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Field Engineering Talks on FB and Others
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PostPosted: Sat Jun 12, 2021 1:22 am    Post subject: Field Engineering Building+General+Soil+Quality+Manholes+Light Poles+Fast Construction Reply with quote

12.06.2021-Civil Field Engineering + COVID-19 Engineers Role + Designs + Construction + Methods + Contracts + Organisations + Communication + Coordination + Quality AnnexSL + Why be behind Quality of Concrete Standard Material? Talk 387
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PostPosted: Sat Jun 12, 2021 9:33 am    Post subject: Field Engineering Building+General+Quality+HCS for Slabs Reply with quote

Check List for fast Track Construction
Simple sketch for a building



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Fast Track Construction
Simple sketch for a building

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PostPosted: Sat Jun 12, 2021 10:10 am    Post subject: Field Engineering Building+General+Quality+Wall Pour Reply with quote

Check List for RCC Walls Concrete Pour
Item # 11 previous (preparatory Works)/# 32 this (Concrete Pour)
1     Make sure that wall works have been approved for pouring.
2     Check whether or not, walls are to be poured by concrete pump or by crane, tower or else.
3     Since, walls are not many in any building, pour quantity may be limited.
4     Check that all temporary working platforms are safe, which may be installed from either side of walls.
5     Make sure that preparatory forms are cleaned properly, leaving no unrequired dust & dirt within.
6     Ensure that plenty of free access within wall forms is available to reach, either concrete bucket chute or pump boom down to level of first drop of concrete layer.
7     In certain cases of thin walls elements, reducer shall be attached to end of initial original pump boom.
8     Check all concrete pouring related inventories, as explained on other previous lists.
9     Make sure that watering is carried out in to wall works as well as, must ensure that all fixed supports are intact.
10     Make sure that attendance of steel fixer & carpenters for responding during whatever expected emergency, regarding reinforcing dislocation bars correction & controlling formwork sides opening or some other requirements.
11     Check that plumbs & wall line are in position to monitor setting out alignment, during pouring.
12     Receive concrete as usual having been permitted/checked through quality engineer for all site tests.
13     After approval, allow concrete to wall location.
14     Pour whole first layer in all walls & apply vibrator adequately, so that concrete reaches all corners & edges of first layer, so as to avoid formation of possible, either void or honeycombing or both.
15     Pour other layers as usual in pour sequence gradually.
16     It would take hours for pouring a single ordinary wall.
17     Reach concrete to top of concrete marked line & give required roughness or demanded finish.
18     Apply first instant curing on top by covering with polythene membrane or wet soaked or saturated hessian cloth.
19     Make sure that there develops no opening of forms or bulging during concrete & if so observed, try to reinstate back to true position, using, either props or other supports
20     Ensure that forms are not removed, prior to at least 48 hours post pour
21     Apply water on forms exterior & on top for curing purpose, after few hours of concrete is over.
22     Clear all debris from around wall areas of vicinity to keep involved area tidy.



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34-1-Facilities Sketches 1-18 -SK61b-WallForm.pdf
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Wall Form-Wall Pour

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PostPosted: Sat Jun 12, 2021 10:29 am    Post subject: Field Engineering Building+General+Quality+Check List Lift Well Walls Pour Reply with quote

Check List for RCC Lift Well Walls Concrete Pour [little complicated pour]
Item # 12 previous (preparatory Works)/# 33 this (Concrete Pour)
1     Prior to doing something on concrete pour activity, review calculations that were worked out to ensure that resisting forces provided by various components of supporting systems of formworks are at least twice than imposed forces / actions by concrete in full height pour & also, whatever force could be expected by working crew & vibrators etc. be containable
2     Make sure that wall preparatory works have been approved for pouring.
3     Check all working platforms on both sides of lift well internally & externally are safe, which may be installed from, either side of walls.
4     Make sure that access working platform is ready to safety engineer’s satisfaction, duly tagged at all risky droppable height areas.
5     Ensure that preparatory works have been approved & ITP signed off.
6     Make sure watering in to wall works as well as, all supports being intact.
7     Make sure attendance of steel fixer & carpenters for responding during emergency, regarding reinforcing dislocation bars correction & controlling formwork sides opening or some other requirement urgently.
8     Check that plumbs & wall line remain in position to monitor accuracy on setting out alignment, during ongoing concrete pouring activity
9     Make sure that all supports remain in place, all clamps & bolts being intact.
10     Make sure attendance of steel fixer & carpenters for responding during emergency of sides opening, steel reinforcing bars dislocation or to meet whatever other requirements.
11     Make sure that competent pouring gang is deployed for required duration.
12     Make sure that vibrators are available & all are in working order.
13     Make sure that standby vibrator too, works in accordance to requirement.
14     Make sure that all curing arrangements are intact for immediate post pour application.
15     Make sure that concrete pump & first transit truck mixer arrives, as advised to plant.
16     Make sure that additional reducing size outlet of boom is attached if so required, keeping in view/consideration, height of pour & size of column section.
17     Arrange quality requirement/control engineer for testing purpose.
18     Concrete has to be cleared for delivery to concrete pump, after initial site tests are completed satisfactorily.
19     Ensure weather & concrete temperatures, before allowing truck to deliver concrete to stationed pump.
20     Make sure that vibrator reaches to lowest layer of concrete.
21     Make sure that layers are not poured at onetime more than 400 mm deep.
22     Make sure that vibrator needle does not touch formwork.
23     Make sure vibrator needle does not touch reinforcing bars.
24     Explain to concrete supervisor that pouring has to be started in such a way, that corners are poured first to have concrete move in all directions, uniformly to certain extent.
25     Pour cannot be collected at any point within wall forms randomly, for it can cause pressure difference on form sides anywhere, leading to movement of form, which state shall cause major problems.
26     Lift well is a complicated pour, which requires uniformity on concrete pour to maintain concrete fluid pressure at constant level all around pour periphery.
27     Suggested that site engineer must take direct responsibility of such complicated pours, whether it be single lift well or lift banks wells
28     Make sure that concrete layers are formed around lift well forms & due care taken for door position formwork.
29     Pump boom has to keep on moving around preparatory works to allow uniform layer thickness pour.
30     All layers have to be vibrated thoroughly, gradually & concrete has to be kept on pouring till 1 m height/depth is poured around.
31     Make sure that at least half an hour gap is allowed to pour, so that poured concrete sets to certain extent, but does not form cold joints.
32     Pour other layers over previous until 2m height/depth is reached & then allow, say another half an hour for resting.
33     Continue whole height pouring, following specified sequences & start curing initially, as explained previously.
34     Make sure that top of poured concrete wall is roughened for making construction joint.
35     All walls outside forms have to be kept wet & top portion covered with polythene or wet soaked hessian.
36     Check external forms as well as, internal forms by strong hammer impact to find in case, some voids do exist, during application of vibrator.
37     Make sure that repetition of forms would not be required soon, which means that there would be no earliest requirement to strike forms in specified duration.
38     In case of such non early requirement of striking, do not allow removal of forms, after 48 hours, but keep curing intact from top as well as, from outside.
39     Allow removal of forms, when it is to be repeated for higher level.
40     During monitoring of forms, make sure that lines do not go out of tolerance limits & if so happens, try to reinstate by tightening supports.
41     After striking forms, make sure that defects are identified for raising non compliance report & recommendation of remedial actions obtained & applied to close NCR.



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34-1-Facilities Sketches 1-18 -SK64a-LiftForm.pdf
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Lift Form For Pour

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PostPosted: Sat Jun 12, 2021 12:10 pm    Post subject: Field Engineering Building+General+Quality+Staircase Concrete Pour Reply with quote

Check List for RCC Longitudinal Stair Concrete Pour
Item # 13 previous (preparatory Works)/# 34 this (Concrete Pour)
1     Check whether single flight or complete/full flights have to be poured.
2     Make sure that stair flight works have been approved for pouring.
3     Single flight pour requires one portion along with landing to be poured.
4     Make sure all supports are intact below forms.
5     Make sure that all reinforcing bars are intact & steps forms/risers are securely/correctly fixed & connected.
6     Make sure that all cleaning has been effected.
7     Make sure that inspection has been conducted & ITP signed off.
8     Make sure that side edge supports for waist & risers are well anchored.
9     In case complete/full stair flights have to be poured, make sure all supports & steps forms are intact & well anchored.
10     Make sure that all reinforcing bars remain in correct positions, while walking on steps risers’ forms, which should not twist in either direction.
11     Make sure that cleaning has been completed.
12     Make sure that pump or crane has been positioned at right location, so as to cover stair reach.
13     Quantity of concrete in stairs is not considerable high in volume, while it is slow in pouring as well.
14     Generally, upper flight is planned to be poured with upper floor slab.
15     Make sure that all concrete tools used in pouring are available in working order.
16     Make sure that curing arrangements are available on location.
17     Make sure that concrete is commenced with being poured from lowest step area & continued to ascend towards landing portion.
18     Vibrator is required to be applied at all steps locations.
19     Portion of waist slab & steps’ sections have to be cast monolithic & accordingly, vibrator is to be applied.
20     In case of single waist pour, a stop end has to be fixed at possible lower level of upper flight.
21     Landing has to be poured as small slab along with its downstand or upstand beam, as case may demand.
22     Finish on vibrated surface has to be applied in such a fashion that a rough surface is available to receive floor finishes.
23     Immediately, after pouring is over, curing has to commence with.
24     For case of complete pouring with slab, work of pouring has to continue, as explained.
25     Stair forms shall remain in position, until all forms of slabs are struck, with exception of vertical sides of waist slabs, which can be removed post concrete 24/48 hours.
26     Curing shall be considered an important activity, as it is difficult to stagnate or pound water on steps, respecting which saturated hessian shall be laid, covered over with polythene sheet.
27     Continuous water curing shall be required, even after spraying curing compound.



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suraj
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PostPosted: Sat Jun 12, 2021 10:41 pm    Post subject: Field Engineering Building+General+Soil+FIDICSilver-Quality Reply with quote

13.06.2021-Civil Field Engineering + COVID-19 Engineers Role + Designs + Construction + Methods + Contracts + Organisations + Communication + Coordination + Quality AnnexSL + Why be behind Quality of Concrete Standard Material? Talk 388
https://www.facebook.com/100000185425294/videos/4784927358190064
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suraj
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PostPosted: Sun Jun 13, 2021 1:21 am    Post subject: Field Engineering Building+General+Soil+Quality+FastTrack+Pouring Reply with quote

13.06.2021-Civil Field Engineering + COVID-19 Engineers Role + Designs + Construction + Methods + Contracts + Organisations + Communication + Coordination + Quality AnnexSL + Why be behind Quality of Concrete Standard Material? Talk 389
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PostPosted: Sun Jun 13, 2021 10:24 am    Post subject: Field Engineering Building+General+Soil+Quality+Suspended Slab Concrete Pour Reply with quote

Check List for RCC Suspended Slabs Concrete Pour
Item # 14 previous (Preparatory Works)/# 35 this (Concrete Pour)
1     Check that all preparatory works have been inspected in all respects.
2     Check that all temporary works have been inspected to meet safety requirements.
3     Check that supporting system of centering & shuttering has been inspected by probably third party, if so required within contract as well as, suggested for significant projects on a professional basis.
4     Third party herein means vendor that worked out designs for supporting system, based on its propriety materials & capacities of members of system to be devised that must suit in for specific scope of work in related pour.
5     All forces shall be worked out by vendor’s designer & be submitted for approval. After approvals of supporting system drawing, site provisions for supporting system be carried out
6     Check that batching plant has been ordered for supplying RMC.
7     Make sure that correct quantity of RMC is ordered tentatively subject to change.
8     Quantity of reinforcing bars is not excluded from calculations for purpose of ordering concrete, but virtually, reinforcing steel quantity has to be kept in view for deduction from concrete quantity to place order for major pours
9     Make sure that pour plan has been finalized, within method statement & plan details provided to RMC supplier.
10     Pour plan must give complete details of pour including quantity, time of pour start, frequency of each truck release from plant, slump, temperature, hours of pour, number of pumps, range of pump to cover whole pour, design mix reference if specifically applicable, circulation route on site for entries of equipment & exit, site testing from laboratory of batching plant, police permission, if required
11     Make sure that type of pumping equipment required is well known to RMC plant manager, while it is suggested that RMC plant manager better inspect site for assessment of specific pumping equipment requirement.
12     Make sure that all supervising personnel are available, when concrete is delivered.
13     Make sure that concrete crew/gang required strength for concreting is available on site.
14     Concrete timings should match those hours, when temperature of weather as well as, of concrete shall be within limits.
15     RMC should supply concrete having defined temperature, even if, ice addition may be required.
16     Concrete should be supplied with agreed frequency of transit truck mixers arrival.
17     A place should be selected for washing trucks, after empting, so that environment condition of site is not badly affected.
18     All equipment & tools to be used for concreting must be checked for their operations.
19     Dedicated Vibrators & standby vibrator must be checked to be in working order.
20     All curing arrangements should be made available on site to initiate timely curing.
21     For major slabs, construction joints must be prepared in advance & also, stop ends for whatever emergency should be prepared to avoid 11th hour fabrication rush, during odd hours.
22     Carpenters as well as, steel fixers must be available on & below slabs to monitor & meet certain emergency requirements.
23     Electricians should be available to check conduits displacements.
24     In case of additional disciplinary inserts, relevant technicians must also, be available to make good provided inserts, if so displaced during pouring.
25     Positioning of concrete pump/s locations should be clear of all obstructions.
26     Positioning of various concrete trucks should also, be made clear similarly.
27     Adequate electrical supply arrangements must be kept intact throughout pouring.
28     In case of adverse weather condition, it may also, be required to shade placing area, but it is not generally conducted as a common practice.
29     All onsite tests must be conducted, before receiving concrete trucks leave test location for reaching to join pump location for concrete delivery.
30     Quality engineer has to conduct all onsite tests & collect cube samples.
31     All substandard/defective concrete truck loads would be sent back after rejection, but it rarely happens.
32     Since, pouring slab is a fast activity, intense supervision & controls are required to be implemented in all respects.
33     Some sort of medical arrangement could be made to meet an/all accidental contingency.
34     Drinking waters or cold liquids for consumption must be made available on location for concrete crew/gang to drink to avoid both dehydration & sun stroke.
35     For food time or tea time, a few minutes break would require in sequence standby crew/gang replacement that must be made available on site.
36     For workers passive moments, replacement should be made available.
37     Beams have to be poured first, but not full depth.
38     Concrete should not be poured into beams directly, but received on slab edges to avoid impact on beams side forms, so as to avoid opening or dislocation of forms.
39     Concreting should start from one end & progress gradually, completing first stage beams pour.
40     Second stage of pour rotation should give concrete its level in right profile, including slab portion. If more than 2 or 3 pumps are being used, pour concreppedete on designated areas per plan & related areas must  be given individual attention, so that all pouring areas meet at one point as soon as possible, prior to formation of cold joints
41     Handling Unexpected Construction Joint-In case, due to certain emergency, construction joint is required, keep at certain on site agreed location on site formed stepped section form work at convenient location, where concrete has not reached & then complete pour up to that location, vibrate & then comply with necessary procedures to finish concrete for curing
42     Concrete pour cannot be commenced with at that joint for remaining portion, without complying with old & new concrete specification criteria.
43     Construction joint formwork shall be removed not before 48 hours, cleaned &  scabbled to remove all laitance, so as to expose all aggregate. All concrete debris, dust & dirt shall be cleaned. All reinforcing bars splashed by cement slurry shall be brushed to expose steel surfaces. Approval for pouring to be requested & after it is received, new pour shall commence to complete all left over areas.
44     Pour activity explanation continues-If temperature is high, immediate protection of surface has to be applied.
45     In case of two pumps or three pumps are installed, concrete can be started from as many locations as available number of pumps, but no cold joints can be allowed.
46     Concrete pour plan should provide all details & site supervisor must be handed & explained plan in details, so that reliable communication is made to all present on pour location.
47     Carpenters available must keep a watch from below slab forms that no support should yield or concrete come out from forms or if there is caused some other unknown problem, to handle that contingent situation.
48     Similarly, steel fixers have to check that no bars are dislocated & if so, immediate reinstatement of bar should be carried out.
49     In case of application is required by power float, it has to be made sure that concrete is hard enough, before applying power float.
50     In case, immediate cracks are seen, must be filled with cement & sand in form of grouting on wet concrete.
51     Post finishing, cover surface with polythene sheet or spray curing compound immediately.
52     Check that last truck does not reach immediately, after ‘last but one reaches’, but wait until all previous concrete is consumed.
53     Make sure that whole truck quantity shall be consumed.
54     In case, there is small quantity requirement, order that much quantity only, for last dispatch from RMC plant.
55     Procedural routine curing shall follow later on, as defined within method statement.
56     All rubbish should be removed from location & all concrete spillover upper reinforcing bars in columns should be cleaned.
57     Concrete shall be leveled to fixed top profile & ensure that level of poured concrete is achieved & does not go above fixed lines, which may require additional grinding.
58     Do not allow any worker or person to walk on finished surface, until concrete sets properly.
59     Keep all exposed projection bars well protected in wet humid condition, so that surfaces of these bars are not rusted. Rusting is a significant issue & therefore, it is of utmost importance to give good care to protection of all site installed of placed bars
60     Continue curing per agreed procedures, by laying on exposed or unformed surfaces saturated hessian cloth covered by polythene sheet & all time, water must be available to keep required temperature, which must be observed formally, particularly at hours, when high temperature is expected.
61     Also, keep formed surfaces at low temperature by spraying fog water instantly



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1-Method Statement Sketch61a-SlabSupport.pdf
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PostPosted: Sun Jun 13, 2021 10:38 am    Post subject: Field Engineering Building+General+Quality+Foundations Reply with quote

Check List for RCC Pedestal Footings Concrete Pour
Item # 15 previous (Preparatory Works)/# 36 this (Concrete Pour)
1     Used term pedestal for approximate cubical size of footing.
2     Ensure that adequate number of foundations have been approved for pouring.
3     Ensure that concreting arrangements have been agreed with RMC plant manager.
4     Ensure that acceptable temperature hours, which may be, either in early morning duration or within night duration.
5     Ensure that access to site for concrete truck & concrete pump is available.
6     Ensure that blockout pockets forms truncated/anchorage for anchor bolts are intact.
7     Ensure all anchor bolts templates are in right locations, when no blockouts are allowed.
8     Ensure that curing arrangement for immediate & post pour dealing.
9     Ensure that concrete top level marks are rightly fixed by surveyor & clearly, visible to responsible foreman/masons.
10     Quality engineer must be available for ensuring compliance with quality control procedures.
11     Low slump is expected for such footing concrete pours.
12     Get concrete truck loads delivery, following all defined procedures.
13     Do not pour concrete in onetime/one go, but restrict layer depth to 400 mm.
14     Cold joints have to be avoided during pouring.
15     Keep close eyes on sides of form & control in case, sides try to open to reset them.
16     Vibrator should be applied adequately, wherever concrete pouring is rotated.
17     After reaching top of concrete level immediately, cover with polythene sheet or spray curing compound, when finishing of surface of concrete is accomplished.
18     Keep side forms also, wet from external arrangements in hot hours.
19     Clear out all droppings out of concrete form surroundings as well as, from top.
20     Make sure that curing procedures are followed, as defined on method statements.
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PostPosted: Sun Jun 13, 2021 10:45 am    Post subject: Field Engineering Building+General+Soil+Quality+Foundations more than 400 mm thick Reply with quote

Check List for RCC Footings Blocks Concrete Pour Item # 16
Item # 16 previous (Preparatory Works)/#37 this (Concrete Pour)
1     For footings of long span steel frames.
2     In plan, it has rectangular shape with considerable depth of concrete block
3     Ensure that adequate number of foundations have been approved for pouring.
4     Ensure that right grade & type of mix is ordered since generally, these footings are thick members & need low shrinkage concrete.
5     Ensure that concreting arrangements have been agreed with RMC plant manager.
6     Ensure that acceptable temperature hours, which may be, either in early morning duration or within late night duration.
7     Ensure that access to site for concrete truck loads & concrete pump is available.
8     Ensure that blockout pockets forms/anchorage for anchor bolts are intact.
9     Ensure that all anchor bolts templates are placed at right locations, when no blockouts are allowed.
10     Ensure that curing arrangement for immediate & post pour dealing.
11     Ensure that concrete top level marks are rightly fixed by surveyor & clearly, visible to responsible foreman/masons.
12     Make sure that pourable foundation space is clean from all dirt, dust & debris.
13     Quality engineer must be available for ensuring quality control procedures.
14     Low slump is expected for such footing concrete.
15     Get RMC truck delivery following all QC procedures.
16     Do not pour footing concrete in onetime/one go, but restrict layer thickness to 400 mm, which means that few rotations shall be given to reach footing full pouring level mark indicated on top of forms.
17     Cold joints have to be avoided during pouring.
18     Keep eyes on sides of forms & control, in case sides tend to open during pour to reset.
19     Vibrator should be applied adequately, wherever concrete pouring is rotated.
20     After reaching top of concrete level & wooden float application, immediately, cover with polythene sheet or apply curing compound, when finishing of surface of concrete has been achieved.
21     Finishing of concrete should be done using demanded finish tool.
22     Keep side forms also, wet from external arrangements in hot hours.
23     Clear out all droppings out of concrete form surroundings, as well as from top.
24     Make sure that curing procedures are followed, as defined on method statements.
25     Must cure for required number of days
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