Pin by Shelbyy' Norton on Structural Design Associates - Burton | Pinterest | SDA Burton | Call 01283 551111. As leading structural engineering consultants in Derby we undertake residential and commercial structural engineering projects across the UK.  Structural Design Associates 1A & 2A Oaktree Business Park Cadley Hill Road Swadlincote  Derbyshire DE11 9DJ Tel:  01283 551111        Fax: 01283 551119 Email: Google Places: | See more about engineering, derby and roads.