Tramezzino: a triangulated sandwich panel?

The tramezzino is a: triangular Italian sandwich with the crusts removed and are popular and inexpensive. The origin of the tramezzino can be found in (Caffè Mulassano) in Turin where I worked for Andrea Bruno Architetto and where I also met both la Juve and Lingotto.  The tramezzino I understand to be a halfway, between breakfast and lunch but also between the triangle and the regular polygon. I like triangles. It reminds me of Polynesia as triangulation in navigation gives 3-point geo-spatial fixity. What happens if we triangulate the fibre cement sheet cladding on our proposal by cutting along the diagonals?


“Look mum, no hands!” Secret fixing is the architectural equivalent of riding your bike with no hands. That’s really not so difficult when actually “Look mum, doing a wheelie” is far more daring. Your hands are on the bike but the bike is being propelled at a balanced crazy angle. Even better is a rodeo-like one-handed wheelie. Trying to implement difficult architectural geometries made me question whether it is then necessary to complicate matters with the economic overlay of secret fixing which often requires curtain walling ‘cassette cladding’ diseconomies to create material strength through extruded depth. One could secret fix though through bonding: a triumph of the chemical over the mechanical. Or is it? How do the insurers / warrantors assess the fixation risk? Mechanical could puncture a waterproofing membrane for example. SuperGlue was promoted when I grew up as ‘one drop holds a tonne’ but these were laboratory conditions promoting tensile not shear strength. And who says the contractor applies the correct amount when cost cutting quantities increases profit? The name’s Bonded, James Bonded? Doubtful when he still uses a mechanically propelled weapon. So let’s keep it simple: a mechanical face-fixed stainless steel screw is relatively low-tech ‘8-bit solution’ for an easy fix without the need for an ‘Approved Installer’> given the affordability crisis affecting house building in London I am convinced this is the way forward.    


As much as brick corbelling is of innovative interest and fits the brick context, brick doesn’t stack up. In terms of weight, 22,000 bricks @ 2.4 kg per brick means the cladding would weigh 50 tonne and increase pile loads even before we cladding one considers Ancon bracket shelving @ 6kg/m). A lighter cladding system would reduce pile loads from say 10kN/m to, for example slate, to 2kN/m. In terms of time, assume 500/day given a good brick layer corbelling = 44 days * 1.5 risk = 66 days but let’s say 2 months… plausible if the programme was split into parallel interior and exterior works). So what are the cladding alternatives? Cor-Ten? Good fit in terms of contextual robustness but proprietary Cor-Ten systems at first glance could be Kingspan’s curtain walling. Not cheap at £100/sqm supply doubling to £200/sqm installed = £70k. Also the Kingspan system is a say 1.5mm thick biscuit tin fitted as a ‘cassette’ on a curtain walling system. Many of such systems look like commercial warehouse façades. Ask Kingspan if there CNC system allows for large 2m high panels say supported internally by a timber cross member to avoid the biscuit tin from denting. Plywood? Our House on Motiti (in New Zealand) was made in 1996 utilising 12mm thk rough faced WBP type ply. How does it look 20y later? Will ask the client who still lives there today… Visual degradation, say due to surface discolouration as evident in Lynch Architect’s Greenwood Road house, could be attended to by staining so how did Motiti perform in terms of water tightness? And how could it inform self-building in London? I see the House K – Tham & Videgård Arkitekter also used plywood so it seems it could work in a European environment. I believe the Dubbel Huis by MVRDV was also plywood clad as was David Adjaye’s Electra House. So using the filmic equivalent of a ‘rush’ deploying blending raw fast techniques, in this case Tham & Videgård, our project in Peckham might, fenestration not pertaining, might look like: