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