SDI installed two small spring and lock shutters on these market stalls at the new Wolverhampton market, at a construction site in the centre of the city. Not shown is a 5 x 3m shutter we also installed during the day. 1 meter from floor level, we had to use a special rope trick, or we 'roped up' the curtain so that we did not have to work at height or work on step ladders.