We are not afraid of unusual projects:
Record Lego® - Bridge
For a staff day of the Management Consulting Agency PricewaterhouseCoopers (PWC), immersive SIM engineering, in cooperation with Event Agency FLOWmotion, the Architect's Office T. Unterlandstättner - M. Schmöller and the Lego specialist Paul Friese (event management), developed a walkable bridge entirely made of Lego for entry in the Guinness Book of Records.
Apart from using Lego parts as rather unusual material for static constructions the specifications included the following demands:
- Construction period beginning from single parts to first walk on the bridge approx. 60 min
- more than 500 persons being inaugurated directly before starting the project must be able to operate simultaneously
- after the event, the Lego parts would be contributed to kindergartens
- maximum load in action: 2-3 persons
- bridge span: 3 m
- no prototype or testing of the structure possible beforehand
Point 1. and 2. made some conceivable building methods impossible and required a construction by modules. Point 1. and 3. forbade the use of adhesive.
A basic sub-construction made of Lego was not required, but we would not be engineers, if that had not waked our ambition...
After overcoming some non-technical starting problems ("where is the box with Lego parts from my childhood", or "how do I explain to my children that Daddy now needs the Lego bricks for some time"), our office rather resembled a kindergarten (you can surely imagine the astonished faces of suppliers watching engineers crawling on the ground between mountains of Lego bricks).
The experience gathered by those studies, analytical calculations and FEM analyses finally resulted in constructing an unconventional framework made of Lego beams without tensile loads, supporting a base plate also made of Lego to be walked on. The base plate provides for the lateral stability of the construction. In this way the bridge could be completely realized with Lego, besides of some aluminum connecting links.
Building up the bridge took place at Munich Ungererbad on 17th August 2001, was a total success and big fun for all.
- Bridge span: 3 m
- Number of Lego parts: 120000
- Time for construction: 73 min
P.S: Not long before dismantling after success, the bridge prooved reliability being loaded by 12 persons (there wasn't enough space for more ...)