Topic 4 – Pgs
A margin of safety are the limits that ensure the safe performance of a structure Pictures of highway signs
Testing usually pushes a structure to the extreme Monitoring allows use to keep track of the stronger and weaker parts of a structure
Climatic conditions Think of houses built in areas where hurricanes are common Terrain conditions Soft or shifting soil can spell disasterdisaster Earthquake risk Special designs help stabilize structures affected by earthquakes
Corrugation Using a material that is formed into wave-like ridges or folds Commonly used in cardboard and metal Lamination Gluing layers of material together to create a strong bond Think of laminated paper
Remember what shape is the strongest? Using trusses or arches can improve strength See page 330 for examples
1. Cost How much are the materials? How much to build it? How much to operate it? 2. Benefits What are the benefits and who will enjoy the benefits? 3. Safety Are there safety risks? How do we prevent these risks? 4. Environmental Impact What steps can be taken to reduce environmental harm? How will waste materials be disposed of?