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Recent content by JECCNC

  1. JECCNC

    Evaporation measurment

    I have no access to a standard pan, so I had one made of aluminum, i filled it with water, measured the depth and placed it inside the basin, so it is about what hokie66 suggested, do i still need to multiply by a coefficent, or does the fact that it is inside the test area give representative...
  2. JECCNC

    Evaporation measurment

    Hi Every one, First of all appologies if this is the wrong forum. But I have a large water basin 150 m x 50 M by 4 m deep made of concrete. This basin has to be tested for leaks and is filled with water. I am testing to BS 8009 which states that the max drop in waterlevel should be the lesseer...
  3. JECCNC

    Fire rating of large doors

    hey cdafd, thanks for your reply, to answer your questions: 1. doors are Swinging 2. the doors are for HVAC and Switchgear Rooms for an Electrical Substation 3.Manufacturer says he has the certification but only for doors less than 3m x 3m the doors on my project are 5m x 3.5m about 16.6ft...
  4. JECCNC

    Fire rating of large doors

    Hi all, on my project the specs call for all doors to be certified 2hr fire rated. on one of the substations the doors are 5meter by 3.5 meter. the contractor tells me that these doors are oversized and can not be certified as the code only certifies doors up to 3m by 3m , is this correct? and...
  5. JECCNC

    Pipe sleeves in concrete

    sorry about that, I am using british standards, but if there is any other details that may be considered " good practice" that will do
  6. JECCNC

    Pipe sleeves in concrete

    Hi everyone, I have a GRP pipe passing through a concrete chamber, the chamber contains an ultrasonic flow meter. for the interface between the pipe and the concrete wall of the chamber I am proposing that a pipe sleeve is cast in the chamber wall and the pipe is then passed through it. the EPC...
  7. JECCNC

    grout repairs to concrete

    Hi Guys, I have two questions regarding grout repair, pls refer to attached PDF file, 1. I have a steel plate anchored to a concrete floor, the plate supports a diagonal bracing member. during the floor concreting the contractor did not control the level and too much concrete was pored, to get...
  8. JECCNC

    \curing concrete with Curing compounds

    I have a contractor who wants to use curing compounds instead of water to cure concrete, I have not used these compounds before and know nothing about them, my qustion is: 1- do these compounds totaly replace water, or are they used togethr with water 2- are they applied for 7 days like water ...
  9. JECCNC

    grouting of re-bar

    I have a contractor who after casting a foundation realised that the starter bars for a column were mislocated , so the starter bars were cut and new bars were drilled and grouted in the correct location, since then this issue has been repeated frequently on other foundations and is becoming...
  10. JECCNC

    Testing of water retaining structures

    The tank i am testing is actually a basin for cooling water, the concrete is C 50 U ,cement content 425 kg/ m3 for underwater purpose , max crack width 0.2 mm , the thickness of the concrete is 500mm. the code i refer to are 1. bs 8007 2, contractor internal specs 3. local building code
  11. JECCNC

    Testing of water retaining structures

    I am on a project which uses an induced draft counter flow cooling tower, the system uses sea water and has a basin about 300 meters x 35 meters and 2.5 meter deep, there is also a pump basin which is about 7 meter deep. my question is regarding the testing of this basin for leaks. some codes...
  12. JECCNC

    Use of Treated sewage effluent ( TSE) for construction

    Ron & jrisebo Thanks for your observation about the double post , I must appologize. I assure you it was not intended that way. I was going through threads in " Structural forums" when I decided to post my query, right after that it occured to me I am probably in the wrong forum, sice my...
  13. JECCNC

    use of Treated sewage effluent for construction

    I have a situation where contractor is asking to use TSE water for compacting back fill material, the back fill is mainly sandy soil and is below a steel pipe rack. can any one help with the advantages and disadvantages of this action? are there any adverse effects of using TSE on soil
  14. JECCNC

    Use of post cast grouted anchors

    After concreting one of the combined foundations on site, a new rev of the drawing called for relocating one of the columns, the starter bars already cast are now out of place and new starter bars will have to be drilled and grouted into the already cast foundation, the rebar is 25mm and the...
  15. JECCNC

    Use of Treated sewage effluent ( TSE) for construction

    I have a situation where contractor is asking to use TSE water for compacting back fill material, the back fill is mainly sandy soil and is below a steel pipe rack. can any one help with the advantages and disadvantages of this action? are there any adverse effects of using TSE on soil
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