case of walls, structural considerations. Basics of rat trap bond module, ends, l and t junctions importance of laying uniform thickness of mortar correct calculation of length of walls as per rat trap modules different types of pointing use of tools in rat trap bond understand the basics of rat trap bond masonry practice limitations of rat trap bond. Pdf comparative performance of masonry bond patterns. Random rubble arch foundation is used for these houses. Masonry bibliography, 18301990 masonry institute of america. Rat trap bond this rare bond was used in the early to mid 19th century as a cheap form of brickwork by laying the bricks on edge. It incorporates the bricklaying technique rat trap bond see image. A rat trap bond is a type of wall brick masonry bond in which bricks are laid on edge i. Reinforced masonry engineering handbook national concrete masonry association. Patterns for paving surfaces include basket bond and herringbone bond. It saves approximately 25% brick and 40% cement, and reduces the construction cost by 25%.
Rattrap bond is a kind of wall brick masonry bond in which bricks are sited on edge such that the shine r. After installation of all panels caulking should be tooled to seal all edges. For temporary sheds mud mortar may be used but for all permanent buildings lime or cement mortars are used. It is used for cavity walls as less cutting is required. A rattrap bond is a type of wall brick masonry bond in which bricks are laid on edge i. Difference between english bond and flemish bond are as follows. Nov 06, 2012 building walls with the rat trap bond posted on 6 november, 2012 by vistasp just in case ive got you visualising rodents scurrying about where theyre not wanted, ease your mind. Brick masonry is used for construction of buildings and other structures by using brick stone, stone blocks, brick blocks with different types of masonry. Rat trap bond brick wall construction by earthbound. Akhtar et al 2011 concluded based on their experimental work.
Other variations of this alternating pattern include the english bond, rattrap bond, monk bond, and header bond. Rattrapbond, autoclaved aerated concrete blocks, normal bonds. Rat trap bond brick wall construction by earthbound architecture. It applies to both brick walls and brick paving for patios and paths, as well as to concrete block and other types of masonry construction. Masonry organizations organization web address comments brick industry association. While in a conventional english bond or flemish bond, bricks are laid flat but in a rat trap bond they are placed on edge forming the inner and. Laurie baker is invented the rat trap bond for an cost effective construction. Rat trap bond construction, advantages, and disadvantages. Practical action walls using the rat trap bond technology technical brief 3 corbel bench seat when constructing a corbel seat an 8 wide rattrap supporting wall must be constructed on a brick foundation of 12 width and 3 thickness to the required length of the seat. Typically, rows of brickscalled courses are laid on top of one another to build up a structure such as a brick wall. In addition, the air cavities act as a thermal insulation and reduce heat penetration from the external sources. Rat trap bond is a modular type of masonry bond in which the bricks are placed in a vertical position. Pdf comparison of performance of rat trap brick bond. Rat trap bond is a modular type of masonry bond in which the bricks are placed in a vertical position which creates a cavity in the wall while maintaining the same wall thickness as that of the conventional brick masonry wall.
A brick bond is a pattern in which bricks are laid. Thermal comfort in traditional buildings composed of local. Cost wise comparison on gap fillers in masonry walls. Closer it is the portion of the brick cut along the length in such a way as one long face remains intact. A masonry unit laid flat with its longest dimension. The other disadvantage is in using concealed wiring and plumbing.
The rat trap bond is a masonry technique, where the bricks are used in a way which creates a cavity within the wall, while maintaining the same wall thickness as for a conventional brick masonry wall. Experimental investigation of rattrap bond masonry systems under base shock excitation. Properties of compressed earthbased masonry blocks. The masonry work with new technology rattrap bond in flyash brick saves 33% cost as compared to common bricks.
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