Load transfer in a oneway slab, b twoway slab nilson fig. Oneway and twoway slabs university of asia pacific. Parapet wall page 45 for transferring horizontal point forces in conjunction with cantilever slabs or shear connections. The wall is assumed to be located in the christchurch port hills. Pdf cantilever slab design ramjan shehzaad academia. Design and detailing of reinforced concrete beams and slabs.
Cantilevered concrete slab design structural engineering. Reinforced concrete design 1 design of slab examples. For uniformly distributed loads of w per square foot of the slab, each strip acts approximately like a simple beam uniformly loaded by its share of w. Superior structural engineering software for analysis and design by risa tech, inc. Design and analysis of cantilever beam international journal of advanced technology and innovative research volume. The concrete deck slabs of girder bridges are usually projected transversely beyond the outermost girders. Cross sectional constant defines torsional properties c x. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Help release notes tutorials verification problems wood wall panel tutorial masonry wall panel tutorial plate finite element example problems. The stem is a vertical cantilever beam, acted on by the horizontal earth pressure.
Reinforced concrete sk 33 section through slab showing stress due to moment. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Adopt m 15 grade of concrete and mild steel reinforcement. Stahlton flatslabs can be used for cantilever balconies as permanent formwork. Design of reinforced concrete structures ii twoway slabs 8 c.
Manual for design and detailing of reinforced concrete to. Purpose of building residential f ck 25 mpa f yk 460 mpa concrete cover 25. Examples to eurocode steel design to en 1993 bs en page. The example calculations are made here using mathcad. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. The deck may consist of 3 girders spaced at 2, 45 m. Department of mechanics, materials and structures english. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is useful. Solved example a cantilever slab 200 mm thick is 1. Stahlton flatslabs typically are placed at 1200mm or 2400mm module and come in 25mm depth increments from 75mm to 150mm deep. Assuming that the allowable bearing pressure of the soil is 120 knm.
I would like to know if somebody knows of a method suggestions, text or resources to design a cantilevered concrete slab that is going to be supported on masonry shearwalls. You can design a single span simply supported, fixed or cantilever or many continuous spans. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Pdf shear capacity of reinforced concrete slabs under. They are projections from wall face of lintel beams or floor slabs. Even while designing they are considered as one slabs with cantilever fixed or continuous at supports. Design of reinforced concrete structures ii twoway slabs. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. They are made on a long heated steel bed to allow units to be made in any achievable length, shape and thickness. These design methods are discussed in detail in allowable stress design of concrete masonry, tek 147a, and strength design of concrete masonry, tek 144a refs. The name blue book is renowned worldwide amongst engineers, researchers, and building officials. Punching of flat slabs design for shear at th e column heads 12. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is useful for practical purposes. Design of cantilever slab spreadsheet engineering books.
General reference risafloor online help release notes tutorials verification problems. This spread sheets is useful for design of cantilever slab as per is 456. The cantilever retaining wall shown below is backfilled with granular material having a unit weight. Design of strap or cantilever footings a strap footing is used in the following two cases 1. Worked example 2 design of concrete cantilever retaining.
Design of slab examples and tutorials by sharifah maszura syed mohsin example 2. A stair is to be designed to span a large vertical distance by dividing it into smaller vertical distances, called steps. Continuous one way slab figure 1 shows a clear area of 12 m x 8. Recommended stem designs for reinforced cantilever retaining walls with no surcharge are contained in tables 1 and 2 for allowable stress design and strength design, respectively. Reinforcement is provided on earth face along the length of the toe slab. Point load this problem is designed to demonstrate how to check the ability of a composite slab to carry a 3000 lb point load over an area of 4. The element transfers positive and negative bending moments and shear forces. Using aashto lrfd bridge design specifications 4th ed. Ce 437537, spring 2011 retaining wall design example 3 8 3. Crosssections can include a combination of rectangular, i, t and lsections, and spans can have constant or tapered sections.
Program scope, design assumptions, design methodology, program limitations, description of inputoutput, hardware requirements. Different types of shear reinforcement used at column heads. Assuming that the allowable bearing pressure of the soil is 120 knm 2, the. Structural design of cantilever slabs solved example. Two different forms of fonts are used throughout the example. Eric j smith cantilevers writers studio over forested hillside in connecticut. My telegram channel only for civil engineering study to click this link for joining i have designed of cantilever slab part11 rcc1. Design of strap or cantilever footings falmatasaba.
A stair is a system of steps by which people and objects may pass from one level of a building to another. Comprehensive design example for prestressed concrete. Some of the functional requirements of staircases are. The slab is supported on beams of size 225 x 500 mm spaced at 4. The trial depth is selected based on spandepth ratio of 7, as in is. Design of cantilever slab spreadsheet download link more from my sitevoided twoway slab design based on aci 31814 spreadsheetdeck toggle navigation about us. These projections, which are provided for reasons of economy and aesthetics, are referred to in this book as cantilever slabs or cantilever overhangs. Analysis and design of slabs one way civil engineers pk. Slabs are usually used in floor and roof construction. If slab is supported on all four sides and r shorter side longer side documentation available.