One Psi is equal to 0.07031 Kilogram-force/Square Centimeter: 1Psi = 1Psi × 0.07031 = .07031kg/cm². Consult with the local Building Code Official . Where. 80 lb/sq ft in isolated areas is fine, but unless you know what the soil bearing and reinforcing is for that slab, you might be looking at cracking. For smaller to medium equipment - cars, smaller trucks, nominal rack loading, I used a 5" slab with 4000 psi concrete, fiber reinforcement, and air entrainment. A new structural engineer has been assigned to the project. . Minimum Embedment Depth (in.) 8 #8 bars O 12 in. You can have a concrete driveway thicker than 6 inches . A s f y = a b a 1 . 3. The stronger the slab, the more it will support and the longer it will last. conclud- Safe working loads for single installation under static loading should not exceed 25% of the ultimate load capacity. 3000 lbs on a 4x4 would have a cross section of 12.25 square inches. Engineering. Because the load spreads out, the pressure on the soil is greatest right beneath the footing. To determine how thick concrete should be for an RV driveway, you have to consider the soil's bearing capacity, the heaviest load your RV will place on the concrete and the minimum thickness standard. As the load under a footing spreads out, pressure on the soil diminishes. $30. Concrete that exceeds 5,000 PSI is used in special construction projects that require building materials that . . concrete. The concrete is normal-weight concrete. And the piles are embedded 4 in. I received the concrete mix design shop drawing for a 4000 psi and report from the new structural engineer stating that the concrete section capacity is only 1% less if 4000 psi to be used instead of using 5000 psi. A good use for this concrete is a walkway on the side of a home that doesn't receive excessive traffic. Normal Weight = 150 pcf Modulus of Elasticity = W 33 FLEXURAL MEMBERS Pavement and floor slabs in homes and business are made of concrete at 4,000 PSI and able to withstand traffic and support heavy loads. b is the radius of relative stiffness. For SI: 1 inch = 25.4 mm NOTE: 3/16" Tapcon requires 5/32" bit, 1/4" Tapcon requires 3/16" bit. I can recall in the early 1950's when 2000 or 2500 psi concrete was used in suspended slabs and beams. Khan et al. Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14) Reference Reinforced Concrete Mechanics and Design, 7th Edition, 2016, James Wight, Pearson, Example 18-2 Design Data f c' = 4,000 psi normal weight concrete f y = 60,000 psi Slab thickness = 7 in. I have been wondering how much weight an average 4" thick concrete driveway can support without the fear of damaging it. Concrete compressive strength = f ' c = 4000 psi Reinforcing yield strength = f y = 60000 psi. Located in Pequannock, New Jersey, Minimix supplies ready-mix concrete to contractors and homeowners for small and medium size jobs. A reinforced concrete column with 18x18 in square cross section supports an ultimate load, Pu = 390 kips and an ultimate moment, Mu = 220 k-ft. As the load under a footing spreads out, pressure on the soil diminishes. Order Online. To determine how thick concrete should be for an RV driveway, you have to consider the soil's bearing capacity, the heaviest load your RV will place on the concrete and the minimum thickness standard. . Do not get confused with what weight you might think or want to load the deck with. The concrete ticket below shows a 3500 psi concrete mix for 10.5 yards of concrete. $30. Table 2c gives values Kvc in kips. A common bag of concrete, for example, may have a compression strength of 4,000 psi, based on a thickness of 2 inches after it has set for 28 days. Call Now. The residential workhorse of concrete, 3,000 PSI can be used for driveways, patios and sidewalks. Add (1)+ (2)+ (3); 5. 2.93 PARTS STONE. = nominal column load capacity in concrete design P u = factored column load calculated from load factors in concrete design R = shorthand for rain or ice load R n = concrete beam design ratio = M u /bd 2 A sc f cc f sc l dh. The above strengths are based on 4000 psi. Cost. Nominal Anchor Diameter (in.) A standard residential driveway is commonly 4-6 inches . ACI Code Section 9 and 9. 18 in. u is Poisson's ratio which is set to 0.15 in this module. This problem has been solved! Secondly, how do you calculate water load on a slab? A concrete floor, with a minimum thickness of four inches can hold upto 3,000 PSI compressive strength. Strengths 3,960 and 3,745 psi are acceptable because they do not fall below 4,000 psi by more than 500 psi or both strengths exceed 3,500 psi. Safe working loads for single installation under static loading should not exceed 25% of the ultimate load capacity. Load capacities of simply supported concrete slabs: Imposed loads varies from approximately 1.5 kN/m2 (153 kg/m2) in domestic buildings to approximately 1 0 kN/m2 (1053 kg/m2) in heavy industrial areas. We also service parts of Sussex, Warren, and Hudson counties. Concrete Anchor Size (Inches) Hole Size (Inches) Embed. Typical properties of normal strength Portland cement concrete: Density - ρ : 2240 - 2400 kg/m3 (140 - 150 lb/ft3) Compressive strength : 20 - 40 MPa (3000 - 6000 psi) Flexural strength : 3 - 5 MPa (400 - 700 psi) Tensile strength - σ : 2 - 5 MPa (300 - 700 psi) Modulus of elasticity - E : 14 - 41 GPa (2 - 6 x 106 psi) Increasing the concrete thickness to 5" and adding rebar increases the compressive, tensile, and flexural strength of the driveway. Given f'_c = 4000 psi; f_y = 60,000 psi; #4 stirrup 8 #9 tension bars 1.5 inch clear distance between the two layers 2.0 inch concrete cover Determine the nominal moment capacity Determine the deign moment capacity Can this be used carry a service dead load moment (including self-weight) of 150 kip.ft and a service live load moment of 280 kip.ft? Concrete with PSI levels exceeding 3,500 is used for construction of foundations and floor slabs. 8 #8 bars O 12 in. c′=4,000 psi or any other strength (5.15) . This is a non-destructive probing method. RE: 3000 psi vs 4000 psi concrete. . The difference between the 3000 PSI and 4000 PSI concrete usually involves the water to concrete or water to the sand ratio when the concrete is mixed together. Ask about these fees so you know the . Prices per Cubic Yard. The concrete poured exceeded 3,700 psi when cured. (unfactored) dead load of 1 kip/ft plus its own dead load and it supports a concentrated. Concrete Calculator - Figure out how much concrete you'll need for your footings. The answer depends on a few things which you will need to provide: - The strength of the concrete mix. If you look closely at the invoices, you'll see I get charged $105.00 per yard for 3500 psi 3/4 aggregate mix and $114.50 for 3500 psi 3/8 aggregate mix. Good Luck, Yooper Dave Lower dead loads result, reducing the loads associated with foundation design. into the pile cap. 2002 MSJC CODE STRENGTH DESIGN CRITERIA. Assume f's = 4,000 psi and steel bars G60. Determine moment capacity per ACI 318; Maximum concrete strain = e = 0.003 Reduction factor for flexure = f = 0.90 Ratio of average concrete stress = a 1 = 0.85 Ratio of stress block depth = b 1 = 0.85. . As we know that density of Reinforced concrete is 25 KN/m3. In terms of load bearing capacity, the slab "as poured" was structurally stronger than the slab "as specified." Concrete strengthens with the passage of time. . 3.) Concrete in this range is also a good choice for things like RV pads, or wherever you expect to store heavy loads. 3. 973-970-3334. a) Compute the theoretical capacity of the column for pure axial load. I have been wondering how much weight an average 4" thick concrete driveway can support without the fear of damaging it. As you can see, heavy houses on weak soil need footings 2 feet wide or more. Concrete breakout capacity of cast-in-place concrete anchors in early-age concrete . Calculate self weight of the concrete slabs; 3. Show activity on this post. Depending on the percentage of the portions in the mix , a fully cured slab of concrete should have a compressive strength of between 2200-5000 psi. 6000+ PSI . Concrete Strength, f 'c = 4000 psi Conc. Density *Area. However, a good contractor who wants to avoid call-backs will use at least a 4000 psi mix for a driveway. now Let's find the tributary areas of a deck. Wall thickness = 10 in. Design the pile cap shown in the following figure with 12 in. (150 × . How do I calculate how much concrete I need for a slab? Question: Problem 1. Glass Fiber Reinforced Concrete. Use the listed data for concrete and steel. Concrete compressive strength requirements can vary from 2500 psi (17 MPa) for residential concrete to 4000 psi (28 . We service Morris, Passaic, Bergen, and Essex counties. The American Concrete Institute recognizes 28 days or "the test age designated for determination of the specified compressive strength."5 Therefore, when a specifier calls for 5,000 psi concrete at 28 days, this tells the concrete producer to select a mix design that will attain a minimum of 5,000 psi 28 days after manufacture. For reinforced concrete beams this can be done by the . For SI: 1 inch = 25.4 mm NOTE: 3/16" Tapcon requires 5/32" bit, 1/4" Tapcon requires 3/16" bit. It will have a . The allowable tension load should be the lesser of the allowable bond or steel strength. Performance Data for Aerosmith Carbon Steel Wedge Anchor Zinc Plated WAG12512CF and WAG34700CF 1/2" x 5-1/2" 3/4" x 7" 3-1/4" 750 1244 1366 2344 2-1/4" Concrete Compressive . This concrete batch ticked show you the ratio of how much cement, stone, and sand is used to make 4.5 cubic yards of 4000 psi concrete. 4500 psi = f' c + 1200 psi, then Minimum Compressive Strength, f' c = 3300 psi or round up to f' c = 3500 psi. 2. Concrete used in warehouses, factories, and other large-scale commercial properties often requires 4,000-5,000 psi. Ultimate Load Capacities and Allowable Loads for Threaded Rod used with SurePoxy High Modulus Systems 116, 117, HM, HM Class B, HMLV, HMLV Class B, HM GEL, HM SLV, & HM EPL 4,000 psi. Soure and learn more: What size pressure washer do I need to clean concrete? Compressive Strength Final (28-day) = 5000 psi (Precast) = 3000 psi (Topping) At Prestress Release = 3500 to 4000 psi when maximum load is used. Unit Weight, wc = 150 pcf Top/Slab Reinforcing Yield, fy = 60000 psi Subgrade Modulus, k = 200 pci Concentrated Load, P = 10000.00 lbs. Solve for a using the SF = 0. You can have a concrete driveway thicker than 6 inches . It can also be used for slab foundations and high traffic roads. Assume f's = 4,000 psi and steel bars G60. The actual weights used to make 4.5 yards of 4000 psi concrete are: 1. service (unfactored) live load of 12 kips as shown. Step 3 Add the base psi you found in step 1 to any additional psi provided by added re-enforcment in step 2. Step 4 Mark your project plans with a highlighter wherever the psi amount you calculated in Step 3 is found. The pile cap has normal-weight concrete with a compressive strength of 4000 psi and Grade 60 reinforcement. Therefore, Requirement #1 has been satisfied for all . How is PSI Determined in Concrete? Standard 6 × 12 in. Because the load spreads out, the pressure on the soil is greatest right beneath the footing. Tabulated load values are for anchors installed in uncracked concrete. Estimate any other loads (e.g. Still a few smaller cracks under some heavy loading areas, but overall, very good results. It is estimated that a 50-story structure with 4-foot diameter columns using 4000 psi concrete can reduce column . How to Beam Load Calculation: 300 mm x 600 mm excluding slab. The ticket breaks down the weights of the amount of cement, stone, and sand used to make the 3500 psi concrete. Cement = 2810 pounds 2. Soil directly under the footing takes the greatest load, and therefore should be thoroughly compacted. 4000 PSI concreteis used forheavy traffic pavement, heavy use floor slabs like shops and warehouses, and concretefootings designed to support heavy loads. Not only has special concrete made such projects feasible due to load capacity, it has also allowed for the reduction of column and beam dimensions. In general, 3000 psi is usually used for concrete walls and footings and 3500 psi is used for flat work such as floors and walkways. the required square footing size and thickness. How much weight will a concrete slab support? The limiting factor would be the size of the footer and the bearing capacity of the soil, not the diameter of the pier. 89. d is the slab thickness, inches. 4.) BAretired (Structural) 6 Aug 15 04:36. THIS GIVES YOU A BASIC 4000 PSI CONCRETEMIX RATIOOF: 1 PART CEMENT. Civil Engineering questions and answers. 4. The actual number of anchors may vary due to jobsite installation procedures and waste. . Assume f's = 4,000 psi and steel bars G60. How big is the post? Using 6000 Safe working loads for single installation under static loading should not exceed 25% of the ultimate load capacity. Ec is the concrete elastic modulus, psi. Click to see full answer Accordingly, what is 4000 psi concrete used for? 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