This spread sheets is useful for design of cantilever slab as per is 456. Full beam design example cee 3150 reinforced concrete design fall 2003 design the. Threespan continuous curved tubgirder bridge these topics and design examples are published separately for ease of use, and available for free download at the nsba and fhwa websites. Pt designer is a computer program for the design and analysis of linear posttensioned concrete floor systems. A 2 2area 2 a c 2 2 posttensioned concrete design table 11 list of symbols used in the aci 31808 code cp area enclosed by the outside perimeter of the section, in a g gross area of concrete, in a 2 l total area of longitudinal reinforcement to resist torsion, in a o area enclosed by the shear flow path, sqin a oh area enclosed by the centerline of the outermost closed. Structural design of a reinforced concrete balcony slab to bs 8110 design of reinforced concrete balcony with dwarf wall. The slab is supported on beams of size 225 x 500 mm spaced at 4. Punching of flat slabs design for shear at th e column heads 12. Design and analysis of retaining walls 3 f crib walls or coffer dams are cells or units to be filled with soil or builtup members of pieces of precast concrete or metal and are supported by anchor pieces embedded in the soil for. The basic design precepts employed in cantilever walls include considerations of dead man tiebacks, taking active pressures to the bottom of the wall and considering any reductions in passive resistance for inclined slopes.
The typical reinforcement details of a cantilever slab would be something like this. Basic design criteria concentrically loaded d2 all sides c critical section for twoway shear b critical section for oneway shear a critical section for flexure outside face of concrete column or line midway between face of steel column. If slab is supported on all four sides and r shorter side longer side slab. Cantilever retaining wall sheet excel civil engineering. Continuous one way slab figure 1 shows a clear area of 12 m x 8. This is an extremely popular system offering benefits that include zero lot lines, a vertical wall face and a. Practical structural analysis and design of residential buildings using staad pro v8i, csc orion, and manual calculations. Slabs and flat slabs lecture 5 19 th october 2016 contents lecture 5 designing for shear in slabs including punching shear detailing solid slabs flat slab design.
Recommended limiting values for composition and properties of concrete ref. Member minimum thickness, h simply supported one end continuous both end continuous cantilever solid oneway slab. When zd is determined, the prestressing force required to balance an. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. There are no hard and fast rules when a cantilever slab be supported by a cantilever beam. In any span, the max cable sag, zd depends on the concrete cover requirements and the tendon dimensions. Download the full calculation sheet from the link below. Hello in this video cantilever slab is design as per is. Analysis and design of slabs one way civil engineers pk. Slabs are usually used in floor and roof construction.
Threespan continuous straight tubgirder bridge design example. Civilax is the knowledge base covering all disciplines in civil engineering. Depending on the boundary condition and the properties of the slabs, methods of finding bending moment is expressed in the bs 8110 part 01 as follows. Manual for design and detailing of reinforced concrete to. Design of reinforced concrete structures ii twoway slabs 8 c. Oneway and twoway slabs university of asia pacific. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. The first stage of the design is finding the bending moment of the slab panels. The trial depth is selected based on spandepth ratio of 7, as in is. 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 reinforced concrete structures ii twoway slabs. Slabs having supports on less than four sides can be designed as oneway. Different types of shear reinforcement used at column heads.
They are projections from wall face of lintel beams or floor slabs. Using aashto lrfd bridge design specifications 4th ed. What are the typical reinforcement details of a cantilever. Deflection generally governs design for cantilever walls more than 18 feet high. Reinforced concrete design to bs8110 structural design 1 lesson 5 5 4. Appendix a examples colorado department of transportation. Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1. They may be supported on two opposite sides only fig. Department of mechanics, materials and structures english. Oneway slabs normally design as a beam with cables running in the direction of the span at uniform centres. Strength and deformation characteristics for concrete ref. Minimum thickness of nonprestressed oneway slab normal weight concrete and grade 60 grade 420 reinforcement.
I85 atlanta, ga design a structure to support a sign 22 ft. Structural design of cantilever slabs solved example. The design examples provide coverage of all applicable limit states. Manual design of beam and raft foundation to eurocode 2 pdf references ubani o. Pt designer design of posttensioned concrete floors. D6 building on strong and safe foundations d foundation analysis and design examples p wwrfv q h gc pwwrf windward roof 400. Concrete pool design spreadsheet based on aci 31814.
The program is developed around the robust computational core of two popular programs ptdata. Structural design of a reinforced concrete balcony slab to. Reinforced concrete design to bs8110 structural design 1. Design example 1 cantilevered overhead sign support truss with post problem statement. Purpose of building residential f ck 25 mpa f yk 460 mpa concrete cover 25 mm height of block wall 2. Pdf cantilever slab design ramjan shehzaad academia. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is.
Calculation example frame analysis uniform load calculation example find the center of gravity surface calculation example design bolted connection of tension plates ec3 calculation example cantilever beam, temperature change calculation example undamped free vibration part a. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Reinforced concrete design 1 design of slab examples. Moment of inertia method i gross concrete section only find moment of inertia of gross concrete section see table 11. Instructional materials complementing fema p751, design examples reinforced concrete footings. Design of cantilever slab civil engineering youtube. Design of cantilever slab spreadsheet engineering books. Where tl tension lap cl compression lap ta tension anchorage h slab thickness lc cantilever length ls length of adjacent span as calculated reinforce. Even while designing they are considered as one slabs with cantilever fixed or continuous at supports.
A slab strip of unit width is analysed using simple beam theory. Design of slab examples and tutorials by sharifah maszura syed mohsin example 2. Pdf design envelopes for cantilever slabs to resist. Design example 1 cantilevered overhead sign support. The distance from the center of the upright to the center of. Voided twoway slab design based on aci 31814 spreadsheet. Design of cantilever slab spreadsheet download link more from my sitevoided twoway slab design based on aci 31814 spreadsheetdeck toggle navigation about us. Cantilever retaining wall sheet excel web share 20161018t23. Slab design is comparatively easy when compared with the design of other elements. Threespan continuous curved igirder beam bridge design example. Net, which many engineers have come to trust over the years for its accuracy and flexibility. Cross sectional constant defines torsional properties c x. Solved example a cantilever slab 200 mm thick is 1. Design of cantilever slab civil engineering community.
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