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Things Site Engineers Must Know

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Minimum thickness of slab is 125 mm.

Water absorption should not be more than 15 %.

Dimension tolerance for cubes + – 2 mm.

Compressive strength of Bricks is 3.5 N /mm2

Maximum Free fall of concrete allowed is 1.50 m.

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In soil filling as per IS code for every 100 sqm 3 sample for core cutting test should be taken.

Electrical conduits shall not run in column

Earth work excavation for basement above 3 m should be stepped form

Any back filling shall be compacted 95% of dry density at the optimum moisture content and in layers not more than 200mm for filling above structure and 300 mm for no structure

F soling is specified the soling stones shall be laid at 45° to 60° inclination (and not vertical) with interstices filled with sand or moorum.

A set of cube tests shall be carried out for each 30 cum of concrete / each levels of casting / each batch of cement.

Water cement ratio for different grades of concrete shall not exceed 0.45 for M20 and above and 0.50 For M10 / M15 contractor

For concrete grades M20 and above approved admixture shall be used as per mix design requirements.

Cement shall be stored in dry places on a raised platform about 200mm above floor level and 300mm away from walls. Bags to be stacked not more than 10 bags high in such a manner that it is adequately protected from moisture and contamination.

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Samples from fresh concrete shall be taken and at least a set of 6 cubes of 150mm shall be prepared and
cured. 3 Cubes each at 7 days and 28 days shall be tested for compressive strength. The test results
should be submitted to engineer for approval. If results are unsatisfactory necessary action/rectification/remedial measures has to be exercised.

Water used for both mixing and curing shall be clean and free from injurious amounts of oils, acids, alkalies, salts, sugar and organic materials or other substances that may be deleterious to concrete or steel. The ph shall be generally between 6 and 8.

Cement shall be tested for its setting.
1. The initial setting time shall not be less than 30 minutes.
2. The final setting time shall not be more than 10 hours.

Slump IS 456
Lightly reinforced 25 – 75 mm
Heavily reinforced 75 – 100 mm
Trench fill (insitu & Tremie) 100 – 150 mm (For Tremie no need of vibrator)

Curing Days Required
Super Sulphate cement : 7 days
Ordinary Portland cement OPC : 10 days
Minerals and Admixture added cement : 14 days

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Cube Samples
1 – 5 M3 : 1 No.
6 – 15 M3 : 2 No’s
16 – 30 M3 : 3 No’s
31 – 50 M3 : 4 No’s
Above 50 M3 : 4 + 1 No of addition sample for each 50 M3.

Things Site Engineers Must Know About Reinforcement and Steel Bars

Check out the Unit Weights and Conversion which will be required on construction site here

We at engineeringcivil.com are thankful to Er Vikrant for submitting this construction site check list which is of great use to all civil engineers.

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Comments
  • akhter hussain August 3, 2014 at 2:38 am

    this is very use full & help full for civil engineers. i realy like it..

  • mallikarjun October 28, 2014 at 1:36 am

    I like this

  • devaraj November 14, 2014 at 6:07 am

    this is very useful for every civil engineers

  • shahrukh khan November 16, 2014 at 1:43 pm

    Very. Useful enformation

  • Engr.Abdullah Tunio November 29, 2014 at 12:48 pm

    Very useful and informative knowledge.
    Thanks.

  • Krishna Raj December 15, 2014 at 8:47 am

    really very helpful, Thank you Sir/Mam. Try to give more important hints for us.

  • kavi January 6, 2015 at 11:07 pm

    This is very useful….thank you

  • Akbar February 5, 2015 at 3:17 am

    Thanks

  • prashanth March 5, 2015 at 6:33 am

    need to know more details thank you

  • sivasmart April 9, 2015 at 2:25 am

    we need to more details about site work” thank you.

  • MIRZA MUQEETH November 6, 2015 at 1:25 am

    deeply thanks, such a classified information relevant to civil
    appreciated

  • sakthi November 20, 2015 at 11:45 pm

    good useful knowledge

  • dksshahul November 25, 2015 at 1:46 pm

    we want more information from measurements

  • Chirag C Doshi December 5, 2015 at 11:59 am

    I want all detailed basic knowledge of civil engineering like cover
    – concrete grade for slab/column/beam/staircase/lift padadi & etc
    – open raft
    – open footing
    – lintle
    – reinforcement dia wise
    – why we use ring
    – what is lapping
    – why we use chair breaket
    – chajja
    – floting beam/column
    – basement
    – etc

    Pls let me know if you know anything of this….?

  • shuhaib kp June 14, 2016 at 10:25 am

    Very useful mam/sir thank u for your information

  • irshu June 25, 2016 at 3:27 am

    Excellent information appreciate civil..great thanks

  • govind kiroula July 27, 2016 at 5:51 am

    Thank u sir for ur useful information..

  • kavit August 8, 2016 at 3:38 am

    Its really a great information ……Sir need more information regarding the interview question for SSB tech..plse sir help…

  • prasanth(harsha) September 11, 2016 at 4:09 am

    Very useful information in above steps 🙂 🙂

  • BB September 16, 2016 at 4:24 am

    that was very helpful

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