Most of the technical documents and drawings available on this site are also available in the above logix 2017 design manual. In this section several typical slabongrade sections are illustrated and described. Thickened slab edge 3 with concrete curb concrete slab. General design process though many details must be included in the design of a slab on grade, three important components are slab thickness, reinforcement requirements, and joint spacing.
This study prepared a design manual for concrete slabs on grade subjected to moderate tu heavy loads. Design is defined as the decisionmaking process of planning, sizing, detailing, and developing specifications preceding construction of slabsonground. Frostprotected shallow foundations reduce costs, save. Floor slab design floors are designed as slabs on grade. Concrete slab on grade analysis calculator for post or. Figures 49 through 411, and 415 show configurations with insulation on the exterior surface of the foundation. It addresses the planning, design, and detailing of slabs. A3design examples using coe charts a4slab design using posttensioning a5shrinkagecompensatingconcreteexamples chapter lintroduction l. In moderate climates like sf the vertical insulation below the slab insulation is not required. Online concrete slab on grade analysis calculator for slab subjected to interior concentrated post or wheel loading assuming slab is reinforced for shrinkage and temperature only. Quick to build moveable greenhouse options good slab design. Aci 360, design of slabs on grade, refers to this as a type b slab. Introduction concrete slabs on grade are a very common type of concrete construction. This manual p rescribes the criteria for the design of concrete floor slabs on grade in buildings for heavy.
Ce 437537, fall 2002 slabongrade example design info 1 8. In most cases, the slab thickness is designed as an unreinforced concrete section. This manual prescribes the criteria for the design of concrete floor slabs on grade in buildings for heavy loads and is applicable to all elements responsible for military construction. The designer determines the required slab thickness after determining the controlling loads, the appropriate safety fact o r, and the subgrade modulus. The slab is outside buildings which subjected to 1 hr fire resistance and design for 50 years design life. Please practice handwashing and social distancing, and check out our resources for adapting to these times. For example, in a 4inch 100 mm thick slab the joint spacing should be about saw cut tooled wall or column expansion joint material slab on grade column contraction joints intersect at diagonals of the square form openings which will be filled after floor has hardened concrete cracks below joints slab isolated from. Shear strength of beamless slabs usually a controlling factor. The primary design issues for stiffened slabs on grade. This guide presents information on the design of slabsonground, primarily industrial floors. I have not been able to see the advantages or design procedure that would result in a little thickened slabfooting, other than some depth for anchor bolts. This report covers the design of slabs on grade for loads caused by material stored directly on the slab or on storage racks, as well as static and dynamic loads associ.
Aci 360, design of slabsongrade, refers to this as a type b slab. Reinforcing is added to control shrinkage cracking and maximize the distance between designed joints. Compaction test required when fill exceeds 18, 95% minimum compaction required. Such stiffened slabs are often called waffle slabs because of the geometric analogy with a waffle. Slabongrade with integral grade beam with exterior insulation. But the first thing i want to dois examine exactly what a thickened slab isand what it means to revit. The guide is intended to give builders the knowledge and confidence to design and construct troublefree foundations. Reinforced concrete design 1 design of slab examples. Design is defined as the decisionmaking process of planning, sizing, detailing, and developing specifications preceding construction of slabs onground.
What id like to do is go down to our level 1,then were going to treat this edge right here. Along with some space for storage, you could consider including laundry facilities, or even a pantry in that space. The slab thickness depends on the type of loads on the floor slab. Please guide me to a calculation method for a thickened slab on grade beneath a load bearing wall interior of or edge of slab. Design methods are given for unreinforced concrete. The foundation system first gained cabo model code recognition in 1995, and asce standard 3201 design and construction of frostprotected shallow foundations based on the hud design guide was issued in 2001.
Updated technical documents on this site will be posted regularly, while updated versions of the logix design manual will be posted annually. The construction and design of concrete slabs on grade d. Figure 230 transverselongitudinal overlay transition with thickened slab 29 figure 231 pavement type transition transition. This is key to your landscaping design success and it will need to. Concrete masonry is well suited for below grade applications, because of its strength, durability, economy, and resistance to fire, insects and noise. When a house has a concrete slabongrade with a thickened edge forming its perimeter foundation also called a turneddown slab edge, one no. Heavy loads in buildings such as warehouses include moving loads, stationary live loads, and wall loads. For design and site conditions that fall within the guidelines set out in this booklet, a frostprotected, slabongrade foundation can be designed and. Ce 437537, fall 2002 slabongrade example design info 1 8 design the thickness for a slabongrade concrete slab in a warehouse. Basic design criteria concentrically loaded d2 all sides. Given that you are committing a certain area of the main floor to mechanical systems, this is as good a time as any to plan some storage, and maximize the efficiency of that room. The comprehensive technical library for logix insulated. Asce, secb course content slab on grades construction. Calculators for structural engineers, construction professionals and steel building specifiers.
Tm 580912 concrete floor slabs on grade subjected to. The most common reinforcement associated with slabsongrade is welded wire fabric. This manual supersedes tm 5 80912afm 883, chapter 15, dated 1 april 1977. Foundation analysis and desing foundation design 1. Do not cantilever the material past the concrete 12. The major structural components of a slabongrade foundation are the floor slab itself and either grade beams or foundation walls with footings at the perimeter of the slab see figures 42 and 43. Fatigue failure due to slab flexure erosion failure due to foundation compression edge loads produce the worst stresses fatigue based on tensile stress due to edge loads corner loads produce the worst deflections erosion based on deflections due to corner loads 2. Background information on design theories is followed by discussion of the types of slabs, soilsupport systems, loadings, and jointing.
Information on other aspects, su ch as materials, construction methods, placement of concrete, and finishing techniques, is. Soil design parameters edge moisture variation distance. Thickened slab end set joint opening based on design requirements with the following limits. The result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete. The minimum thickness can be determined by many factors. Best practices of concrete pavement transition design and construction by youn su jung. The construction and design of concrete slabs on grade.
Where top soil layers are thick, higher cupolex can be used. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Figures 412 through 414 show variations where the slab is the primary location for insulation. Best practices of concrete pavement transition design and. Strip footings for both basementgarage slabs installed below grade and stem wall configurations, grade beams supporting below grade for either slab or stem wall interface, and haunched or thickened edge slab on grade construction. Mcenerney has requested our opinion regarding the suitability of thickened reinforced concrete slabongrade foundations for the proposed homes. Design the minimum slab thickness to support a fork lift specified below and storage racks specified below throughout. Both slab on grade and structural slabs can be created using this formwork. This study led to the creation of an airfreezing index map and the development of a design guide for the use of fpsf in the u. Design header type joints with seal snow plows or deicing, select an unarmored concrete header with seal. The modular nature of concrete masonry allows floor.
Thickened slab areas and the floor slab can be poured in one operation. Teac consulting engineers 3160 crow canyon place, suite. However, this is not the only means of reinforcing slabs. With some limitations, reinforcement for slabs can be sized using the subgrade drag theory in order to increase the spacing of control or construction joints. Development of a design manual for concrete floor slabs on grade. Pdf design of stiffened slabsongrade on shrinkswell soils. Concrete masonry is used to construct various foundation wall types, including full basement walls, crawlspace walls, stem walls and piers. This manual prescribes the criteria for the design of concrete floor slabs on grade in buildings for heavy. Dec 11, 20 thickened slab edge 3 with concrete curb. The wire reinforcing institute recommends the use of the subgrade drag theory for slabs up to 150 feet in length. A slab on grade with an independent stem wall is a concrete floor supported by the soil. Soil conditions the design procedure shown in this report is. A monolithic or thickenededge slab is a groundsupported slab on grade with an integral footing i.
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