Foundation profile required this item allows two different thickened edge profiles. A monolithic or thickenededge slab is a groundsupported slab on grade with an integral footing i. The combined slab and founation, sometimes referred to as the thickened edge slab, is useful in warm climates where frost penetration is not a problem and where soil conditions are especially favorable. But what i want to do first is hit cancel, and in my project browser, i want to go down to families. The profile that we see here is literallyjust a 2d linework slab edge thickened 24 x 12so if we click the dropdown,well see we can use any profile that we want with it. Add a floor slab edge revit products 2018 autodesk. This page is about how to build a thickened edge concrete slab on grade fpsf footing on soil with a high water table to prevent frost heave, by first installing drainage below the slab. The thickened edge allows you to place a couple cont. We use the slab edge function to create a thickened slab condition where slab bears on our foundation walls. The revit structure slab edge tool allows us to create thickened portions of slabs which are typically located at the boundaries of floors. It appears one thing i could do is draw a stiffener beam to simulate the thickened edge around the perimeter and do a move to floor or move to plan to keep it out of the foundation plan, then simply uncheck foundation so the wall footings dont display. Two way punching shear concept explained and flat plate example csa a23. Edge settlement center settlement edge heave center heave. Please comment to suggest other videos youd like to see.
How to add edges to a slab ci tools knowledge base. This tool also allows multiple options for defining the size of the thicken area along with cutting the thicken area flush with the slab. Jul 17, 2017 local code authorities often specify the type and placement of the reinforcement in a monolithic slab. Thickened slab plate that represents a concrete structure in tekla structures, a slab is created by picking three or more points. The thickplate formulation is the default and the recommended option. After this publication, it was subsequently adopted by the uniform building. 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. Purpose of thickened edge for concrete slabs on grade. Allows the user to select the slab and multiple points to create the thicken area. Learn about structural design of foundations for home inspectors. It consists of a shallow perimeter reinforced footing poured integrally with the slab over a vapor barrier. Jul 30, 2016 this pin was discovered by david florez. Use reinforcing in the perimeter and wwm in the center. Concrete floor slabs on grade are subjected to a varie ty of loads and loading conditions.
Structural design of foundations for the home inspector. For example, if you are placing a slab edge on a floor, the. Powered by a sophisticated fem solver increasing capacity and substantially speeding up solution for large and complex models, spmats v8. Dowel size and spacing for construction, contraction, and expansion joints. You can place slab edges in 2d views such as plan or section views or in 3d views. Sloped 1 per 10 to door thickened edge slab 12 x 24 scale 141. Local code authorities often specify the type and placement of the reinforcement in a monolithic slab. Casting a wire mesh in the concrete reduces the chance of cracking. An interior load condition is assumed for flexural analysis. Alternatively, to apply your edge to the perimeter of your slab. The requirement is not necessarily for a thickened slab. A monolithic or thickenededge slab is a groundsupported slab on grade with an. For that applications, you are often allowed to do a thickened slab edge and use a monolithick pour. Nov 20, 2016 two way punching shear concept explained and flat plate example csa a23.
Does a concrete slab need footings below the frost line. Concrete design based on fc 2000 psf, fc 2500 psi for quality only. How to use thickening with the revit structure slab edge tool. The combined slab and founation, sometimes referred to as the thickenededge slab, is useful in warm climates where frost penetration is not a problem and where soil conditions are especially favorable. Floor slab design floors are designed as slabs on grade. Tm 580912 concrete floor slabs on grade subjected to heavy. For a split second, all the weight is less spread out and more heavily concentrated on only the edge, which could cause it to crack off. The slab normally rests on a bed of crushed gravel to improve drainage.
The slab thickness depends on the type of loads on the floor slab. Thickened slab catalog user interface for displaying or modifying information in categorized lists for example, profile catalog and shape catalog are catalogs. Best practices of concrete pavement transition design and. The diagram will resize and rescale to fit the page as it grows. Dig out the whole thing to the depth of edge depth plus another 4 inches. Thoughts on using a monolithic slab instead of footings and. Slab on grade rectangle, polygon, face with garage curb, reinforcement, anchor.
Hi all, using home design studio complete for mac 19. The design procedure set forth in that publication had at that time been in use by the author for about 15 years. 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 and edge of steel base plate typical extent of footing typical d foundation design 8. A typical installation uses 6inch by 6inch woven wire mesh, which is supported on rebar chairs so it is positioned near the center of the finished slab. Please practice handwashing and social distancing, and check out our resources for adapting to these times. The presence of rebar or wwf in a slab on grade increases confidence in the ability of. Skirt foam is typically 1 x 4 that is laid outside of the building envelope a foot or so below grade. How to create a custom profile for a mat or raft foundation footing slab edge sloped theckining. This allows the designer to maintain a constant slab depth without thickening at joints or edges. To do, this we involve an actual profile that is loaded into our model. The design procedure includes determining slab thickness based on moving live loads and then checking adequacy of slab thickness for stationary live load. An enhancement was implemented allowing the program level i.
The slab is poured thicker at the edges, to form an integral footing. A monolithic or thickened edge slab is a groundsupported slab on grade with an integral footing i. A slab on grade with an independent stem wall is a concrete floor supported by the soil independently of the rest of the building. Reinforcing steel gives slabs on grade adequate strength at the joints. Reinforcing steel in slabs on grade concrete construction. Aug 27, 20 second, the edge gets a lot more force than the rest of the slab if anything heavy is driven or pulled onto and off of the slab. Residential foundation design options and concepts.
Foundation or fpsf insulation design details for slab on grade. Thickened edges add more restraint to drying shrinkage and cost more. The slab on grade worksheet assumes a structurally unreinforced slab, aci360type b, reinforced only for shrinkage and temperature. Second, the edge gets a lot more force than the rest of the slab if anything heavy is driven or pulled onto and off of the slab. Recent enhancements safe computers and structures, inc.
Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Were going to use 36 x 12 but lets just double click on that. It just so happens that this is going to bea slab edge thickened 24x12. Backfill backfill fill concrete slab on grade 2 1 elevation at the bottom of slab. Anchor bolts shall be a307 embedded 7 minimum into concrete or masonry grout. Concrete floor slabs on grade are subjected to a variety of loads and loading conditions. We can then use that profile and the slab edge family to create the concrete haunch. A sdvosb service disabled veteran owned small business. Nov 08, 2016 dont forget to save and subscribe if you like what you see. Structural design of foundations for the home inspector internachi. Home united facilities criteria cd 1 thickenededge joint. The stem wall supports the building loads and in turn is supported directly by the soil or a footing.
Click architecture tabbuild panelfloor dropdown floor. In some cases additional footings often a thickened slab are necessary under bearing walls or columns in the center of the. The design procedure separately includes determining thickness of slab under wall load. Flat slab analysis and design free version download for pc. Designing of slabs depends upon whether it is a oneway or a two way. How to build a slabongrade with a thickened edge on standard soil there are many ways to build a slabongrade or frostprotected shallow foundation, the following is a stepbystep walk though of a thickenededge slab floor we built. Thoughts on using a monolithic slab instead of footings. Type a undoweled isolation joints allow the pavement freedom of movement laterally and an embedded fixture freedom of movement vertically, with no. By clicking the floor drop down, we can select the slab edge family. In many area of michigan the horizontal skirt foam is not needed.
This tool also allows multiple options for defining the size of the thicken area along with. The design procedure includes determini ng slab thickness based on moving live loads and then checking adequacy of slab thickness for stationary live load. That is, the concentrated post or wheel load is assumed to be well away from a free slab edge or corner. You add slab edges by selecting horizontal edges of floors. Compaction test required when fill exceeds 18, 95% minimum compaction required. Grdslab concrete slab on grade analysis spreadsheet.
Reinforcing is added to control shrinkage cracking and maximize the distance between designed joints. Thickened slabs and thickened edges excavation cee 431 construction contracting page 1 of 10 11901. This page is about how to build a thickened edge concrete slab on grade. The concrete slab on grade is the most popular foundation. The design procedure separately incl udes determining thickness of slab under wall load. Concrete foundation three types of concrete foundations. Compaction test required when fill exceeds 18, 95% minimum compactio n required.
New drafting controls have been added for drawing curved edges of area objects. The slab punching design check on the maximum shear for which stud rails or steel. The edge of a slab is generally its weakest point since it has no addedadjacent support from surrounding slab on one edge. Hello all, today i am creating slab edges for thickened slab bearing. Monolithic slab w thickened perimeter, for one thing. Type a thickened edge isolation joints do not use dowel bars, but use increased thickness along the joint to reduce tensile stresses in the slab and bearing stresses on the subbase or subgrade. It just so happens that this is going to be a slab edge thickened 24x12. Place 4 inches of compacted crusher run in entire area, then build up another 20 inches of crusher run to make the high hat center, then mesh and bar, then pour. There are many different soil conditions and corresponding slab designs. Click on the corner point while the tick icon is visible to apply the slab edge to the perimeter of the slab.
Floating slab for a cold detached garage fine homebuilding. Slab on grade foundation details building foundation. The analysis and design follow the equivalent frame analysis method of the aci code, which considers a onebay wide strip of the floor system as a continuous frame. Concrete slab volume calculator with edge and internal beams first, draw the shape of the slab. Xps or eps highdensity foam is typically used under concrete slab floors, in t. A frost protected slab, typically 4 concrete with a thickened perimeter footings rest on a variable thickness of foam. Requirements for monolithic slab construction hunker. Allows the user to select the slab plate that represents a concrete structure in tekla structures, a slab is created by picking three or more points. Creating raft foundation slab edge thickening revit. Dec 03, 2014 how to build a slabongrade with a thickened edge on standard soil there are many ways to build a slabongrade or frostprotected shallow foundation, the following is a stepbystep walk though of a thickenededge slab floor we built. We are thinking of 24deep thickened edge, rebar along bottoms of thicked edges, wwf reinforcing for the slab. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. In most cases, the slab thickness is designed as an unreinforced concrete section.
As the name suggests, a slab is a single layer of concrete, several inches thick. Creating thickened slabs linkedin learning, formerly. Starting at top left of plan, enter side lengths clockwise around slab top left to right and hit correct direction arrow to draw sides. Tm 580912 concrete floor slabs on grade subjected to. Dont forget to save and subscribe if you like what you see. I have created a family with various sizes and created slab edge types using my family profiles. Please practice handwashing and social distancing, and. You have a perimeter that is like 16 inches thick and like 12 inches wide at the bottom tapering to the 4 inch slab in the center.