AELTC - Millennium Building, Wimbledon
Working for Apex Steel Structures, we designed all of the main frame steel to steel connection details on this project. The works were split into 3 packages relating to early enabling work and then main frame construction phase 1 and phase 2. Overall tonnage was around ####tons of steel with over 115 separate connection details. We try to use the same details for multiple members to reduce the overall number of differing details which need to be modelled and fabricated, however, the setting out of the frame and the variation in loadings and section sizes meant we were restricted in how far we could duplicate details. Notable items for this project would be the 700mm deep fabricated plate girders with 70mm thick flanges and a number of members with huge notches to affix to the existing concrete slab and columns.
(Cover image by Langstaff Day Architects)
Initial setting out of an area called the Cruciform (image: AKT II GA drawing)
Proposed design from the principal engineer. (image: AKT II GA drawing)
Our design model indicating internal stresses
The final details modelled for fabrication.
A 610mm beam notched by almost 400mm to slip under an existing slab
The stub is working very hard, but it will hold!
Huge crank to slip under the existing slab. Crank has been lowered by almost the full depth of the beam.
Load transfers from flange to flange as if it is a continuous beam. Stiffeners were required to prevent web buckling.