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Field Engineering Talks on FB and Others
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suraj
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PostPosted: Thu Jun 10, 2021 1:32 am    Post subject: Field Engineering Building+General+Soil+FIDICSilver-Quality+Light Poles Foundation Reply with quote

Check List for Light Pole Foundation works Item # 28
Light poles are required at sides of streets, roadways, as well as in sports stadiums
Work requires to be done at proposed locations, after pre-casting finishes at factory yard
Therefore, this item has to be produced in following major activity instances
1     At pre-casting yard for purpose of its required RC work
Activities involved are
a     fabrication of reinforcing bars,
b     fabrication of formworks & necessary supports,
c     placing PVC electrical duct inserts in form of long bend,
d     loading & offloading steel inserts,
e     fixing anchor bolts plate,
f     fixing concrete spacers/covers pouring to required levels, curing,
g     striking forms, clearing & transportation, after curing completes

At site location
1     Setting out coordinates,
2     Excavation of foundation pit,
3     Preparation & laying blinding concrete
4     Application of water proofing or concrete soil protection & its protection, if required

Transportation
1     Transportation to be conducted employing required suitable IHP trailer
2     Transportation to site location, offloading & placing at site prepared location at formation

At site location
1     Application of vertical soil protection or waterproofing & required protection, if required
2     Approval of installation by competent authority
3     Backfilling in layers to required levels
4     Making good surrounding areas, affected by all these activities
5     Erection of lights pole
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PostPosted: Thu Jun 10, 2021 11:06 am    Post subject: Field Engineering Building+General+Soil+Quality+Check List for Precast RCC Manholes works Item # 29 Reply with quote

Check List for Precast RCC Manholes works Item # 29
1     On major project plants, pertinent utilities services all over such plant, in particular on external areas, various services lines are laid, which convey sewage, storm water, oily sewage, acid water etc. all such services are very complicated & are therefore, very well coordinated, by engineering unit on site.
2     Hundreds of such manholes are required to be constructed on such project site & of course, all coordinates & Invert levels of such manhole units are not same, but each unit has separate designations for whatever information required for construction.
3     All manhole units are required to be studied from having clear viewpoint of all connection in & out on every unit.
4     There would be many engineering clashes on various units, which must all be resolved, prior to its work is started or else, unit work shall be erroneous.
5     Many times, input is provided by site engineering personnel, regarding certain clashes meeting at site, which make work impossible, even if, precast unit has been produced, which error state must be corrected, prior to finalizing that unit.
6     I had been fortunate in this regard, when I was in-charge of all engineering coordination on one such mega project, whereat, I worked on more than 400 such units from conception to end, based on standard design information, provided on contract.
7     I did not agree on what other expert sought, but I took complete design & engineering responsibility on to self & worked out all working design drawings for pre-casting purpose respecting each manhole unit.
8     It was my added responsibility, which I enjoyed & delivered all such drawings for approvals & then produced as built drawings. Result was that such details resulted in a thick book containing drawings.

Requirements for such voluminous work
1     Preparation of one considerable size casting yard, equipped with all such facilities, meant for formwork production, fabrication of reinforcing steel bars, supporting all formworks & concrete pouring & curing arrangement in addition to facility area for loading precast units on to trailer for transportation to site locations
2     Studying all drawings, related to each manhole unit from various interconnecting drawings, ensuring size of unit & final applicable coordinates
3     All clashes coming on way to such unit from various other units must be resolved & if final approval is required, must be obtained formally in terms of clarification or making some other proposals per site conditions
4     Sketches required are as follows for each unit
5     Plan drawing showing all incoming & outgoing pipes
6     Position of manhole cover
7     Elevations of all four sides internally in directions North, South, East & West
8     If no pipe is indicated on either wall, must be left blank
9     Square blockouts openings to be indicated on all such elevations, or otherwise complying with minimum requirement, for example, vertical distance of block out from invert level
10     These openings would be grouted on site, once manhole unit is installed & pipes connected
11     All such drawings with all confirmed working sections & plans for each unit are issued to site engineer for working on precasting
12     Precasting of each unit base slab & four walls shall be done monolithically, in case no inconvenience exists
13     During casting, some pauses may be applicable, to an extent cold joints are avoided
14     Base & walls monolithic casting of utmost significance, because all blockouts are located within walls, which condition requires that all spaces within formwork must be concreted, without causing any void or honey combing
15     Manhole cover slab is worked separately & covers are also, worked upon separately
16     Wherever depending on depth, cat steps are required to be fixed in, could be fixed later by chemical anchoring / drilling & grouting application
17     Site shall be made ready to receive & install such unit at every location of respective unit
18     Excavation shall be completed to specified level
19     Compaction shall be completed to produce a good even formation
20     Blinding shall be laid to specification requirement
21     Concrete protection shall be applied, per design details & its protection layer produced
22     Marking shall be done to receive precast unit
23     Once unit is completed & ready for transport to site location, after when all related activities are over & period of 28 days completed, depending on site requirements, precast unit transported, using trailer means & offloaded on to site location
24     Once received & downloaded to exact marked location & placed on to required levels, permanent position shall be achieved, so that unit remains stable, without caused with or by any disturbance
25     All incoming & outgoing pipes shall be positioned according to designs & details, followed by making arrangements for grouting to a standard that makes blockouts completely filled & remains watertight
26     All areas shall be cleaned & all pipes covered, once grouting is over & water tightness test conducted. If required, repair shall be applied to leaking locations
27     External concrete protection & its further protection cover shall be carried out
28     Once approved all foregoing activities, backfill activities shall be carried out in layer
29     Cat steps, if detailed, shall be drilled & chemically grouted
30     If detailed out, benching could also, be carried out
31     Manhole top slab work shall be carried out per details
32     Precast manhole cover shall be placed on its designed opening
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suraj
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PostPosted: Thu Jun 10, 2021 11:09 am    Post subject: Field Engineering Building+General+Soil+Quality+Check List for Precast RCC Manholes works Item # 29 Reply with quote

Check List for Precast RCC Manholes works Item # 29
1     On major project plants, pertinent utilities services all over such plant, in particular on external areas, various services lines are laid, which convey sewage, storm water, oily sewage, acid water etc. all such services are very complicated & are therefore, very well coordinated, by engineering unit on site.
Sketches typical for indicative refernce



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Sketch 33

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Sketch 32

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PostPosted: Thu Jun 10, 2021 11:12 am    Post subject: Field Engineering Building+General+Soil+Quality+Check List for Light Pole Foundation works Item # 28 Reply with quote

Check List for Light Pole Foundation works Item # 28
Light poles are required at sides of streets, roadways, as well as in sports stadiums
Work requires to be done at proposed locations, after pre-casting finishes at factory yard
Therefore, this item has to be produced in following major activity instances
Sketch 8 indicate



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1-Method Statement Sketch8-LightPoleFound.pdf
 Description:
Sketch 8 Light Pole Foundation Indicative

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PostPosted: Thu Jun 10, 2021 11:16 am    Post subject: Field Engineering Building+General+Soil+Quality+Check List for Foundation/Footings Concrete Pour Reply with quote

Concrete Pours
Check List for Foundation/Footings Concrete Pour
Item # 6 previous (preparatory Works)/# 28 this (Concrete Pour)
1     Plan adequate number of as many foundations, as practically feasible for pouring concrete onetime, meeting site schedule, depending of ease of RMC delivery possibility & job requirement.
2     Book concrete in advance to facilitate RMC supplier, chart out RMC plans schedule. Commercial batching plans often, remain occupied with orders, when projects run at peak & of course, temperature consideration & working hours rule over deliveries
3     Book concrete pump of required boom length, so that all concrete scope areas are covered, by mobile pump.
4     Have RMC representative visit site pour location for better assessment of timings & access & circulation to pour location.
5     Footings pouring being fast activity, which point has to be considered in considering frequency of arriving transit mixers.
6     Prepare pouring adequately strong temporary working platforms, wherever required.
7     Ensure concrete pouring inspection is over & ITP is signed off.
8     Concrete temperature should not exceed 32 deg C normally
9     In hot weather condition, plan for concrete pouring, either in early morning hours or late evening or at night hours.
10     Keep in mind that residents if located in or around site, may be affected adversely, by concrete pour at sleeping hours, which point may require police prsmission
11     Make sure that whatever installed or erected supporting arrangements should not disturb during pour.
12     Make sure that vibrator & standby vibrators are available.
13     Make sure that masons tools are available.
14     Make sure adequate number of carpenters & steel fixers are in attendance for meeting certain low profile emergency activity.
15     Make sure all arrangements whatsoever including curing compound, regarding curing activity are available.
16     Make sure that concrete testing equipments are available, either directly or by laboratory personnel presence.
17     Make sure that these equipment include wheel barrow, slump cone, compacting rod, cube moulds, thermometers, air voids measuring instrument all to specifications requirements,
18     Make sure that a qualified technician is available to test & record all observations.
19     Make sure that RMC dispatch from batching plant & delivery timings to site are correctly recorded.
20     Make sure that no RMC truck starts pouring delivery to pump or to crane located at site, without obtaining verbal clearance from testing location.
21     Make sure that trained group or crew to receive pumped concrete is available at site location of concrete.
22     Prior to commence with pouring, have all vibrators checked for operations.
23     Make sure that location is cleaned well, prior to pouring commences with.
24     Check that concrete location is watered well to avoid flash setting & all water must drain out, before commencement of pour.
25     Receive RMC truck after testing clearance & start pouring from pump station.
26     Footings can be poured in one go, should depth not exceed 400 to 450 mm.
27     Footings can be poured continuously, in case beams are cast monolithic.
28     Footings can be poured one after another, in case beams are to be cast separately later
29     Make sure that no starter bars are displaced during pouring.
30     Make sure that concrete occupies all spaces around reinforcing bars & forms.
31     Immediately, after top of concrete is leveled, wood finished floated & say half an hour is over, curing compound could be sprayed, depending on site situation/& weather temperature & wind breeze.
32     No gap should be allowed, during pouring for achieving a better pour quality.
33     It is a common practice not to order last truck, since exact quantity of mix is not known.
34     Therefore, hold last truck to replace its order, after major pour is over.
35     Make sure that construction joint at footing stub column junction is correctly formed by either roughening or scabbling.
36     Testing technician must collect cube samples & record all testing observations.
37     Apply hessian or gunny rolls & polythene sheets over unformed surfaces & cure with water all times for at least 7 to 14 days, depending on weather temperature & type of Cementing Materials.
38     Make sure that curing arrangement is not thrown away by fast winds.
39     Hardened concrete should not be allowed to dry any time till curing is over.
40     Side forms can be removed after 24 hours to 36 hours.
41     Remove all splashes from vertical reinforcing steels, if these bars have not been protected by polythene sheet. All vertical bars must remain in design position intact



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Foundation Pour Sketch for formwork
Sketch 42

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suraj
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PostPosted: Fri Jun 11, 2021 1:21 am    Post subject: Field Engineering Building+General+Soil+Quality+11.06.2021-Civil Field Engineering + COVID-19 Engineers Role + Designs + Reply with quote

11.06.2021-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 386
https://www.facebook.com/100000185425294/videos/4779140138768786
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PostPosted: Fri Jun 11, 2021 10:38 am    Post subject: Field Engineering Building+General+Quality+Check List for Stub Columns Concrete Pour. Item # 7 previous (preparatory Wo Reply with quote

Check List for Stub Columns Concrete Pour.
Item # 7 previous (preparatory Works)/# 29 this (Concrete Pour)
1     Plan adequate number of as many stub columns, as practically feasible for pouring concrete onetime, meeting site schedule, depending of ease of RMC delivery possibility & job requirement.
2     Book concrete in advance to facilitate RMC supplier, chart out RMC plans schedule. Commercial batching plans, often remain occupied with orders, when projects run at peak & of course, temperature consideration & working hours rule over deliveries
3     Book concrete pump of required boom length, so that all concrete scope areas are covered, by mobile pump, if mobile pump is available, or else use mobile crane or tower crane, using concrete skips with extended hose pipe chute
4     Factually, it would be inconvenient for RMC supply to deliver too small quantity.
5     Book concrete pump of required boom length in case, stubs pour is required by pump, but stubs columns may also, be done using ordinary crane pour.
6     Check that stubs are not more than 2 M high in general.
7     Check that site provided means are feasible for pouring RMC.
8     Check if site pour means are utilized, concrete supply should not be delayed excessively, during pouring, so as to avoid cold joint formations.
9     Check that all stubs planned for pouring are safely accessible for pour crew/gang.
10     Make sure masons tools are available for leveling concrete pour terminating surface joints.
11     Make sure adequate number of carpenters & steel fixers are in attendance for meeting certain low profile emergency, though such miss-happenings would be rare.
12     In case of concrete pump being used, make sure that only, required quantity of mix is poured into stub to prevent concrete from dropping around stub preparatory works.
13     Ensure vibrator is applied properly into stub portion, without touching reinforcing bars or forms.
14     In case, vibrator touches forms, probable accidental chances of form opening are not acceptable.
15     Check all curing materials required for stubs are available on site, including curing compound, which could be used to be sprayed post striking forms, when due within 24 to 48 hours.
16     While concrete truck arrives, collect sample for slump, air voids etc.
17     Check loading & delivery times & also, check RMC dockets.
18     Allow truck to move in to location station for delivery.
19     Check site prepared open chutes are available in case of concrete without pump, so that concrete can be easily transported to stubs locations.
20     In certain cases, steel wheel barrows can also, be used for transporting concrete from truck chute location, moving over accessible working temporary paths to stub location.
21     Small buckets can also, be used for collection of concrete & pouring into stubs.
22     Mobile or tower crane can also, be used for pouring stubs, if available.
23     Make sure that stub is concreted in layers not exceeding 400 to 500 mm deep.
24     Make sure that vibrator is efficiently used, after layer pouring.
25     Make sure that after pouring stubs to their marked top level, top is covered with polythene or hessian, as convenient.
26     Make sure that no supports are slackened, during pouring.
27     While using pour without pump, there are remote chances of forms opening, but with pump pour chances of forms openings are frequent.
28     Make sure that foreman or chargehand type supervisors do not allow water to be added to concrete, during pouring.
29     It often happens that during long pour, while concrete truck getting delayed, concrete stuff is stiffened, causing hardship to workers.
30     To avoid that stiff state of concrete mix, they tend to add water to mix, which is not acceptable in any case.
31     Start curing after few hours, depending on temperature variations, but sides of forms, externally, can be kept cold by spraying water.
32     Side forms can be removed after 24 hours to 36 hours, but it takes considerable time, while opening forms, due to many reasons.
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PostPosted: Fri Jun 11, 2021 10:39 am    Post subject: Field Engineering Building+General+Quality+Check List for grade slab (floating slab @ plinth level) Concrete Pour. Item Reply with quote

Check List for grade slab (floating slab @ plinth level) Concrete Pour.
Item # 9 previous (preparatory Works)/# 30 this (Concrete Pour)
1     Ensure that preparatory works have been approved & ITP signed off.
2     Plan for onetime/one go pouring operation.
3     Ensure that RMC delivery order is in place.
4     Ensure that RMC manager is instructed, about grade slab pour being fast/frequent delivery.
5     Ensure what type of concrete pump is required to cover whole pour scope area.
6     Make sure that a single pump is adequate or there may be required more than one concrete pump.
7     Have batching plant manager inspect site for assessment.
8     Decide frequency of supplies & pouring hours.
9     Decide workforce requirement strength for pouring period.
10     Make sure all other concrete pour support requirements are available.
11     Make sure that access to concrete pump & trucks is clear.
12     QR/QC engineer is required to care about testing of concrete.
13     Preferably, pour hours should match concrete temperature extremes/variations.
14     In case, pour duration is long hours, rest pause to workers may be required, which necessitates standby teams.
15     Safety arrangements are to be looked into as well, which safety engineer should care about.
16     Check in case trucks have to arrive at a frequent interval of 10 to 15 minutes, while one truck carries say 8 to 10 cum concrete.
17     Workforce shall be required accordingly, to avoid receiving delivery & placement.
18     Surface finish shall also, be required, depending on required class of surface finish.
19     Check whether or not, power float application is demanded for thin tiling works.
20     In case, it is required, further post pour long hours shall be required for operating power float.
21     Have pour started & implement all checks.
22     Curing should be commenced with immediately, after area is ready for that.
23     Curing compound should be sprayed immediately, after or even during pouring is in progress in case of unpleasant/adverse weather temperatures.
24     Cover surface with polythene sheet over curing compound temporarily.
25     After many hours, remove polythene sheet & cover with hessian cloth, watered & recovered with polythene sheet.
26     Process of curing to continue for specified number of days.
27     Make sure that set concrete surface is ready to be applied with power float or demanded manual wooden finish, whatever could be a case.
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PostPosted: Fri Jun 11, 2021 10:41 am    Post subject: Field Engineering Building+General+Quality+Check List for RCC Columns Concrete Pour Item # 10 previous (preparatory Wor Reply with quote

Check List for RCC Columns Concrete Pour
Item # 10 previous (preparatory Works)/# 31 this (Concrete Pour)
1     Ensure that adequate number of columns to be poured one time, are ready for pouring
2     Make sure that all columns preparatory works are clear of all dust & dirt by compressed air application & well watered, immediately before concreting.
3     All loose nails, loose binding wires etc. whatever else, unwanted item should be removed
4     Quantity of RMC should be enough for placing an order, though tentative booking might have been done in past, but confirmation is to be made now.
5     Suitable boom length of concrete pump to conveniently reach to all columns locations must be ordered.
6     Ensure that preparatory works of all proposed columns have been approved & ITP signed off.
7     Make sure that temporary access working platforms, one  & if required more than one is/are erected meeting safety requirements/satisfaction, duly tagged at all risky droppable height areas. Keep in mind that no one is allowed to accede to steps & platforms, until, arrangement is permitted to be used by permissible/ authentic safety tag
8     Make sure that all columns forms supports are in place, all clamps & bolts are intact.
9     Make sure attendance of steel fixer & carpenters for responding, during emergency regarding reinforcing dislocation bars correction & controlling formwork sides opening or some other requirement respectively & urgently.
10     Make sure competent competent/trained pouring gang/crew is deployed for required duration.
11     Make sure that nozzle vibrators are available & should be in working order.
12     Make sure that standby vibrator too, works in accordance to requirement.
13     Make sure that all curing arrangements are intact for immediate post pour application.
14     Make sure that concrete pump & first transit truck mixer arrives, as advised to plant.
15     Make sure that additional reducing size outlet of pump boom at pipe chute is attached if so required, keeping in view height of concrete pouring & size of column section.
16     Arrange quality requirement/control engineer for testing purpose.
17     Concrete has to be cleared, after initial site tests are completed.
18     Ensure that weather & concrete temperatures are within acceptable range, before allowing concrete transit truck deliver concrete to stationed pump.
19     Make sure that vibrator nozzle reaches successfully to lowest layer of concrete.
20     Make sure that layers are not poured at onetime more than 400 mm deep.
21     Make sure that vibrator needle does not touch formwork.
22     Make sure that vibrator needle does not touch reinforcing bars.
23     Make sure that all columns are poured one after another, only in layer & no other way. Do not allow full height pour or even half height pour continuously
24     It is advised that in no case, onetime height should exceed one meter for preventing form sides bulging.
25     Possibility is that concrete shall fall out of column forms & must be removed immediately, from ground.
26     Hammers can be used to tap forms from exterior surfaces to ensure that all areas of forms have received concrete to avoid voids.
27     Concrete pour gang should be kept on rotating from one location of column to other location.
28     After completion of all pours, site should be cleared of all debris & wet hessian should be kept on top of columns.
29     Form sides in case of high temperatures, should be kept wet by spraying water on exterior surfaces.
30     Forms should not be removed from columns, before post concrete pour 24 to 36 hours, depending on weather temperature.
31     If there is no requirement of formwork for immediate reuse, formwork striking may be delayed, which state requires, keeping exterior surfaces wet with water spraying.
32     Immediately, after striking forms, urgent inspection has to be done for identification of defects & for resorting to non compliance reporting as well as, obtaining recommendation of remedial actions, if so required. No meaning to hide defects. Hiding defects means inviting future structural problems, which shall be too expensive to be digested by owner
33     Curing has to be effectively continued, first by applying curing compound on wet RCC surface using, either water based compound or wax based compound, as approved on project.
34     Complete duration of curing has to be complied with, without allowing any of either certain slackening or compromise.
35     Water curing can also, be applied on columns, which shall certainly be more effective & in fact, cent percent effective, if carried out intensively, though quantity of water consumed shall be considerable.
36     Curing compound based curing is effective only, between 50 to 70 % depending on type of curing compound used. If used wax based curing compound, curing is more effective than water based curing compound, but additionally degrading or debonding agent is required, when plaster or render is to be applied within six months of pouring, while in case of water based curing compound, only 60% effect can be achieved.
37     Best solution is carry out curing using water on hessian covered with polythene membrane all time during curing duration, whereas, immediate crack prevention curing must be applied, immediately after surface is ready to receive water based curing compound.
38     Surface must be sprinkled with water first intensively & then immediately apply curing  compound on that, because purpose of curing compound is to retain sprinkled water under curing compound membrane & not to cure directly by its effect
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PostPosted: Fri Jun 11, 2021 10:50 am    Post subject: Field Engineering Building+General+Quality+Check List for Fast Track Building Construction with RCC Cast In Situ Foundat Reply with quote

Check List for Fast Track Building Construction with RCC Cast In Situ Foundations, RCC Cast In Situ Columns & RCC Cast In Situ Beams with Pre Cast Pre Stressed Hollow Concrete Slab Units/ HCS Units Item # 29

https://www.abudhabiprecast.com/products/hollow-core-slabs/
HCS Units-Definition & Merits
1     Hollow-core is a pre-stressed concrete slab manufactured with continuous voids to reduce weight and cost. It is primarily used as a floor and roof deck system.
2     Hollow core flooring systems provide safe, solid and secure flooring for your needs.
3     This unique product is both strong and durable allowing for increased floor load capacity and enables high spans with lower thicknesses, thereby substantially increasing clear heights of rooms.
4     Hollow core slabs are naturally fire resistant, offering 2+ hour fire ratings with no additional fireproofing needed, resulting in lower construction and insurance costs.
5     They are sound resistant, providing STC ratings of 50 or more.
6     Being very economical and providing unlimited design flexibility,  makes it possible for Hollow core to work with unusual building shapes and cantilevers.
7     Hollow core plank is compatible with steel, wood, masonry and other precast products.
8     Hollow core is manufactured indoors, while the site is being prepared, installation begins, as soon as site is ready.
9     Hollow core can be erected in very high quantities, due to its ease of handling allowing for an extremely fast floor system.

Preface
1     Though, it is not new method of designs & construction, yet it must be given a relook.
2     Indeed such methods of constructions are applied on to fast track construction, where simple activities elements such as foundation, beams & columns are constructed using conventional cast in situ technology, whereas, time consuming, major component such as suspended slabs are avoided to be delivered by cast in situ methods
3     Advantage to use this execution method is that site remains adequately tidy & all problems of erection of slabs supporting safe supporting system for weeks, being eliminated, due to fact that HCS units act as permanent forms for slabs
4     Only elements like columns & suspended beams are cast on site
5     Beam soffits supports forms shall be allowed to stay for defined requirement only
6     Components are defined as follows:
a     Foundations per designs, All works up to basement of plinth or grade level
b     Stub columns & retaining walls
c     Or else, beams framing, if so designed
d     Columns in each floor Cast in Situ
e     Beams at every floor level Cast in Situ
f     Hollow Core Slabs placed on beams
g     Construction of diaphragm slab on Hollow Core Slab
h     Treatment of peripheral structural trimming

This execution method comprises of following components:
1     Complete surveying whole plot or land & setting out all sides coordinates & vertical controls run from formal GPS
2     Arrangement of dewatering, in case such activity is included per soil investigation report
3     Excavation of relevant areas of foundation, per design details & ensuring soil capacity, if no piling is required
4     In case, piling is required, carrying out piling component
5     If raft or mat is in designs, working out that activity
6     Generally, for multistory structures, in strong soils, raft foundation may do, or beam framing may be conducted, if soil is too strong
7     All activities of foundations, such as soil improvement if so required, blinding, concrete protection to foundation surfaces in contact with soil, retaining walls & all other elements or components up to grade slab or basement slab level are completed, including all horizontal & vertical waterproofing & backfills in layered sequence
8     In parallel, in factory or yard well suited for precasting of hollow core slab units HCS, all activities related to designed HCS productions must be ongoing in line to site schedule
9     All scaffolding activities & working platforms shall be taken up for safe working conditions
10     On site work of RCC Columns must go on for whole floor in one storey in compliance to various quality checks included on past statements
11     On site work of RCC Beams must go on for whole floor in one storey in compliance to various quality checks included on past statements
12     Designs of RCC beams must meet requirements, as required by precast details
13     Purpose of these Columns & Beams being that HCS shall directly rest on these beams, which are laid to meet HCS requirements
14     Curing & all other repairs must be complied with other statements description, if necessary
15     Approvals of all cast in situ activities for furthering placing HCS units
16     Approvals of HCS units in factory or yard for furthering transportation
17     Steam curing shall be permissible for production of HCS to save time. This system of curing is also, called autoclaving
18     Transportation of HCS units to site along with all loading & offloading arrangements
19     Capacity of hoisting unit must be ascertained to suit working requirement, which may vary for each & every HCS unit, covering all areas under construction
20     If tower crane of reliable tip capacity is available, may be used keeping in view safety requirements
21     High capacity mobile crane to cover complete horizontal & vertical of range of all HCS units would be required for raising & placing each & every unit
22     All bearings of RCC beams shall be cleaned, prepared & if required, ground for leveling purpose to suit bearing & HCS grip
23     One intermediate beams shall carry two HCS for interlocking purpose
24     It may be further better if two way HCS be installed, depending on designs
25     All end trimming effects shall be prepared, per structural designs to ascertain that diaphragm action could be achieved among cast in situ beams, HCS units & cast in situ diaphragm cast in situ concrete, which of course shall be thinner than usual or conventional cast in situ slabs. It may be 60mm to 100mm, depending on requirements , in case some inserts may be added
26     Activities to prepare all items of cast in situ diaphragm slab shall be carried out
27     Inspections shall be conducted for combination of all combined items or components, to make sure that no movement is done & stability & integration are effected
28     Pouring concrete shall be done, on placed HCS & reinforcement, as if HCS acting as permanent forms
29     On successful completion of this combination of three subcomponents of slab item, it would act similarly, as if it has been constructed by conventional cast in situ method
30     On situ columns & beams for next floor shall be similarly carried out
31     For this floor, all internal as well temporary arrangements shall be produced from working view points, keeping safety intact
32     Activities of RCC Columns & Beams shall be repeated, per designs & all procedures applied
33     Production & approvals of HCS units in factory shall be conducted for requirement meeting site schedule, using autoclaving if acceptable to save time
34     Repeat transportation of HCS units & direct placement on new floor, repeating all procedures as were carried out on lower floor
35     Then, repeat for every new floor, all such procedures, per design requirements



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Hollow Core Slabs HCS for Fast rack Construction
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