The structures were high and expectations even higher as some of the UK鈥檚 leading experts in the design and construction of tall buildings gathered for the Jenga Christmas challenge. In an afternoon of flair, passion and beer, only those with nerves of steel and hands of iron could survive. Readers of a nervous disposition should look away now鈥

This was the year that London became obsessed with tall buildings. There were towers going up, towers coming down so that other, bigger towers could take their place, and towers that were still only vague ideas, but had excellent names. Contractors were battling over the Helter Skelter and the Walkie-Talkie, engineers were working out the finer details of how to build a really big shard of glass, and demolition specialists just wanted to knock stuff down.

To celebrate these collective endeavours, 黑洞社区 has gathered some of the tall buildings experts who work on the London skyline (not to mention several kilometres worth of high-rise madness in Dubai). The scene is Doggett鈥檚 bar, a four-storey, sixties-built hymn to the cardboard box at Blackfriars. This is a pub that is standing defiantly in the way of progress, undaunted by the fact that the Beetham Corporation is about to build a 51-storey skyscraper in its back garden. Today it will be home to the greatest building challenge of them all: Jenga.

For the uninitiated, Wikipedia describes Jenga as 鈥渁 game of physical and mental skill in which players remove blocks from a tower and put them on top鈥. In construction terms, it鈥檚 like being presented with a drab 10-storey office block built from repeat materials with uninspired cladding, and then being asked to transform it into a futuristic 30-storey tower, built with a rakish twist and punctured by exciting holes, using only materials from the lower floors of the same building. Fittingly, when the whole structure comes crashing to the ground, you lose. Apparently, the word jenga is derived from kujenga, the Swahili verb 鈥渢o build鈥, jenga being the imperative form. Wikipedia truly is the fount of all knowledge. Some of it is even true.

The rules are simple: only one team member may play each go; they can鈥檛 remove blocks from the top three storeys; and the losers restack the tower.

The team news in full 鈥

Davis Langdon

How they line up Martin Jones, Hamish Summers and David Williams Track record The Shard, the Broadgate Tower, and half of Dubai

What the pundits say With budget no object, the money guys can loosen up and unleash their wildest ambitions. But, then again, the instinct to value-engineer does run deep and there鈥檚 no point building unnecessarily high, is there?

IstructE, represented by Techniker

How they line up Francesco Ferrari, Nick Hewson and Oliver Tiong

Track record Once engineered a glass box filled with fog for an exhibition by sculptor Antony Gormley

What the pundits say They have the technical expertise and the artistic vision, but may be weighed down by the fact that they carry the hopes of an entire profession on their shoulders

Keltbray

How they line up Mick Kelly, Jim O鈥橲ullivan and Dave Row

Track record If it鈥檚 been built, the chances are they鈥檝e tried to knock it down. Currently clearing the way for the Shard

What the pundits say Will want to prove there鈥檚 more to demolition than spectacular collapses 鈥 won鈥檛 they?

Lifschutz Davidson Sandilands

How they line up Danielle Dickinson, Lydia Firminger and Alessia Mosci

Track record Have just designed a 144m tower on Coin Street, down the road from Doggett鈥檚

Hey, we鈥檙e in the semis. This is live, Bill, live! He has it, he has the brick鈥 ohhhh鈥 you should come down, you really 鈥 hello? Bill?

Wsp鈥檚 Pete Townsend calls the office

What the pundits say Knowledge of the local terrain is invaluable. The only architects in the competition, they have the chance to prove that their ideas can stand up without engineers around to do the tricky bits

Mace

How they line up Gemma Harding, Matt Massey and Steve Wells

Track record Is building the Walkie-Talkie and has just won the contract to build the Shard

What the pundits say Will be keen to get stuck in after waiting for the Shard to start all autumn

WSP

How they line up Carrie Abrahams, Matt Coleman and Pete Townsend

Track record The Beetham Tower in Manchester, the Shard

What the pundits say The early favourites. WSP is even working on a project called the Jenga tower in Chicago, so presumably it got lots of practice in during the planning stage

黑洞社区 Graduate Advisory Board

How they line up Sophie Campbell of Sheppard Robson and Mark Chamberlain of NG Bailey

Track record None as yet 鈥 this could be their big break

What the pundits say They鈥檙e young, they鈥檙e fearless, anything can happen

黑洞社区鈥檚 Technical Desk

How they line up Nick Jones, Stephen Kennett and Tom Lane

Track record Stephen has a degree in structural engineering, Tom has a hangover

What the pundits say Not expecting much from this lot, apart from maintaining a superior attitude and criticising everybody else鈥檚 attempts

The heats

First up it鈥檚 Davis Langdon vs Lifschutz Davidson Sandilands. Well, actually it鈥檚 not, because the Lifschutz team鈥檚 lunch has just arrived so their hosts gamely swap places in the draw. The 黑洞社区 team is pinning its hopes on technical editor Tom鈥檚 extensive knowledge of structural tensions. But Tom has a hangover, and is gingerly sipping orange juice in the corner.

It鈥檚 a stupid game anyway

Matt Massey, Mace

For a while, it looks as if the first game will also be the last, as it stretches into an epic 40-minute battle of concentration and nail-biting suspense. For Davis Langdon, a consultant that prizes its reputation as a project manager, the time overrun must be a concern.

Belying his hangover, Tom is quickly in the zone, systematically knocking on each block like a builder who has come round to suck his teeth at the crack in your cavity walling. 鈥淚t鈥檚 pure instinct with Tom,鈥 says team-mate Stephen in awe.

As the tower passes the 1.20m mark, swaying wildly every time anyone so much as glances at it, it seems that each go will be the last. The room holds its breath. It鈥檚 incredibly tense. And incredibly, the tower reaches 1.40m before Stephen brings it crashing down and the hosts are out in the first round.

As the inquest begins among the 黑洞社区 team (鈥淗aven鈥檛 you got a structural engineering degree, Stephen? Isn鈥檛 that like a qualification in Jenga?鈥), the second heat, between Mace and 黑洞社区鈥檚 graduate advisory board, sets off at a terrific pace, much to the relief of all spectators. 鈥淚 don鈥檛 know what all the fuss is about鈥, says Mace鈥檚 Matt as he plucks out a brick and breezily sets it on top of the tower. But his confidence is misplaced. After just 13 minutes he finds himself standing ankle deep in debris, staring in disbelief at the brick in his hand. 鈥淚t鈥檚 a stupid game anyway,鈥 he grumbles.

Next up are the structural engineers 鈥 WSP and Techniker. The guys from Techniker are actually here representing the Institution of Structural Engineers and seem slightly daunted: 鈥淲e didn鈥檛 know we were representing a whole profession,鈥 says Nick.

The pairing brings something new to the tournament: skill. Pete from WSP winkles out a centre block while the one above it is clearly loose. Bizarrely, when Nick comes to remove the loose brick, it is stuck like glue. How? There is clearly an invisible hand helping WSP, and Techniker crash out at 1.35m, taking Nick鈥檚 pint of beer with them.

The team from demolition specialist Keltbray have now sat on their hands for three heats. This is like Michelangelo being forced to watch Rolf Harris paint the ceiling of the Sistine Chapel. Finally, heat four pits them against Lifschutz Davidson Sandilands, and it鈥檚 soon evident that their natural instincts are going to be a telling factor: their first moves are to remove two out of three of the blocks from the bottom layer. 鈥淚t makes every block difficult from the beginning. It鈥檚 more fun,鈥 says Dave gleefully.

LDS鈥 weak point is indecision. 鈥淭ake that one,鈥 Lydia advises Danielle. 鈥淥r maybe not 鈥︹ But it鈥檚 not a great surprise when, at 1.15m, Keltbray swing the metaphorical wrecking ball. They seem happy with the result. 鈥淚t was clean, controlled,鈥 says Mick. Dave nods: 鈥淚t was starting to fall, so Mick held it and made sure the area was clear.鈥

Semi-Final 2

WSP vs Lifschutz Davidson Sandilands

Graduate Mark, still lingering in the arena, has set himself up as the John Motson of Jenga. 鈥淭here鈥檚 some interesting techniques here,鈥 he says, with only a trace of irony. 鈥淥ne hand, two hands鈥︹ He even manages to muster up some Mottie-esque indignation on behalf of the paying punter. 鈥淭hey鈥檙e just not entertaining the fans,鈥 he grumbles, looking at the bemused bar girl.

As the teams rattle through the early stages of tower extension, discussion turns to the advantages of long fingernails. Mark鈥檚 keen to come back next year with a manicure, but given his rather large hands, he鈥檇 probably just end up alarming the opponents. 鈥淚t鈥檚 definitely easier with smaller hands,鈥 calls out Lydia, from the Jenga pit. Then she returns to her conversation with the bricks. 鈥淗ow about you?鈥 she coos.

WSP鈥檚 Matt, bored with Lydia鈥檚 dallying, has wandered off. When he wanders back, Lydia is still on the floor, having finally chosen a brick,

but 鈥 鈥淪top!鈥 shout her team-mates. 鈥淚 can鈥檛 just stop,鈥 she wails, the brick half hanging out. She鈥檚 somehow spun the brick around without actually removing it. This is some odd Jenga.

At 118cm, tensions are rising. Then Pete鈥檚 phone rings. 鈥淗ey Bill, we鈥檙e in the semi. Yeah. It鈥檚 Matt鈥檚 go. Yeah. We are about five pints down the road 鈥︹ Whoever Bill is, he doesn鈥檛 seem impressed, much to Pete鈥檚 dismay. 鈥淭his is live Bill, live! He has it, he has the brick 鈥 ohhhhh 鈥 you should come down, you really 鈥撯 But the phone has gone dead.

Lifschutz return to the floor. 鈥淎m I taking this one?鈥 asks Lydia hesitantly. 鈥淵eah, we鈥檒l be here all night otherwise,鈥 is Danielle鈥檚 response. Lydia does as she is told, but she鈥檚 not happy. 鈥淚 don鈥檛 think this is a very good idea鈥 Shall I just 鈥撯

WSP are in the final.

Semi-Final 1

Davis Langdon vs the 黑洞社区 Graduate Advisory Board

I feel like Carol Vorderman

Stephen Kennett, 黑洞社区

With the also-rans out of the way, and the daylight fading, it鈥檚 down to the serious business of the semi-finals. As the tower gets rebuilt, the teams are discussing tactics.

The grads want to inject some pace into proceedings, while the more cautious Davis Langdon are planning to press their height 鈥 and numeric 鈥 advantages. 鈥淭here鈥檚 three of us to two of them,鈥 David whispers, conspiratorially. Nobody like a QS for picking up on the vital stats.

Davis Langdon start but soon hit trouble. While David hesitates over his move, graduate Mark looms over him in an intimidatory fashion. 鈥淚s that a legal move?鈥 Mark asks, as David finally takes a brick from suspiciously near the top of the tower (see page 47 for 黑洞社区鈥檚 exhaustive set of rules). 鈥淚t will be a hollow victory if you win.鈥

To rub salt in the wound, the fast-moving Sophie then plays her go in a record 10 seconds. 鈥淥h, right,鈥 says David, slightly humiliated. 鈥淚 probably took some of the weight off.鈥

Back to Davis Langdon, and Martin鈥檚 move causes the tower to lean dramatically to the left. He starts to walk away, but by some miracle the tower stabilises. 鈥淚t鈥檚 amazing how these towers stay up,鈥 muses Dave from Keltbray.

鈥淏efore they come down, leaving a nice pile of rubble,鈥 he adds wistfully.

Luck may be with Davis Langdon, but the grads鈥 controversial 鈥渟teadying hands鈥 have been keeping them in the game. Until, that is, Sophie takes the floor. Tapping the bricks a little too diligently, the tower lurches. Sophie throws her arms around it, as if slow-dancing with a drunk, but it鈥檚 too late.

The QSs are through 鈥

The final

Davis Langdon vs WSP

So here it is. The clash of the titans. The team led by David Williams, the only man to play Jenga in a sharp suit and tie, versus a collection of inebriated structural engineers. Who are outside having a fag. The sledging begins immediately on their return.

What does Matt think of his opponents鈥 chances? 鈥淭hey鈥檙e bean counters!鈥 he says with contempt. 鈥淲ho give WSP a lot of work,鈥 David reminds him. Matt tries to smooth things over: 鈥淵es! Nice bean counters 鈥︹

That should do it.

With the competition already running almost an hour late, there鈥檚 a new rule: a limit of one minute a go. 黑洞社区鈥檚 Stephen, the man responsible for the home side鈥檚 early exit against Davis Langdon, is in charge of the watch. Davis Langdon are not happy. But Stephen seems to be enjoying himself: 鈥淚 feel like Carol Vorderman,鈥 he says.

The game begins steadily, but as WSP鈥檚 Carrie moves towards a brick, there鈥檚 a shattering sound behind us. 鈥淭he shard of glass!鈥 yell the Keltbray team from the back of the room. Someone is waving the remnants of a pint glass, close to where the Mace team are sitting. 鈥淭he Shard鈥檚 started! It鈥檚 the Shard team at work! Go Shard!鈥

The Keltbray team are naturally still clamouring for demolition, but at 1.15m the tower is holding firm.

鈥淭wist it out, Carrie, twist! Work it, work it,鈥 Pete is yelling, like a crazed gym instructor. Then it鈥檚 David鈥檚 go, and the pace drops again 鈥 dangerously so. 鈥淭wenty!鈥 calls Stephen. 鈥淣ineteen!鈥濃淐ome on,鈥 Hamish appeals to 黑洞社区鈥檚 Grim Reaper. 鈥淚f we win, it means you came second.鈥 It鈥檚 appealing logic, but Stephen is unfazed. 鈥淔ive, four, three鈥︹ David removes the brick, and the tower wobbles woozily. But for the second time in a Davis Langdon clash this afternoon, the tower refuses to obey the laws of physics. 鈥淭hese are Davis Langdon blocks!鈥 comes the shout from the back.

It鈥檚 back with WSP, and Matt, now almost as unsteady as the tower, is on his knees besides what is now a highly precarious structure. He stares, he prods 鈥 and it鈥檚 all over. The Jenga falls on Matt, and Matt falls on the floor. The tower 鈥 and WSP鈥檚 dreams of glory 鈥 are in ruins.

Tiny towers

With the Giant Jenga game running way over time and the drinks budget, something had to be done to keep the teams amused while waiting for their heat. Bar billiards and darts are nowhere to be seen, so 黑洞社区 hit on a brilliant idea: more Jenga. Mini Jenga this time in which the teams play on their own and the one with the highest tower wins. Here are the teams鈥 vital statistics, with expert game analysis.

WSP 44.5cm Carrie鈥檚 ambidexterosity is WSP鈥檚 secret weapon. But WSP鈥檚 five-minute strategy meeting before the start also pays dividends. Pete鈥檚 rule that there should be 鈥渘o running, skipping, jumping or fat people walking near our table鈥 is probably key.

Keltbray 43.5cm At one point they play 鈥渂lind Jenga鈥, where Jim and Mick tell Dave (who isn鈥檛 looking) where to put his hand. Perhaps there is method in the madness but it鈥檚 anyone鈥檚 guess what it is.

Techniker 40.5cm The group decide the best technique is to feel around for the 鈥渄odgy鈥 blocks and remove those first. It doesn鈥檛 seem the most scientific of approaches but produces the most interesting looking tower, with a balcony effect down one side.

LDS 39.5cm A shaky start but it evens up when Alessia decides it is a game of balance; each piece they take out is added to the opposing side. Danielle鈥檚 long nails help her tap the blocks out 鈥 they call it the 鈥渨oodpecker approach鈥.

黑洞社区 39.5cm 黑洞社区鈥檚 technical desk begins by quibbling with the manufacturing tolerances of the blocks. They start low, removing the middle pieces first. Before they can enjoy the fruits of this strategy, the building topples over.

Mace 38cm At one point the tower topples and Gemma manages to catch it and prop it back up. The referee feels such athleticism should not go unrewarded and lets them play on. But the 鈥渟tructural integrity鈥 has been compromised and the swaying tower collapses at the next touch.

Davis Langdon 32.5cm DL is hardly at the table long enough to develop a strategy. The winners of Giant Jenga just can鈥檛 take the intensity of the mini version. In minutes, it鈥檚 over.

The art of destruction

If the Jenga tower has one failing as a standard design, it鈥檚 that it can be a little prosaic. While the final was coming to its dramatic climax,
Mace 鈥 keen to prove they鈥檝e got what it takes to build the Shard at London Bridge 鈥 took a more imaginative approach to the Mini Jenga. Keltbray 鈥 keen to prove they鈥檝e got what it takes to clear the site for the Shard 鈥 then did what Keltbray do best 鈥