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Showing results for tags 'Raft'.
Found 19 results
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Hi, First of all kudos to the administrators for taking the initiative of providing this platform. I am new here and i hope to contribute and gain maximum from this portal. I am designing a B+G+2 RCC Building with a foot print of 30x40(ft). Owing to the architectural requirements columns h...
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1) i want toAssign soil springs as i want to do the analysis in ETABS so what should be the value of Area springs for .6tone/sqft baring capacity ?? Raft Area = 120ft x 35 ft 2)There is always a Punching failure when columns are located along the edges of raft. Yet it's quite a common p...
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Dear all I want to discuss an issue recently encountered at site. Designer had given details of raft with #6 @ 6" o.c reinforcement BW in top and bottom meshes but contractor instead provided#4 @ 7" o.c. the raft and 1st story columns have been casted. On doing its capacity analysis the raft with pr...
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assalamualaikum sepakistan usersi wanna ask what are the considerations of using this ribraft foundation thing?what are the advantages and disadvantages?what are some load applied on it?how do we design the slab and the beam?thank you.
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Dear All, I have recently designed Raft foundation for 6 story building in SAFE. I have 4 feet offset area on site and have already spread the raft upto 4 feet offset edges. The SBC is 17000 lb per sq.ft. I created uplift load cases according ACI-318-08 as shown in the attached picture. After analys...
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Assalam-u-alikum for modeling raft foundation in etabs the supports for raft is point spring or area springs support?How i will assign value to a spring?
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Assalamu Aalikum, Hi, I am a new member. I have a plot measuring 30*70 feet. Most of houses being built here (in Rawalpindi) have masonry foundations (a pyramid of bricks on PCC or sometimes the PCC layer has three to four iron rods of size 3/8 or 4/8 in this "PCC" layer. I want to make a raft... -
Dear SE Pakistan Members, I am trying to model pits in Raft in CSi SAFE. PIT Bottom slab is depressed 2m below the Top of RAFT. I have following concerns which I would be glad if anyone can address. 1- What is the criteria/condition to analyze raft slab at one level (continuous) and pit/ raft on d...
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Salam Alaykom All, I am modeling a refugee camp on Etabs. I have over 20 buildings to be modeled, each 5 share the same raft foundation , and each raft foundation is no more than 3 meters away from the other. For simplicity I modeled all 20 buildings in the same Etabs Model to Calculate the for...
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I need help regarding MAT footing design in safe. Please read questions mentioned below and comment if any extra step or correction need to be done. This MAT footing is for 4 storey building in zone 2A and bearing capacity would be more than 1.25 ton/sft. 1) Does we need to increase the bearing...
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Dear members, As salamu alikum .To resist 700 kips total load in the column,if compressive strength of concrete 4 ksi,fy=60 ksi,to satisfy punching shear in raft,how much thickness is need?
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Aoa dear S.Es Wat is the criteria for selection of a particular type of a foundation especially with reference to an RCC building? e.g A RAFT or SINGLE FOOTING?
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AoA everyone ! I want to know that is there any minimum & maximum reinforcement ratios for section of Raft footing ? Any Code or Reference. Also if you can provide your steel quantity consumed to Rraft concrete quantity ratios. Regards
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salaam.. hope so all will be fine i m the civil structure engineer using etabs or sap for designing but i would like to prefer designing by hand calculations.. actually i need the hand calculation for mat or raft design if any one have the calculations regarding these please email or upload it.. i w...
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What could be the purpose of reducing raft stiffness by 60% (m11=m22=m12 modifiers of 0.4) in SAFE Model?
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DEARS; IS IT POSSIBLE THAT TWO ADJACENT RAFT FOUNDATIONS TO BE ON DEIFFERENT LEVELS AS 1 METER DIFFERENCE IN LEVEL??. I THINK NO... IF YOU ACCEPT WITH ME WHAT IS POSSIBLE SOLUTIONS? THANKS
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Salam there is a heavy raft of 6feet depth .Reinforcement is provided at top and bottom.is there any requirement of reinforcement in the middle of this T/B reinforcement for temperature/shrinkage control of this mass concrete.if there is any reference in any code kindly mention Regards
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I am designing a 2B+G+24 story building. I made the model in Etabs, and ran it, then exported the base reaction to safe for footing design. It has central core walls. When I ran safe (v8), the only version available with the office. It gave me a bearing pressure of about 14 ksf as opposed to allowab...
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- punching shear
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when we have raft foundation, is it necessary to draw it as we draw slab or just select all the joints at base level and turning them to fixed support will generate the effect of raft in analysis?
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- foundation
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