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Raising the Roof | National Geographic


the design of he throws Terminal five is

the design of he throws Terminal five is deceptively simple but constructing it

deceptively simple but constructing it

deceptively simple but constructing it is an extremely complex job

the site 45 is as big as Hyde Park in

the site 45 is as big as Hyde Park in London

London

London but for an airport architect it feels

but for an airport architect it feels

but for an airport architect it feels rather small you never have picked this

rather small you never have picked this

rather small you never have picked this site for an airport building by choice

site for an airport building by choice

site for an airport building by choice it’s trapped between two live runways

it’s trapped between two live runways

it’s trapped between two live runways some of the busiest in the world it’s

some of the busiest in the world it’s

some of the busiest in the world it’s inside the m25 on the west and here for

inside the m25 on the west and here for

inside the m25 on the west and here for perimeter road so you’re in a box that

perimeter road so you’re in a box that

perimeter road so you’re in a box that you can’t move out of and it makes the

you can’t move out of and it makes the

you can’t move out of and it makes the building very very complex Mike Davis

building very very complex Mike Davis

building very very complex Mike Davis designs a 40 metre tall terminal and to

designs a 40 metre tall terminal and to

designs a 40 metre tall terminal and to make the most of the space inside he

make the most of the space inside he

make the most of the space inside he tops it with a single span roof the size

tops it with a single span roof the size

tops it with a single span roof the size of five football fields

but raising this monster roof becomes

but raising this monster roof becomes one of the biggest challenges for the

one of the biggest challenges for the

one of the biggest challenges for the construction team

construction team

construction team just one piece of it weighs more than

just one piece of it weighs more than

just one piece of it weighs more than six jumbo jets lifting it up 40 meters

six jumbo jets lifting it up 40 meters

six jumbo jets lifting it up 40 meters with tower cranes would create a problem

the cranes would be so tall they would

the cranes would be so tall they would disturb the heat for a radar system

disturb the heat for a radar system

disturb the heat for a radar system which kicks in only three meters above

which kicks in only three meters above

which kicks in only three meters above the ceiling of t5 we can’t poke cranes

the ceiling of t5 we can’t poke cranes

the ceiling of t5 we can’t poke cranes up into that area otherwise you might

up into that area otherwise you might

up into that area otherwise you might collect under carriages and so on so

collect under carriages and so on so

collect under carriages and so on so basically we had to conceive a design

basically we had to conceive a design

basically we had to conceive a design which could really be built from below

the construction team assembled the roof

the construction team assembled the roof sections on the ground with a series of

sections on the ground with a series of

sections on the ground with a series of small cranes then they use a clever

small cranes then they use a clever

small cranes then they use a clever lifting technology to pull the roof off

lifting technology to pull the roof off

lifting technology to pull the roof off the ground

the ground

the ground it’s called strand Jacky

they suspend the sections in steel wires

they suspend the sections in steel wires these wires run through the Strand jacks

these wires run through the Strand jacks

these wires run through the Strand jacks powerful hydraulic rams that can each

powerful hydraulic rams that can each

powerful hydraulic rams that can each lift a hundred and eighty-five tons

lift a hundred and eighty-five tons

lift a hundred and eighty-five tons sixteen of these jacks will

sixteen of these jacks will

sixteen of these jacks will painstakingly lift the roof section all

painstakingly lift the roof section all

painstakingly lift the roof section all the way up to the tenth floor that’s the

the way up to the tenth floor that’s the

the way up to the tenth floor that’s the plan anyway

on the 6th of April 2004 the

on the 6th of April 2004 the construction team are ready for the

construction team are ready for the

construction team are ready for the first big lift

first big lift

first big lift one of the problems of lifting a 2200

one of the problems of lifting a 2200

one of the problems of lifting a 2200 tonne plate 110 by 56 metres why is that

tonne plate 110 by 56 metres why is that

tonne plate 110 by 56 metres why is that it could walk as you going up the think

it could walk as you going up the think

it could walk as you going up the think of flex so we had to lift it to within a

of flex so we had to lift it to within a

of flex so we had to lift it to within a centimeter less than a centimeter on

centimeter less than a centimeter on

centimeter less than a centimeter on every jacking point so we had to keep

every jacking point so we had to keep

every jacking point so we had to keep that absolutely perfectly flat as it

that absolutely perfectly flat as it

that absolutely perfectly flat as it went up and when it got to the top it

went up and when it got to the top it

went up and when it got to the top it had to be within very fine tolerances to

had to be within very fine tolerances to

had to be within very fine tolerances to be able to put the pins in and lock it

be able to put the pins in and lock it

be able to put the pins in and lock it off so it was absolutely perfect

and yes it’s rather strange you’re

and yes it’s rather strange you’re sitting in a construction site with big

sitting in a construction site with big

sitting in a construction site with big construction guys but actually the guys

construction guys but actually the guys

construction guys but actually the guys on a computer controller he’s jacking

on a computer controller he’s jacking

on a computer controller he’s jacking system off the computer so gone is the

system off the computer so gone is the

system off the computer so gone is the idea of the big levers there’s the crane

idea of the big levers there’s the crane

idea of the big levers there’s the crane driver as it were working on the

driver as it were working on the

driver as it were working on the computer monitoring the movement of this

computer monitoring the movement of this

computer monitoring the movement of this thing centimeter by centimeter up

it takes almost a year to jack up all

it takes almost a year to jack up all the roof sections over 18,000 tons of

the roof sections over 18,000 tons of

the roof sections over 18,000 tons of steel in total

steel in total

steel in total but the effort pays off

the free floating roof maximizes the

the free floating roof maximizes the space inside t5 has as much floor space

space inside t5 has as much floor space

space inside t5 has as much floor space as he throws for other terminals

as he throws for other terminals

as he throws for other terminals combined

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