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PRE FABRICATED

MODULAR STRUCTURES

GUIDED BY: SOUMYA MISS ASST PROFFESSOR, UKFCET, KOLLAM

PRESENTED BY: FAIZAL.A.M 7THSEMESTER CIVIL ENGINEERING

UKFCET, KOLLAM


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Content

IntroductionFeaturesComparison

Design conceptComponentsTypes of precast

systemDesign

consideration

EquipmentsAssemblingschedulingAdvantagesLimitations

Conclusion references


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Int!o"#$t%on

The concept of precast structures also!no"n as prefabricated# modularstructures$

The structural components arestandardi%ed and produced in plants in alocation a"ay from the building site$

Then transported to the site for assembly$

The components are manufactured byindustrial methods based on massproduction in order to build a large numberof buildings in a short time at lo" cost$

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Fe&t#!e

The division and speciali%ation of the human"or!force$

The use of tools' machinery' and otherequipment' usually automated' in the

production of standard' interchangeableparts and products$

Compared to site(cast concrete' precastconcrete erection is faster and less a)ected

by adverse "eather conditions$*lant casting allo"s increased e+ciency'

high quality control and greater control on,nishes$

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Co'(&!%on

S%te)$&t no transportation the si%e limitation is depending on the elevation capacity only lo"er quality because directly a)ected by "eather proper' large free space required

P!e$&t &t (*&nt transportation and elevation capacity limits the si%e(higher' industriali%ed quality . less a)ected by "eather no space requirement on the site for fabricationunlimited opportunities of architectural appearance

option of standardi%ed components/


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De%+n $on$e(t o!(!e$&t $on$!ete

-#%*"%n+The design

concept ofthe precast

buildings isbased on1$build ability$$economy

&$standardi%ation ofprecastcomponents$

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P!e$&t $on$!etet!#$t#!&* e*e'ent

P!e$&t *&-

P!e$&t Be&' G%!"e!


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P!e$&t Co*#'n

P!e$&t /&**


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P!e$&t

t&%!

*recast concrete 4tairs4teel plates supported on steel

beams


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De%+n $on%"e!&t%on

,nal position and loadstransportation requirements . self load

and position during transportationstoring requirements . self load and

position during storing . 5avoid or storein the same position as it transported #built in6

lifting loads . distribution of liftingpoints . optimal "ay of lifting 5selectionof lifting and rigging tools6

vulnerable points 5e$g$ edges6 .reduction of ris! 5e$g$ rounded edges6

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T0(e o (!e $&t 0te'

1$ Large(panel systems$ Frame systems

&$ 4lab(column systems "ith "alls

-$ 8i9ed systems

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bo9(li!e structure$both vertical and

hori%ontal elements areload(bearing$

one(story high "allpanels 5cross("all system# longitudinal "all system# t"o "ay system6$

one("ay or t"o "ayslabs$

1

1$ Large(panel systems


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$ Frame systems

Components areusually linearelements$

The beams areseated on corbels ofthe pillars usually"ith hinged(:oints5rigid connection isalso an option6$

;oints are ,lled "ithconcrete at the site$

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&$Lift(slab systems ( partially precast in plant

5pillars6 # partially precaston(site 5slabs6$

( one or more storey high

pillars 5ma9 /6$ ( up to &7 storey high

constructions$

( special designed :ointsand temporary :oints$

(slabs are casted on theground 5one on top of theother6 . then lifted "ithcrane or special elevators$

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Lift(slab procedure

1/

1$ pillars and the ,rst pac!age 5e$g$ / pieces6 of slabsprepared at ground level$ lifting bo9es are mounted on the pillars < a single

slab lifted to the ,rst =oor level&(2$ bo9es are sequentially raised to higher positionsto enable the slabs to be lifted to their required,nal position ( slabs are held in a relative 5temporary6positions by a pinning system


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P*&nn%n+ t!&1$ !o#te

>o" long transportervehicle is required?

@hat is the requiredload capacity of thetransporter vehicle?@hat is the ma9imum

vertical e9tension ofthe shipmentouts on the site

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B Is route permissionrequired?


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E2#%('ent

cranes mobile crane

to"er crane5above &stories6

lifting tools

spreader beams

"ire rope slings

rigging tools

eye bolt

sha!les

hoo!s 1


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Ae'-*%n+3.

12

Co*#'n to $o*#'n $onne$t%on


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Be&' to $o*#'n $onne$t%on

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Be&')*&- 4o%nt

7


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1

*recast concrete structure consisting

of solid "all panels and hollo" coreslabs$

/&** to *&- $onne$t%on


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A"5&nt&+e

uic! erection times*ossibility of conversion' disassembling

and moving to another site*ossibility of erection in areas "here a

traditional construction practice is notpossible or di+cult

Lo" labor intensivityeduce "astage of materialsEasier management of construction sitesetter overall construction qualityIdeal ,t for simple and comple9 structures


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L%'%t&t%on

si%e of the units$location of "indo" openings has a

limited variety$

:oint details are prede,ned$site access and storage capacity$require high quality control$

enable interaction bet"een designphase and production planning$di+cult to handling transporting$

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S$6e"#*%n+

o'e &((!o%'&te "&t& o! %nt&**&t%onemplacement of hollo" core =oor slabs (

&77 m#dayerection of pillars#columns ( 2 pieces#dayemplacement of beams ( 1/ pieces#dayemplacement of double tee slabs ( /

pieces#day

emplacement of "alls ( 1/ pieces#dayconstruction of stair and elevator shafts (

=oors#day

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E&'(*e3.

/

The hospital "ill feature multi(trade prefabricated rac!s in thecorridors' an

approach that is still ne" in the G$4$


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0

8iami Halley >ospital Dayton'>


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Con$*#%on

o

The use of prefabrication and preassembly isestimated to have almost doubled in the last1/ years' increasing by 20J$oThe use of precast concrete construction cansigni,cantly reduce the amount of construction"aste generated on construction sites$o educe adverse environmental impact on

sites$o Enhance quality control of concreting "or!$

o educe the amount of site labour$o Increase "or!er safety $o ther impediments to prefabrication and

preassembly are increased transportation

di+culties' greater in=e9ibility' and moreadvanced procurement requirements$


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Ree!en$e

K1 4%Mnyi L$ Construction of prefabricated reinforcedconcrete buildings' 711

K enett' D$ Concrete Elegance 77-$ Concrete Centre'77/

K& *recast Concrete 4tructures$ """$paradigm$in

71$17$17 K- 4$ r%ev' T$ Nuevara(*ere% *recast Concrete

Construction$http##business$management0$com#*ECA4T(COCETE(CO4TGCTIO(pdfe1&1-$

K/ 4on:oy Deb *recast Concrete for uilding4ystemshttp##masterbuilder$co$in#Archives#uildingJ78aterials#Concrete#*recastJ7 ConcreteJ7forJ7uildingJ74ystems$pdf 71$17$17

K0 Lift slab

systemhttp##"ebs$demasiado$com#for:ados#patologia#liftPslab#aspect#inde9$htm71$17$& 2


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3

uestions ?$$$$$


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&7

Than! you

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