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  • Users: dr. rifat
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  1. dr. rifat

    Etabs Result interpret

    Dear all, Any one can explained me these results from Etabs 2016? How to interpret these results according to ACI-318? 1.Column P-M-M Interaction Ratios 2.(6/5) Beam/Column Capacity Ratios 3.Column/Beam Capacity Ratios 4.Joint Shear Capacity Ratios...
  2. dr. rifat

    Structural Stability Of Dam

    Hello, I am M.Tech students.My thesis is about "Reliability analysis of concrete dam by spreadsheet optimiztion(usning FORM)".I badly need some reference books or handouts abouts concrete dam.Please can anybody help me? Thanks in advanced. RIFAT
  3. dr. rifat

    Which Lapping Is Best And How?

    Hi, Please anyone can tell me which column lapping is best and how? Thanks in advanced. RIFAT
  4. dr. rifat

    Pile Design Help

    Hello Engineers, I am new i engineering profession.I have received a soil test report from a geotechnical investigation company.Here are the SPT values: depth(ft)---------------------SPT N 0---------------------0 5---------------------7 10---------------------9 15---------------------11...
  5. dr. rifat

    Rebar choice of concrete column and beam

    Hello engineers, Is there any problem if we choose larger bar diameter in beam and smaller bar diameter in column?Please experts ansewer with detail. RIFAT
  6. dr. rifat

    How to control concrete beam depth?

    Hi, We have to design a rcc frame structure.I have a query about this .We have to design a building which LL=80psf,slab thickness 6".A Beam tributary area is about 340 sft,beam size 12"x20".How to reduce the depth of this beam?If we design it as a t-beam is it sufficient? RIFAT
  7. dr. rifat

    Column Unfactored Load

    Hello, I have a query about foundation design. In building foundation design why we use unfactored column force,why not factored load? Thanks RIFAT
  8. dr. rifat

    Basement floor height

    Dear Engineers, I have a query.We have to construct a semi-basement with 10 storied building.My question is we decide that we have to limit basement height in 9',but if we increase its height then make it 10',then is there any chance of any design mistake?My senior tell me that if basement floor...
  9. dr. rifat

    About Reinforced Concrete Column Casting

    Hello, In rcc column casting how many times we can casting each column? Say can we casting a 12' column or 10' column in 3-4 times?Which precaution we may follow in this situation? if f'c=3 ksi ,fy=60 ksi Sorry for my bad english. RIFAT
  10. dr. rifat

    Please Help Me

    Hello Engineers, Please any one who expert in etabs please help me in this thread. http://www.eng-tips.com/viewthread.cfm?qid=417173 RIFAT
  11. dr. rifat

    Concrete Column Reinforcement Lapping

    Hello, In practical work we see that dovetail lapping is mostly used,but just now I found something different.Have a look in this image. Now why this engineer prohibit dovetail lapping in column?If we use lapping with dowel bar,how to joint dowel bar with main reinforcement? By Welding or by...
  12. dr. rifat

    Problem for changing beam alignment

    Hello, I am in confusion on changing beam alignment.Here are two beam alignment.Beam size and reinforcement are given also.But I want to know which is structurally safe or not and why.Please experts gives your best opinion.And the reinforcement and concrete section is sufficient? Information...
  13. dr. rifat

    Force generate surrounding soil during piling

    Hello engineers, I am trying to figure a problem out.Please give me a wise answer . In cast in situ concrete pile drilling,if the cutter(known as heavy drilling bit ) weight is 1000 kg,then if it fall from above 5',then how much force or how much vibration will generate in surrounding...
  14. dr. rifat

    Changing Column Size

    Dear engineer, I have a query about column design.We designed a 11 storied building.Which a column size is 12''x 36''.Which As=13.2 in²-3.05%. But my project engineer argue this size,he suggested me to keep column size 15''x 36'' for workmanship.Also from architectural point of view we have to...
  15. dr. rifat

    Piled Raft

    Hello Please excuse my ignorance on the subject. This is the first time I am designing piled rafts. I have a few questions for which I would appreciate some direction/references. 1.How to determine the thickness of piled raft?A expert give me this formula to determine thickness,But I cant...
  16. dr. rifat

    Fineness Modulus

    Dear Engineer, Why fine aggregates minimum fineness modulus is 0 or 2 and maximum is 5?? RIFAT
  17. dr. rifat

    About Column Least Dimension

    Hello Engineers, For G+10 storied concrete building is it correct to choose column least dimension 12 in?? Some expert says for 10+ storied rcc building it is best to choose column least dimension 15 in.But my structure says it is satisfied in 12 inch. N.B.=My column sizes are (12 in x 30...
  18. dr. rifat

    Design Piled Raft Foundation

    hello engineers, Please excuse my ignorance on the subject. This is the first time I am designing piled rafts. I have a few questions for which I would appreciate some direction/references. Soil safe bearing capacity(F.S.) 1.43 ksf for borehole 1 in 5' depth. Soil safe bearing capacity(F.S.)...
  19. dr. rifat

    If column are beneath basement wall (shear wall),there are any chance of future problem?

    Hello Engineers, I am uploaded two column layout,please leave a comment about marked column. Thanks in advanced. http://imgur.com/a/NGsmx RIFAT
  20. dr. rifat

    Help me to choose appropriate diameter of bars in column.

    Hello Engineer, Help me to choose an appropriate diameter of bars in column for a 10 story+1 basement concrete building.Which f'c is 3000 psi. I prefer this (http://imgur.com/a/5NsUE) ,whats your opinion?Is it OK?? Thanks in advanced all. RIFAT

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