Hollow block slab design pdf

Design of hollow block slabs 1 input data name of project type of project 2 office building type of flour 1 floor flour number slab number 1 l m 11 b m 11 the minimum ts cm 35 size of blocks 7 special blocks 120 ts cm 7 b cm 12 type of slab 2 two way slab number of blocks in depth 2 1 11assume t cm 37. Dec 27, 2016 dec 27, 2016 hordy slab hollow block slab. Pci manual for the design of hollow core slabs second edition by donald r. A wide variety of concrete hollow blocks molds with design options are available to you, such as yes.

Design of slab for flexure 067 m unit width of slab. Behavior of one way reinforced concrete slabs with styropor blocks. The allowable load is usually governed by the ultimate capacity of the section. Pdf assessment of cost variation in solid and hollow. Please practice handwashing and social distancing, and check out our resources for adapting to these times. Oneway concrete slab action is assumed in a ribbed slab with joist beams made of the precast doubletee section, in the ribbed floor with integral beams, and also in hollowblock or hollowcored slabs. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j.

As a design aid, the ultimate moment capacities in governing criterion for short spans may be the horizontal shear stress between the plank and the topping. Ribbed slab hollow block slab hourdi block different sizes 4. The design procedure separately incl udes determining thickness of slab under wall load. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. The top block was cast in the laboratory directly on the bottom block using a concrete strength that would typically be encountered in toppings.

A 120mmthick slab with a minimum rib thickness of 125 mm for continuous ribs is required to achieve a 2hour fire rating. Crcm manual 4 crcm means concrete rib construction method, the word method, can create confusion, because the icc ibc uses such word in the section 1701. Find the following parameters for design moments in step 2 per unit width step 4 note. Details name hollow block slab design pages 120 format pdf size 1. Hollowcore slab details drawing labels, details, and other text information extracted from the cad file translated from spanish. It is a faster and easier construction system, when compared to the other conventional construction systems. Sketch on hollow pot slab plan slab dimensions hollow pot slab width, b 3. In case of ribbed slab the blocks are not permanent. Pdf comparison study for various structural slab systems. Reinforced flat slab design spreadsheet flat slab system is an important division of concrete floor system. The lateral loads are independently resisted by shear walls. Also explore the seminar topics paper on bubble deck slab with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Hollow blocks are used to fill portions of the slab thickness. Hollow block slab building, masonry infill walls, pushover.

In case of hollow block slab voided blocks are placed to reduce the total weight of the slab. The slab was assumed to be an interior panel in a building with over 3 panels in either direction. The study also shows that the cost of insitu solid slabs are higher than that of hollow slab which is an indication that solid slab construction is more expensive than hollow slab construction. Figure 4 end bearing on block abutting tie across scale n. This study describes a design comparison and costs between the solid slabs and hollow block slabs for the roof of a threestory building. Al manaratain hollow blocks are manufactured in compliance with bs standard as specified by the project specification and the requirements. A reinforced concrete slab is a crucial structural element and is used to.

Chapter eight design of oneway slabs 11 there are two main types of ribbed floors a hollow block floors and b moulded floors as shown in figure 8. This highly successful, innovative design offers versatility for apertures, irregular shapes and down lighters. Bubble deck slab seminar report, ppt, pdf for civil. It is also found to be a costeffective disaster resistant construction system. Explore bubble deck slab with free download of seminar report and ppt in pdf and doc format. The reinforcement is located between the blocks inside the ribs. Estimating the economic quantities of different concrete slab types. Hollowcore is an extruded, prestressed concrete slab with continuous voids to reduce weight and cost. Construction of a production slab area a flat concrete slab, big enough for at least one days production, is required. The dead load for the hollow block slab is given by. Pci manual for the design of hollow core slabs and walls. Description of original building the case of study original building is a reinforced concrete hollow block slab building which can be used as a commercial one, the building is not designed according t o seismic standards.

The blocks are considered as nonstructural element as they do not contribute to strength of. The basis of design justifies this advance in utilization. This paper deals with the problem of optimum design of reinforced concrete twoway ribbed waffle slabs using genetic algorithms. Each type of floor consists of number of reinforced concrete ribs. Pdf behavior of one way reinforced concrete slabs with. Hollowcore slab dwg detail for autocad designs cad. If they are integral to a poured in place slab, create it too, then cut it with your the hollow block families that you placed.

Twoway joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf. The abovegrade masonry walls of the singlestory ohio case study home were built with 8inch thick hollow core block. Blocks are the main constituent for the construction technology, we manufacture as per the standard dimensions with uniform, durable and economically. Css has over the past 10 years and over 100 projects, provided our company, chalkline construction, with a holistic service incorporating engineering, design, slab supply and professional advice. Allowable live loads for longspan, heavily reinforced sections are. Pdf investigating the effect of solid and lightweight. Test of a hollow tile and concrete floor slab reinforced in. What is waffle slab and hordy slabhollow block slab.

The abovegrade masonry walls of the twostory minnesota home used 6inch thick hollow core blocks with the addition of vertical steel reinforcement bars. The abovegrade masonry walls of the twostory minnesota home used 6inch thick hollowcore blocks with the addition of vertical steel reinforcement bars. Twoway joist concrete slab floor waffle slab system. Pdf behavior of one way reinforced concrete slabs with styropor. Figure 5 side bearing on block half bearing tie up scale n. Floor voids and penetrations are available, trimmer beams can also be used. Hollowcore slabs with castinplace concrete toppings. The construction of hardy slab involves formwork installation, hardy block. The oneway ribbed concrete slab is economical when its used in the modular or prefabricated form. Create a family representing your precast hollow block, or a whole row of them.

In general, it is seen that in solid slab a portion of concrete below the. Jul 02, 20 introduction hollow block and ribbed slabs are formed by placing blocks on the slab and concrete ribs. Jan 11, 2019 details name hollow block slab design pages 120 format pdf size 1. Reinforced concrete hollow block slab is designed to reduce the dead load of slab. Pdf the problem of reducing the selfweight of reinforced concrete structures is. They have always been extremely approachable and keen to offer sound solutions to any challenges we encounter on site. The abovegrade masonry walls of the singlestory ohio case study home were built with 8inch thick hollowcore block. Pdf in the design of reinforcedconcrete buildings, solid and lightweight hollow block slabs are commonly preferred. Furthermore, precast concrete hollow block slabs exhibit excellent structural integrity, improved sound and heat insulation, and allows for. Load carrying capacity of hollow concrete block masonry column. Pci manual for the design of hollow core slabs and walls, 3rd edition free pdf download mnl12615 this manual presents in detail design of hollow core slabs for gravity and lateral loads.

But crcm uses concrete a material used more than 3,000. Slope normally block production is carried out in the open, and the. Hollow block slab design civil engineering community. Figure 6 precast slab bearing on concrete beam all connection illustrations below are used for concept design only. Height of hollow block, h mm topping to be placed on top of hollow blocks, t mm 01 0635 as 5102001 design of hollow pot slab ly lx rib plan view of a hollow pot 457 205 h. This service and product knowledge has proven invaluable to our company.

As a guideline, a slab 50m2 in area is suitable for a production of 1 000 bricks or 200 blocks per day. This paper aims to evaluate the optimum thickness and rebar percentage of solid, hollow block, flat slab and waffle slab based on the simplified design methods. Comparative analysis of hollow clay blocks and solid. The design of hollow clay blocks slabs depend on the fact that concrete in tension below the neutral axis. The main objective of this report is to present different structural flooring that are intended to be considered by the structural designers in the design efforts during the different coming design development stages for the project of thakher city. Design recommended calculations be based simply on supported spans. Hollow core concrete concrete hollow core floor slabs. Twoway concrete floor slab with beams design and detailing design the slab system shown in figure 1 for an intermediate floor where the story height 12 ft, column crosssectional dimensions 18 in. Pdf investigating the effect of solid and lightweight hollow block. This system can be used for basement, first floor and roof slabs. Hollow core slabs are precast, prestressed concrete elements that are generally used for flooring for both commercial buildings and homes.

Reinforced concrete hollow block slab is designed to reduce the. The tongueandgroove panel could vary in size based on the design. Investigating the effect of solid and lightweight hollow block slabs on. Concrete floor slabs on grade are subjected to a varie ty of loads and loading conditions.

Hollowtile slabs are still built in some places, but only where the cost of. Only semiskilled labour is required for this type of construction. In addition the thickness of the block material above its void should be not less than 20 mm nor less than onetenth of the dimension. Hordy slabhollow block slab hollow blocks are used to fill portions of the slab thickness. In addition, the scope of this study is to design oneway ribbed slab and twoway.

In the design of reinforcedconcrete buildings, solid and lightweight hollow block slabs are commonly preferred. Waleed abo elwafa mohamed, seismic capacity of rc hollow block slab bu loglqj 2. Hollow blocks have a minimum crushing strength of 3. For purposes of analysis and design, a unit strip of such a slab cut out at right angles to the supporting beams, as in figure 2, may be considered as a rectangular beam of unit width, with a. Reinforced concrete sk 33 section through slab showing stress due to moment. Introduction hollow block and ribbed slabs are formed by placing blocks on the slab and concrete ribs. Concrete slab types construction, cost, and applications. Mnl126 manual for the design of hollow core slabs free pdf. A complete revision of the diaphragm chapter includes the latest design information.

Prepared for the pci hollow core slab producers committee john e. Precast concrete design 85 for seismic design categories c through f, standard section 12. Prestressed rib and block precast suspended slabs have a proven track record of over 40 years. The electrical slab boxes, which are the same size as the concrete slab blocks, allow for down lighters anywhere in the slab and the electrical conduits to be positioned correctly. Hollowcore is very economical and provides great design flexibility. Figure 3 end bearing on block half bearing tie up scale n. Improved sound and heat insulation further enhance this system. The design procedure includes determini ng slab thickness based on moving live loads and then checking adequacy of slab thickness for stationary live load. The design calculations for all slab specimens are based. Optimum design of reinforced concrete waffle slabs alaa c. Then, in the project, place them on a level just as you would in real life. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. It is primarily used as a floor and roof deck system. Clear all rubble on ribs and blocks and wet slab thoroughly.