The structure in the tower and the podium varies between flat slabs, steel structure for wide spans, a huge shear wall around the tower's core, etc. Compute moments using suitable methods such as ACI Coefficient Method. In multifamily residential structures, a concrete Podium Slab typically acts as both a structural floor and as a transfer slab for wood and light gauge steel framed construction above. d: effective depth of the slab needed to withstand moment, b: width of the slab, 1m (12inch) slab strip is considered. Apartfrom slabs that are loaded heavily for instance slabs carry several meters ofsoil, the slab thickness is selected based on deflection requirements. Long Spans Also referred to as pedestal or platform buildings, this type of construction 3 0 obj
How to Design Continuous Beam and One-way Slab using ACI ... Types of Foundation for Buildings and their Uses [PDF], Methods of Rainwater Harvesting [PDF]: Components, Transport, and Storage, Compressive Strength of Concrete -Cube Test [PDF], Procedure, Results, 16 Types of Heavy Equipment Used in Construction, Standard Size of Rooms in Residential Building and their Locations. For example, one-way slab thickness calculation is different and easier from that of two-way slab. Mrs. Chillal June 30, 2019 Reply. The framing members above the podium are often not coincident with the framing below. Usually these slabs are situated above parking levels and as such require higher fire ratings and reduced sound transmission. from slabs that are loaded heavily for instance slabs carry several meters of Please enter your email address. My response to the OP's question remains as before, KLL*AT = 1*4*30*30 = 3600 SF. Podium designs are one way to maximize the number of stories, increase unit density, and lower construction costs. Wrap-around 3. �T�#Hs R�*K For a 121.1C (250°F) temperature rise, a 76.2 mm (3-1/2 inch) thick slab gives a 1-hour fire rating, a 127mm (5-in) slab offers a 2-hour fire rating, and a 152.4mm (6-1/4 inch) slab provides a 3-hour fire rating. The code-prescribed fire resistance rating is typically 2-hours or 3-hours. Sorry, you do not have permission to ask a question, You must login to ask question. R: flexural resistance (MPa) computed using the following expression: W: ultimate distributed load equal What is piping technology for termite treatment in building? Match the new driveway level with the existing garage slab and sidewalk. soil, the slab thickness is selected based on deflection requirements. When a concrete slab is stressed by the post-tensioning method, it means the However, the OP was concerned about the design of the podium slab. <>
how to prevent. I am designing a Post-Tensioned Podium slab (concrete slab with 4-story wood construction ontop). Typically, you’ll start with a slab key plan that shows the anchor bolt locations. This screed is laid over set RCC slab after applying the bonding agent NITOBOND over RCC slab of the podium. Usually these slabs are situated above parking levels and as such require higher fire ratings and reduced sound transmission. The two-way flat plate slab is simply a slab of uniform thickness directly supported on columns, and it is generally suitable for relatively light loads. thicknesses are controlled by the danger of heat transmission during fire. These values can be used provided the slabs are not supporting or attached to partitions or other structures liable to be damaged by large deflections. "Streses and Stains in Rigid Pavements" (Lecture Notes 3) - by Charles Nunoo, Ph.D., P.E. thick or less); and Flatness tolerance: FF or gap under straightedge, depending on the floor profile class. Which instrument is widely used for surveying? How can we use magnetic levitation method in civil engineering? The composite properties of the system have been compromised because the total thickness is 9.25” instead of 10”. and determined to be acceptable. The reduced topping thickness might provide insufficient cover for the aggregate and reinforcement, and is more vulnerable to spalling and delamination from the NiCore™ Plank substrate. <>
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Get in Touch. the temperature of the unexposed surface to rise by a given amount, generally 121.1C The thickness of the Flat slab is minimum 8″ or 0.2m. %PDF-1.4
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Become VIP Member. Podium Each configuration offers advantages, and each can be used to achieve a different level of density. x�����-Kn��H�Յ�я(�%�Sl'sl��_�կA^�3oQ��A�?V�溜�Zkqw� K8}���Y,rq����ה?�������ÿ����?�?�����^�����}m籷�������?�-�����u?>>����.S��%=� �E���GҞO������3HϽ��ܓH�VTz]i���m�#J� �uWi.�JK VIP members get additional benefits. Use a drop panel to thicken the slab adjacent to the column. supported slabs; L/24 for slabs with one end continuous; L/28 for slabs with both This method is applicable for different types of two-way slabs such as flat slab, flat plate, slabs on beams, slabs without interior beams. Field Density of Soil by Rubber Balloon Method. To see the details of computing minimum slab thickness, please click here. <>
Calculate trial factored loads based on the slab thickness estimated based on deflection requirements. Thickness of slab = 250 mm Dimension of column = 450 x 230 mm Reinforcement of slab in the longer direction = H16@150mm (A s,prov = 1340 mm 2) Reinforcement of slab in the shorter direction = H16@175mm (A s,prov = 1149 mm 2) Grade of concrete = C30 Yield strength of reinforcement = 500 Mpa Concrete cover to slab = 25mm Thickness tolerance: +3/8 in. to 1.2*dead load plus 1.6*live load. VIP members get additional benefits. �T�es��,)lNP�%m)J{�es��,�ނ��U��9AU =���E�bs�u.�V�.���}�*�[�%H�t��o%H{�A�[W�Y�JϬҶ�(=� �I�mۃ4� MeWi�A��(��m��>�V� -5H+�n��W`�g�� m��&�W`�#H�}J����yz�%���]�K����?���gX�����i��#hA�j��絤�&i��-H�{Z�R���xI��ۮ�t�G?u��b�^.����/���z�(�=HS��s/-i������)J�X�I��[kَ%m�x�,Cڲ�NP�%=j�NUYR�QH� �����9�*KZ�(ݢt�?UeIK�yR�Q�%Mg��(�截,��T�TeJUsDU MA�k��截,�qD���Q�%�K��=H�9���t�Ӹ. For I've worked on a few high rises, and slab thickness pretty much stays the same beyond the transfer slab. 5 Ebor Court, Randall Park Way, Retford, Nottinghamshire, DN22 7WF 0800 242 5589 [email protected] Office Hours: Monday to Friday 08.00 – 17.00 Online Chat 24/7 Given: Span length along X-X direction = 30’ (9.14 m) Span length along Y-Y direction = 26.25’ (8.0 m) Slab thickness = 8 in (203 mm) Similar to the one-way slab, the thickness of two-way slab should satisfy deflection and shear requirements. This may be counterproductive because the weight of the slab may increase shear force significantly. Unrestrained Beam Thickness Tables Restrained Beam Thickness Tables Description: UL Link: UL PDF: CAD Drawing: All: MK6GF: Z106HY: All: MK6GF: Z106HY Protected Floor/Ceiling 2 1/2" NWC/LWC, Fluted/Cellular: UL D739: PDF: DWG: D739 Unres All: D739 Unres MK6GF: D739 Unres Z106HY: NA: NA: NA 2" NWC/LWC, Fluted/Cellular UL D743: NA: DWG: D743 Unres All ... at least the depth below slab. unless deflections are calculated The slab thickness chosen must be adequate for shear at both interior and exterior columns. for podium and tower floors was 30 cm thick. You will receive a link and will create a new password via email. If the slab’s shear strength is less than ultimate shear imposed on the slab, then required strategies shall be considered to tackle the problem. Tuck-under/walk-up 2. All Rights Reserved. This design example uses the term “podium slab” which, while not a term defined in the 2012 International Building Code (IBC) or 2013 California Building Code (CBC), is included in the commentary to §510.2 in the 2012 IBC (509.2 in the 2009 IBC). If a proper procedure for the calculation of a slab thickness is followed, the design period would be cut considerably, in addition to reaching reliable and economical slab thickness. endobj
This type of structure has many advantages for the owner, including more head height for the garage under the wood structure and longer spans between columns, lower cost, and, most importantly, a faster overall schedule. endobj
What is podium slab? requirements is not frequent. The slab thickness . This design example uses the term “podium slab” which, while not included in the 2006 International Building Code (IBC) or 2007 California Building Code (CBC), is commonly used in the building industry. Nationwide, there has been an increase in the demand for multi-story mixed-use and multi-residential structures. In multifamily residential structures, a concrete Podium Slab typically acts as both a structural floor and as a transfer slab for wood and light gauge steel framed construction above. What is the Minimum Curing Period for Concrete? Login to The Constructor to ask questions, answer people’s questions, write articles & connect with other people. Podium slabs are unique type of floor system that transfers loads from a steel or wood frame structure above the slab to concrete walls and columns below. For a two way slab, KLL =1, so Influence Area = Tributary Area. Our first project of this kind was a 140,000-square-foot, 14-inch post-tensioned podium slab. Basic Concepts of Pre-stressing: "Prestressed concrete is basically concrete in which internal stresses of a suitable magnitude and distribution are introduced so that the stresses resulting from external loads are counteracted to a desired degree. The ACI Code provides method to compute minimum two-way slab thickness which satisfies deflection. Load bearing elements such as walls and columns of superstructure above the podium slab may not align with substructure load bearing elements below. Become VIP Member, Do you need to remove the ads? Sign Up to The Constructor to ask questions, answer questions, write articles, and connect with other people. Podium Slabs 28 Parking Structures 27 28. This is an undesirable consequence. However, each also has unique requirements in terms of its structural design and detailing. 3.1 Surface Preparation Removal of all surface imperfections, protrusions, In multifamily residential structures, a concrete Podium Slab typically acts as both a structural floor and as a transfer slab for wood and light gauge steel framed construction above. Typically, the superstructure built from wood, metal studs or structural steel. (for slabs 12 in. Usually these slabs are situated above parking levels and as such require higher fire ratings and reduced sound transmission. podium slab detailing. Which type of reinforcement are used in pre-stressing? the design even if the thickness is selected based on deflection requirements. Multi-story mixed-use and multi-residential projects are usually configured in one of three ways: 1. 4 0 obj
In such bare podium one can use a spray applied highly elastomeric and puncture-resistant waterproofing coating if podium is very large or else a brush applied pitch modified polyurethane membrane coating can be used in relative smaller podium slabs. As such, the podium also serves as a transfer slab to pick up conventional bearing walls above and distribute them to the supporting beams below. <>
Title: Standard Detail Notes :-Standard Podium Deck Drainage Detail - Filcor Products :-Drg No. An isolation joint is needed where the drive is to meet these existing pavements. Sometimes, slab Determination of slab thickness based on bending and shear Apart s Thickness of slab (T-beam section), in d p Distance from extreme compression fiber to centroid of prestressing steel, in E c Modulus of elasticity of concrete, psi E s Modulus of elasticity of reinforcement, assumed as 29,000,000 psi (ACI 8.5.2) f' c Specified compressive strength of concrete, psi Estimate the deflection of the slab panel identified in part b of the figure under the follwoing conditions. Slab thickness normally ranges between 12 and 16 inches (305 and 406 mm) for non- prestressed slabs and 10 to 14 inches (254 to 356 mm) for post-tensioned slabs. 1 0 obj
Generally, the slab thickness is chosen to prevent excessive deflection in service. Design of Post‐Tensioning Building ... ‐Project below slab at least 1/4 slab thickness. Measure for elevation and double check the base to insure uniform slab thickness. Common configurations include up to five stories of residential use over retail, commercial, office, and parking occupancies, similar in configuration to the building shown in Figure 1. What are the purposes for building dams in semi-arid regions? (250°F). This type of construction is also referred to as an uppermost “structural slab” or “transfer slab” (both can have a slab … However, these requirements shall be checked in Typically, contractors use 1/4 to 1/2 inch thick premolded joint material to make this joint. To resist lateral loads, some cores and ... transfer slab) close to podium core; 3) Case 3 which simulates failure of podium edge . 5 0 obj
Other particulars of the floor system are noted in Appendix A. endobj
�g��{���U�Rڜ�*K In general, 6 inch (150mm) slab thickness is considered for residential and commercial buildings with reinforcement details as per design.