The rat trap bond construction is a modular type of masonry construction. 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 2. Rat trap bond advantages and disadvantages engineering. For temporary sheds mud mortar may be used but for all permanent buildings lime or cement mortars are used. It incorporates the bricklaying technique rat trap bond. A series of projecting bricks or other masonry units, each unit stepping progressively farther forward with height. Pdf comparative performance of masonry bond patterns.
Sample quotation for building construction based on item. Pattern bond refers to the pattern formed by the masonry units and mortar joints on the face of a wall. Masonry means construction of buildings using building blocks like stone, bricks, concrete blocks etc. Rat trap bond construction, advantages, and disadvantages. An exterior building material used primarily on art deco facades.
Header bond header bond also known as spanish bond was a very common bond for bearing walls. From these bonds, an infinite number of bonds and patterns can be developed. Brick on edge bond raking bond dutch bond zigzag bond garden wall bond rat trap bond types of bond. Types of bricks modular bricks conventional bricks 4. This paper presents the experimental investigations of small burnt clay brick masonry samples.
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. If the bricks available, are having a compressive strength of more than 4 nmm2, then rattrap bond masonry can be adopted. If you break one brick, then more than one brick will fall down. 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. It can be avoided by the use of snapped headers to create other forms of brickwork. Rat trap bond is a kind of wall brick masonry bond in which bricks are sited on edge such that the shine r and rowlock are visible on t he face of masonry. Unreinforced brick masonry construction 3 the structural performance of brick masonry buildings depends on the following four types of connections within masonry elements. We have a basement done with stone masonry 14 walls, and then will have another 3 in ashlar masonry, and then about 7 in kerala brick at 9 thick. Both are centrally located to serve the entire country. Use of costeffective construction technologies in india. Types of bonds in brick masonry wall construction are classified based on laying and bonding style of bricks in walls.
In fact, the chinese bond is a method used when you are constructing with bricks. Rattrap masonry reduces cost by minimizing the consumption of bricks and cement mortar. Teach yourself to nake a two brick wall using an english bond this course will help anyone interested in getting started with masonry. The running bond is the most used bond and is composed of stretchers offset by 12 brick per course. An experimental programme examining the bond strength of mortarunit joints was therefore carried out, using mortars with and without pozzolans. If the wall is arranged such that the bricks at the rear do not have this pattern, then the brickwork is said to be single flemish bond.
Typically you will find the stretcher, header and soldier are the most common directions. Types of mortar cement mortar lime mortar cementlime mortar lime surkhi mortar mud mortar. This video explains what silverlock bond in brick masonry brickwall is. Brick dimensions are expressed in construction or technical documents in two ways. 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 bonds in brick masonry is developed by the mortar filling between layers of bricks and in grooves when bricks are laid adjacent to each other and in layers in walls. Its unique shape breaks up mortar droppings and prohibits mortar from creating a moisture retaining barrier, allowing water to flow freely to the weep holes. Rat trap bond is a brick masonry method of wall construction, in which bricks are placed in a vertical position instead of conventional horizontal position and thus creating a cavity hollow space within the wall. This bond is weak in strength but it is economical brick masonry is made up of brick units bonded together with mortar. The crvalue is analogous to the thermal diffusivity of a material. Mortar bond refers to the adhesion of the joint mortar to the masonry units or to the reinforcing steel. Also the course below sill and lintel to be a solid course by placing bricks. Stretcher bond now used for most cavity brick walls but has a monotonous appearance. Comparative performance of masonry bond patterns by c.
Mortar is the binding material for the building blocks. Browse anchor walls technical materials, including freestanding and retaining wall construction details, freestanding and retaining wall product specifications, cad drawings, installation guides and more. Rat trap bond brick wall construction by earthbound. Building with many windows providing desired ventilation and light lintels are constructed just above the openings. Additions for next version the following are under preparation for the next version of the training package 1. Select materials to add them to your zip folder, then download or email the files for easy access. 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 various types of bonds generally used in brick masonry are stretcher bond header bond english bond and flemish bond. Also the course below sill and lintel to be a solid course by placing bricks on edge. Laying of bricks bonded together with mortar is known as brick masonry. There are many different types of brick bonds and each has its own look, installation challenges, and in the case of walls, structural considerations.
In addition, there are two pocket handouts in hindi about rat trap bond and conventional english bond masonry. The rat trap brick wall can be constructed in 8 or 9 thicknesses its strength is compatible with to standard 9 brick wall, but consumes 20% less. Rat trap bond is a modular type of masonry bond in which the bricks. The openings and wall dimensions to be in multiples of the module. A brick bond is a pattern in which bricks are laid. Due care must be taken while designing the wall lengths and heights for a structure. Rat trap bond was commonly used in england for building houses of fewer than three stories up to the turn of the 20th century and is still used in india as an economical bond. Stretcher bond header bond english bond flemish bond facing bond. Brick masonary ppt presentation by abhishek bagul 1. Capacitive insulation benefits are greatest in climates with a high daily temperature. Types of bonds in brick masonry wall construction and. The effect of mortar composition and strength on the masonry s flexural bond strength using three types of masonry.
Brickwork is masonry produced by a bricklayer, using bricks and mortar. Flexural bond strength of masonry using various blocks and. With older masonry walls you will find units like the header and rowlock which would join the multiple wythes of brick. American bond, common or running bond, english bond, and flemish bond. A rat trap bond is a type of wall brick masonry bond in which bricks are laid on edge i. Experimental investigation of rat trap bond masonry systems under base shock excitation. Disadvantages it has to be done by masons trained in rat trap bond, because there could be wastage of mortar falling into the gap.
Mortar trap is manufactured from highdensity polyethylene hdpe strands woven into a 90% open mesh. The shear bond strength has been obtained from 3 brick triplets. Rat trap bond pdf a rattrap bond is a type of wall brick masonry bond in which bricks are laid on edge i. Division 4 sample question during a weekly jobsite visit, the architect notices that the mason has used troweled joints on an exposed exterior masonry wall, instead of the weatherstruck joints that were specified. The air medium that is created by the bond helps maintaining a good thermal comfort inside the building. Sample quotation for building construction based on item rates contract all rate are not in current update its just format of quotation sl. 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. A brick has 6 sides and can be installed in any direction. One such building technique is the use of rat trap. Typical brick bonds typical brick bonds the brick bonds illustrated below represent the most common masonry coursing. Height of brick masonry in one day should not exceed 1. It is composed of header bricks, set in rows that are offset.
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. Heat flow resistance of envelope masonry walls can be gauged by the crvalue, e. The other disadvantage is in using concealed wiring and plumbing. Bond in brick masonry it is the arrangement of bricks in each layer to avoid the continuity of vertical joints in any two adjacent courses.
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. Brick is a basic building unit which is in the form of rectangular block in which length to. This paper deals with an experimental study on flexural bond strength of masonry using various blocks in combination with different mortars. How to build a two brick wall using an english bond how. Brick coursing types stretcher header rowlock soldier sailor shiner. Flexural bond strength of masonry has been determined by testing stackbonded prisms using a modified bond wrench test setup. In this article different types of stone masonry used are explained and points to be observed while supervising stone masonry works are listed. It is simple to build and has better insulation properties. Rat trap bond method in construction is also known as chinese bond. Pdf comparison of performance of rat trap brick bond. Pdf experimental investigation of rattrap bond masonry.
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