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Immediate Past President, ladies and gentlemen, members and guests of the Institution, it is both a great honour and a great pleasure to take office as President: when I started out on my professional career, it would have been inconceivable to imagine that, 30 years after graduation, I would have been elected to lead my chosen profession. I say this without any false modesty, and I have no doubts at all that the same sentiments would apply to any of my predecessors. It is doubly exciting for me to serve over the Millennium, not because of the symbolic significance of the date itself, but because of the large number of high quality, exciting projects that are being constructed or completed at this time which, I believe, will add significantly to the public perception of structural engineering (Fig 1).
I had decided more than a year ago to focus some of my
The Queen’s Building at Emmanuel College, Cambridge, was completed in April 1995. It provides the college with a 170-seat auditorium, reading rooms, common rooms, and music practice rooms. The building features a stone perimeter frame, constructed from Ketton stone, an oolitic limestone extracted from the Ketton Quarry in Lincolnshire.
M.G.T. Dickson and G.R. Werran
Two more contributors have reverted to this much-discussed topic. Stuart Marchant writes from London SW18:
I have been following the recent correspondence with interest and studying my own roof I fail to understand how Alasdair Beal(1 June 1999) infers that purlins greatly reduce the triangulation forces. The purlins in the roofs that I have seen are generally perpendicular to the rafters with inclined props. These will induce an axial load in the rafter in much the same way as a ridge board, although of a slightly reduced magnitude, resulting in an outward thrust at the wallplate.