Since all section properties are available, the EOR is able to calculate stresses for all loading conditions. The trapezoidal slabs, having the local designation YKB-539-3 have a bottom width of 460 mm and top width of 440 mm. 10 Hollow Core Slabs Allowable Superimposed Service Loads, Pounds per Square Foot 28-day Compressive Strength = 6,000 psi Non-Composite Span (ft) 28 29 30 31 32 33 34 35 36 37 38 Point load remains as point load itself, after transformation. Agree with BA and Koot. You would have make the top plate large enough and thick enough to transfer the load to the 2 "webs" rather than rely on th The safety, security, and high fire resistance it offers keep insurance rates low as In addition to the issues Ingenuity mentioned, one thing you'll need to watch out for with point loads is longitudinal splitting of the plank. The Solid Shear Wall Panels. About 15 slabs with 5 to 2.5 meters spans and with 200, 250 and 300 millimeters in depth, This moment corresponds to a thick hollow-core units. The PCI Design Handbook (or CPCI Manual in Canada) provides a method for determining the effective width (load distribution) for point loads on hollowcore. You would need to know information about the plank first, like number, diameter and grade of strands, etc, then look at the section/plank capacity This can however be enhanced up to 2 hours. The process begins with design of the slabs according Is the precast panel manufacturer still in business? If so, they may have some information and guidance, but as mentioned previously, this may be a Solid Foundation Wall Panels. The Hollow Core slab is manufactured in a standard 4 width and 8, 12, In 400-mm hollow-core slabs, this rate might be pretty much as high as 55.6. Hollowcore Slab Precast Slab Depth (mm) Structural Topping Depth (mm) Total Depth (mm) Self Weight (kN/sq.m) Effective Spans (m) 4m 5m 6m 7m 8m 9m 10m 11m 12m 13m 14m 15m 16m 150 0 150 3.00 15.50 11.00 7.00 4.50 Microsoft Word - Flood-Precast-Hollowcore-Safe-Load-Tables_100816.docx concrete joints are cast between hollow core units. In order to determine failure load of slabs, the slabs were loaded until it reached its failure point. The size of the elements typically ranges between 600 to 2400 mm in width and between 150 to 500 mm in thickness. The longest spancan reach up to 18m Add a footer 46 47. The slab in the middle is the slab where the point load is created. A load may be regarded as a centred load if the distance from this to the edge of the floor slab area is 2,5 times the width of the prestressed hollow-core slab ( 3 m). The Production Hollowcore is manufactured on long line steel casting beds using extrusion, slipforming or flow forming machines. to 15 cm and the width is 60 cm. The strength of Read More Projects. Zones where solid acts just as counterbalance are supplanted with hollows. 54 8" Hollow-core Plank + pad & carpet 73 Add Acoustical Ceiling +6 Sound Transmission Class (STC) Using finite element method, hollow core slabs with wide in-situ RC joints under point load and line loads are analysed. If there is load distributed to the next slab but there is no slab in response in hollow-core slab floors subjected to concentrated point and line loads. Holes for Services Holes to accommodate services can be pre-formed during manufacture dependent on size To clarify, my "punching shear" estimate above was actually based on distribution to the two adjacent webs and then one way shearing through those No connection was made at the supports. 1200mm wide and 200mm thick Floor Slab of hollow core Reinforced with tensile steel cables 25MPa minimum concrete strength at de-tensioning Service load of 5.0 kN/sqm at a maximum span of 8m long Service load of 7.5 kN/sqm at a maximum span of 6m long One hour fire rating. Using finite element method, hollow core slabs with wide in-situ RC joints under point load and line loads are analysed. An extensive computer generated parametric study was used to accurately analyze the responses. A 4000-psi sand and cement mix was used to grout the keyways 8 days prior to testing. Point load Slab load There are two methods to create slab loads: Create Select the object that will get slab loads Create to selected Select object (s) or component Press "Create to selected" Area load Creation: Select the object or component to set the plane of the load Pick the first corner of the rectangular area load 1 were fabricated. Sincehollowcore slabs are normally designed to be uncracked un- der service loads, the effects of cracking will not be considered here. Table 2.4.1 includes multipliers for determin- ing the long term effects for superimposed loads. The process begins with design of the slabs according to project requirements, through bed planning, manufacture, curing and removal to the stock yard. However,extensiveinplanttestinghasbeencon- ducted by hollow core producers which may al- low less conservative criteria to be used because of the unique characteristics of a particular slab. 3.2 Load Distribution As demonstrated in Chapter 2 of this manual, hollow core slabs are designed as individual, one way, simple span slabs. 8" Hollow-core Plank 28 8" Hollow-core Plank + " wood block flooring adhered directly 47 8" Hollow-core Plank + 0.058" vinyl tile 50 8" Hollow-core Plank + quarry tile w/reinforced mortar bed with 0.4 nylon and carbon black spinneret matting. Primarily used for floors and roof decks, Thiscanbeminimizedbyprop- er curing techniques and low shrinkage concrete. Design of hollow core slabs for composite ac- tion is usually limited to a horizontal shear strength of 80 psi (0.5 MPa) according to section 17.5.2.1 of ACI 318-95. International Journal of Concrete Structures and Materials This paper provides the engineer with a simple design method dealing with situations arise where in-situ reinforced concrete joints are cast between hollow core units. The slabs were 1.2 m in width, 7 m in length and either 200 or 400 mm in depth. Hollow core slabs are available in various range of depthslike 160, 200, 265, 320, 400, 450 and 500mm slabs. In the cross part of hollow-core slabs, concrete is utilized just where it is really required. ports being two 8 in. In other instances, the production of the unit does not include prestressed steel wire. In addition, Thanks for the help. The point load 10,000 lbs on one bolt. I called the manufacturer still waiting to hear back Abstract: This paper provides the engineer with a simple design method dealing with situations arise where in-situ reinforced concrete joints are cast between hollow core units. You'll also Sixteen hollow-core slabs having the geometry shown in Fig. To be considered as restrained: c1+c2< 0.0025 for normal weight concrete c1+c2< 0.0010 for lightweight concrete Example: Determine maximum value of c1+c2for normal weight hollow Hollow-core precast concrete helps manage heating and cooling demands, resulting in reduced energy costs. Dcon Hollow Core is a hollow slab system aiming to increase cross-section performance which is reinforced with the prestressed wire that can be used in residential buildings, small to large commercial buildings and industrial plants, Hollow Core has different thickness to choose from 8 cm. The total sum of the percentages must be 100%. SLAB 3 BONDED STRUCTURAL TOPPING DEAD LOAD WEIGHT WITH TOPPING = 87PSF 4 BONDED STRUCTURAL TOPPING DEAD LOAD WEIGHT WITH TOPPING = 99PSF SECTION PROPERTIESSECTION PROPERTIES A = 667.9 in2 I = 5060 in4 Yt= 4.163 in Yb= 4.837 in b = 35.63 in wt = 87 psf A = 759.1 in2 I = 6814 in4 Yt= 4.602 in Yb= 5.398 in b = 35.63 in wt = 99 psf Mn ft Hollow core slab is a complex Contoso Ltd. four-point load test. High Load Capacity Hollowcore floors can be designed to support the heavy loads required in most factories, warehouses and storage buildings. The 110 mm deep slabs are intended to carry a 3 kN/m 2 load over a span of 3900 mm which corresponds to a moment of 2.9 kNm. For example, in 200-mm hollow-core slabs, 49.9 percent of the cross-segment comprises voids. I agree with BA. You've only got about 4500 lb punching shear capacity here, not including any uptick for precompressiom. I like to debate structur The ends of the slabs were simply supported. precast pre-stressed hollow-core slabs (PPHC), using various (a/d). General Features. Fire Resistance All slabs have 1 hour fire resistance. I would be surprised if the manufacturer agrees that such a heavy load can be safely carried in the way you have indicated. Hollowcore planks have Several methods were proposed by researchers and engineers for analysis and design of hollow core slabs, among them orthotropic plate theory In addition, some important behavioural characteristics Using finite element method, hollow core slabs with wide in-situ RC joints under point load and line loads are analysed. Can the GIRDER-SLAB system be designed for point loads or non-uniform loading? Abstract To clarify the interaction of shear and torsion in prestressed hollow core slabs, 15 load tests on single prestressed hollow core units were carried out. Download scientific diagram | Load-deflection relationship of hollow-core slab (Core Diameter 150mm) with variation of (a/d) ratio. Production Hollowcore is manufactured on long line steel casting beds using extrusion, slipforming or flow forming machines. The two basic design parameters considered for hollow core slabs are flexure and shear. De- sign for flexure is straightforward with the effec- tive load resisting width being a function of the span length. Contoso Ltd. ACTIVITY-2 Calculation of loads Add a footer 47 1. Insulated Foundation Wall Panels. For loads between the edge and the centre, the load percentages can be determined by linear interpolation. risk assesment for load test of hollow core slab hazards sno activities potential risks who might be affected initial risk assesment rating p r(1-5) s r (1-5) r r(pxs) preventive control measures Using finite element method, hollow core slabs with wide in-situ RC joints under point load and line loads are analysed. Dead load Dead load of the walls Dead load of slab Floor finish Total dead load of slab 2. They are also generally 120 cm wide and have a standard thickness of between 15 cm and 50 cm depending on the producer and site requirements. 1200MM X 200MM HOLLOW CORE FLOOR SLAB.
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