Jul 02, 2015 rat trap construction with iron rods on lateral pressure wall. Rat trap bond technology practical action sri lanka. Usage of this technology leads to 20% reduction in the numbers of bricks required for the construction and this automatically brings down the price. May 11, 2015 the material presented shows that the rat trap bond wall can be successfully adopted for normal buildings and will result in 25% saving in bricks and more than 30% saving in mortar. Saving 10 mice in 10 minute rat trap 1 gaten stupid mouse trap easy make a mouse trap duration. Rat trap bond cross joint with reinforced duration. The interiors remain cooler in summer and warmer in winters. Rat trap bonds this doublewall technique uses bricks on edge with a cross brick between each and produces a 9inch thick wall with an insulating air cavity in between.
A rat trap bond is a type of wall brick masonry bond in which bricks are laid on edge i. You can reduce construction cost of your house by approximately 26% by using a simple construction technology called rat trap bond. 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. Vernacular arch and its adaptation in modern construction. Pdf comparison of performance of rat trap brick bond with the. One such building technique is the use of rat trap. Commonbond construction, 2077 woodstone dr, victoria, mn owned by. Rat trap bond wall is a cavity wall construction with added advantage of thermal comfort. As the construction is appealing to the eye both internally.
How to bond with your pet rat with pictures wikihow. Rat trap bond for walls architecture et developpement. Rat trap bond wall, brick arches and filler slab this housing construction is the result of a technology that has been developed by the architect laurie baker see note 2 and has been tested and proven during the past 40 years in india. Openings are normally provided in the walls as door, windows and ventilators. This can be avoided by holding a piece of wood about 3feet x 3inches x 34inch over the middle of the wall to cover the cavities while applying the mor tar. Contrary to other technologies, this amazing building technology is not new. What are the difference between tender and contract documents. The roof of the central portion of the building, shaped like a dome, is made with brick without using steel or concrete. Generally, they are placed in vertical position and with that they leave a hollow space in the wall.
Feb 05, 2016 rat trap bond house this building, designed on the pattern of anganwadi centre, has arch foundation, rat trap bond wall and filler slab roof. Exam structure 85 multiplechoice questions 3 graphic vignettes accessibility ramp stair design roof plan. The air medium that is created by the bond helps maintaining a good thermal comfort inside the building. Buesgens, keith m holds a license and 7 other licenses according to the new jersey license board their buildzoom score of 90 indicates that they are licensed or registered but we do not have additional information about them. But then you can also have solid rat trap bond walls. The construction of corbels above doors and windows. Types of bonds in brick masonry wall construction duration. Never squeeze your rat and avoid restraining it for more than a few seconds at a time. Rattrap bond when kept exposed, create aesthetically pleasing wall surface and cost of plastering and painting also may be avoided. In this document i have tried to give a step by step process how to do lay out rattrap masonary. Apr 16, 20 building design and construction, including environmental, social, and economic issues, project and practice management. Established in 1994 and registered in 2000, society for environment protection sep is a multidisciplinary youth organization working in the fields. In fact, the chinese bond is a method used when you are constructing with bricks. One of the core principle of the society for environment protection sep is to promote a sustainable and accountable society through scientific and technological interventions and by creative involvement of youth in social reconstruction.
Prepping for project bonds law360, new york august 28, 20, 11. 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. The dead load on the foundation would also be reduced by at least 20%. Rat trap bond when kept exposed, create aesthetically pleasing wall surface and cost of plastering and painting also may be avoided. 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. Rat trap bond brick work definitely looks much more aesthetic than normal flatbrick solid brick work. Top 10 energyefficient construction techniques the. Dec 24, 2015 rat trap masonry have about 20% less dead weight and hence reduced sized of structural members and cost savings. It can be avoided by the use of snapped headers to create other forms of brickwork. Rat trap bond information civil engineering facebook. From the lintel upward, the standard rattrap bond can be repeated. Depending on the parties to the bonding transaction, these bonds protect against damages that might be sustained at various stages of the construction process.
This rat trap bond manual is part of the practical construction knowhow transfer package developed by the vsbk cesef project nepal. Jan 28, 2014 hi, i have a 2 story house with a attic which is the 3rd story, as well as a cellar under one section of the house. 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. Keep your hands open and let the rat move around at will. Pdf comparison of performance of rat trap brick bond. The rattrap brick wall can be constructed in 8 or 9 thicknesses its strength is compatible with to standard 9 brick wall, but consumes 20% less. Perhaps much of the content of the manual may be of relevance to many other parts of india. In this document i have tried to give a step by step process how to do lay out rat trap masonary. The re museum might be able to guide you to some original material. Use of costeffective construction technologies in india to. By spending time in your hands, your rat will get used to your scent and bond with you.
Then, the bricks have a special way of placing and arranging. With this technique there is reduction in cost of the wall by 25% as with conventional english bond 9thk wall 350 bricks are required per cu. The study is one of two research components aimed at. Basic construction training manual for trainers join for water. The cavity in rat trap masonry provided added thermal comfort.
I would be amazed if the re journal of the 1930s didnt have an article on it. 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. If mortar is placed carefully on the bricks some of it will fall into the cavities and be wasted. Rat trap bond also chinese bond substantially observes the same pattern as flemish bond, but consists of rowlocks and shiners instead of headers and stretchers.
Rat trap bond method in construction free autocad blocks. In order to achieve this there are several building construction. Experimental investigation of rattrap bond masonry systems under base shock excitation. You dont save 30% of bricks, but rather approximately 1520%, as you will have solid brickwork at the edges, corners, joints, floor level, sill level, lintel level, roof level, corbels. While laying bricks, the manner in which they overlap is called the bond. Sep 11, 2016 it was a way of making the bricks go a lot further height.
In hilly area solidhollow concrete block walls with rcc bands, as per 1. Remember above the lintel there are in most cases no openings but masonary has to continue. Rat trap bond brick wall construction by earthbound. Chemical product and company identification product name. How to reduce construction cost of my house and build it by.
The house is made of the rat trap bond brick work from the 1800s, and i am wonderingconcerned if it is safe structurally. Pick up your rat by placing your hand under its belly. What bonds are and are not a construction bond is a written agreement in which one party the surety guarantees that a. Rat trap bond is a modular type of masonry bond in which the bricks are. For the love of physics walter lewin may 16, 2011 duration.
Acceptable housing laurie baker 1999 this manual is mainly put together to help deal with working out inexpensive, effective and acceptable housing schemes for the homeless families in kerala. Each type is then covered separately with an explanation of its function and advice on its use. One such building technique to save energy is the use of rat trap bond rbt masonry. In addition this type of wall does not need thick plastering as both front and rear face of. Pdf energy efficiency and sustainability are the basic needs of modern era. There are several types of bonds developed in different countries from time to time. My architect had always said that rat trap bond is what hed use on our load bearing walls, but now has suddenly changed to say that you cant use it on load. They are called as stretcher bond, english bond, flemish bond and rattrap bond. Inadequate manual compaction can lead to poor quality concrete. Rat trap bond construction, advantages, and disadvantages. 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. The bid bond in any construction project that is put out for bid, there is a gap to be bridged between the. Pdf experimental investigation of rattrap bond masonry. If a rat sees another rat getting killed in a snaptrap or eating acutely toxic bait and getting seriously ill immediately he will learn.
Standard production shapes ssti ogee header 678 2 pieces 1 corner note. Rattrap bond saves consumption of bricks by 18% and cement by 24% as compared to conventional english bond in addition to being lighter by 25% in weight. I hear different stories from different websites and people regarding the rat trap bond brick work. The topmost layer of brick on walls must be placed flat. This gives a wall with an internal cavity bridged by the rowlocks, hence the reference to rat traps. Feb 26, 2016 rattrap bond construction training classes in lalitpur ktm. Baker made many simple suggestions for cost reduction including the use of rat trap bond for brick walls, having bends in walls that increased the strength and provided readymade shelves, thin concrete roofs and even simple precautions like shifting dug up soil into the built area rather that out of it. Rat trap bond walls and brick arches at openings economise the cost of construction. When rattrap bond wall construction is considered, the. Its unique feature was the thin edge laying, not just the openings. What is rat trap bond 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.