Resources for the Future Pizer and Kopp. 3. cost to the economy.5 This is the notion of cost most often described by economists (e.g., Harberger 1971; Diamond and Mirrlees 1971). Defining and estimating Ci ()az, is far from trivial.
For stepping stones that are going to see a lot of use, you should consider using reinforced concrete so that your stepping stones are more durable. This type of concrete also sells at most hardware stores, often under the names gravel mix reinforced or fiber reinforced premixed concrete..
Step Treads are available in Aluminum and Steel with 3/16 thick plain top or serrated top bar grating. The National Safety Council indicates that many falls are caused by slipping off the edge of steps so on Bustin products, we supply a non-slip edge called âNosing.â. Bustin's aluminum step treads meet OSHA regulation 1910.24(f) and come standard mill finish.