5627 1ST AVE SE 2016-01-01 MF Import

� ,�, _ ARC STANDARD ROCKERY CONSTRUCTION GUIDELINES Rock Size Rock Weieht Averaee Dimension One man 50-200 pounds 12 to 18 inches Two man 20p-700 pounds 18 to 28 inches T�� 700-2000 pounds 28'to 36 inches Four man 2000-4000 pounds 36 to 48 inches . Five Man 4000-6000 pounds 48 to 54 inches , Siz Man 6000-8000 pounds 54 to 60 inches In rockeries over eight feet in height, it should not be possible to move the lazge siud rocks(four to six-man siu) with a pry baz. If these rocks can be moved, the rockery should not be considend capable of resaaining any signifcant lateia!load. However, it is both practical and even desirable that smaller rocks, pazticularly those used for"chinldng" pu�poses, can be moved with a pry baz to achieve the "best fit". 2.01.4 Submittals: 'Ihe rock source shall pn:sent curtent geologic and test data for the minimum guidelines . described in Secdon 2.01.1 on request by either ihe rockery contractor,the owner, or the applicable agency. . ' 3.01 Rcekerv Construction: ; 3.01.1 General: Rockery constmcuon is a craft and deFcnds lazgely on the stdll and experience of the �' builder. A rockery is a protecdve system which helps to retard the weathering and erosion process acting ' on an exposed cut or fill soil face. While by its nature(we mass,size and shape of the rocks) it will piovide some undetermined degtee of ietention, it is not a designed or engineered system in the scnse a reinfocced � concrcte retaining wall would be considered designed or engineered. The degree of�eten�ion achieved is dependant on the size of rock used; that is, the "mass" or wcight, and the height of the rockery being con- saveted. 'Ihe larger the rock, the mo�e competent ihe rockery. To accomplish an appropriate degree of I � compecency, all rockeries in excess of four feet in height should be built on a "mass" basis, i.e. by the ton. , � 12�p5/9� Page 3 _ � �• -