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  1. Steel Inspector

    Canteliver deflection

    i have a cantilever slab that is 1 year old. its span is 2.2m. it has already shown a deflection of 7 cm. when does deflection become too dangerous? and a sign of failure?
  2. Steel Inspector

    Does SRC concrete reach design strength in 28 days?

    SRC concrete (Sulfate resistant concrete ) is mixed using type 5 cement ( High sulfate resistant cement) Now, type 5 cement reacts slower than type 1. because of the lower C3A content. Doesn't that mean that SRC concrete will take longer time to reach the strength that OPC concrete will reach in...
  3. Steel Inspector

    use of rust remover on Rebars

    Hello, i noticed that some people use a chemical rust remover on Rebars. is that Allowed? it leaves a white phosphate coating on the rebar! and that coat sometimes get to Concrete in the construction joint! i noticed that ACI didn't explicitly addressed this work practice. any thoughts?
  4. Steel Inspector

    PCC under footings

    Here were I work, We are used to pouring a 10 cm plain concrete layer below footings. It's also required to be 10 cm wider in every direction. We do it under isolated footings, strip footings... almost under all types of footings. Is it required by ACI? and what is it's role? Thank you
  5. Steel Inspector

    Concrete Fogging

    hello everyone, I need your help regarding concrete fogging if i have a slab of 400 m2, and i want to use fogging as a curing method, what tools do i need? kindly i need details. i am new to this. and i looked in the local market for a solution but i could not find. i saw this picture in ACI...
  6. Steel Inspector

    Openings in a DOME

    Hello, I have a RC dome that have around 36 openings. these openings are located at three levels, 12 openings at each level. my concern is that these openings will cut some of the reinforcement steel. it will cut one-third of the reinforcement at the first level ( closest to support ), and...
  7. Steel Inspector

    Canteliver bars development length

    hello, is there in ACI code a development length formula that is specific for calculating bar development length in canteliver beams? or is it just one global formula that is used for calculating bar development length in all members, simply supported beams.. cantelivers ... etc. the reason...
  8. Steel Inspector

    steel plate emdeded in reinforced concrete

    hello, it is well known that if two metals are embedded in concrete, they trigger corrosion.( disimilar metal corrosion ). https://www.cement.org/learn/concrete-technology/durability/corrosion-of-embedded-materials then how is it possible to weld steel plate to rebars in concrete without...
  9. Steel Inspector

    concrete cover

    hello ACI 318 specifies minimum concrete cover, is it possible that we might encounter certain instances where a corrosive atmosphere or a severe exposure requires a concrete cover higher than that specified in the code? also is there anything regarding using different concrete covers for the...
  10. Steel Inspector

    2d bent beam analysis

    hello is there a beam analysis software i can use to calculate bending and shear diagrams on a 2-d bent beam?
  11. Steel Inspector

    concrete sampling

    Hello If i have a slab concrete pouring, say a total amount of 150 cubic meters. concrete will be delivered to site through trucks, each of a capacity ranging from 6 - 8 m3 on average. which means that around 20 trucks will come. my question is, on what basis should depend when choosing cars...
  12. Steel Inspector

    hello i am asking about supporting

    hello i am asking about supporting L shaper column on a circle column. how much of support area is enough? should L shaped column center of gravity match the circle column Center of gravity. thank...
  13. Steel Inspector

    placement of Flat slab extra negative moment over column

    Hello, in beams, extra negative reinforcement at columns would be placed under the main upper reinforcement of the beam. in flat slabs however, the general practice ( at least in this part of the world ), is to place the extra negative reinforcement at columns over the slab top mesh. what...

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