3611 FEDERAL AVE 2018-01-02 MF Import

2.01.2 Freauencv of Testing: Quarry sources for rockery rock shall begin a testing program when either becoming a supplier or when a new area of the source pit is opened. The tests described in Section 2.01.1 shall be performed for every four thousand (4000) tons for the first twelve thousand (12000) tons of material blasted and removed to establish that specific rock source. The tests shall then be performed once a year or at an apparent change in material. If problems with a specific area in a pit or with a particular material are encountered, the initial testing cycle shall be restarted. 2.013 Rock Density. Recognizing that numerous sources of rock exist, and that the nature of rock will vary not only between sources but also within each source, the density of the rock shall be greater than one hundred fifty. five (155) pd. Typically, rocks used for rockery construction shall be sized approximately as follows: Rock Size Rock Weight Small to large 50-200 pounds one man Small to large 200-700 pounds two man Small to large 700.2000 pounds three man Small to large 20004000 pounds four man Five Man 4000-6000 pounds Six Man 6000-8000 pounds Two and one-man rock, and sometimes smaller, are often used to fill surface gaps along the top of the completed rockery to create an aesthetically pleasing surface. This is an acceptable practice provided none of the events described in Section 3.01.5 occur, and that the owner prevents people from climbing or walking on the completed rockery. In rockeries over eight feet in height, it should not be possible to move the large sized rocks (four to six -man size) with a prybar. If these rocks can be moved, the rockery should not be considered capable of restraining any significant lateral load. However, it is both practical and even desirable that smaller rocks, particularly those used for "chinking" purposes, can be moved with a prybar to achieve the "best fit". 2.01.4 Submittals: The rock source shall present current geologic and test data for the testing for the minimum guidelines described in Section 2.01.1 on request by either the rockery contractor, the client, or the applicable municipality. 3.01 Rocked Construction: 3.01.1 General: Rockery construction is a craft and depends largely on the skill and experience of the builder. A rockery is a protective system which helps to retard the weathering and erosion process on an exposed cut or fill soil face. While by its nature (the mass, size and shape of the rocks) it will provide some degree of reten- tion, it is not a designed or engineered system in the sense a reinforced concrete retaining rockery would be considered designed or engineered. The degree of retention achieved is dependant on the size of rock used; that is, the mass or weight, and the height of the rockery being constructed. The larger the rock, the more competent the rockery. To accomplish this, all rockeries in excess of four feet in height should be built on a "mass" basis. To provide a competent and adequate :ockery structure, all rockeries constructed in front of either cuts or fills in excess of eight feet in height should be bid and constructed in accordance with these standard guidelines and the geotechnical engineers supplemental recommendations. Both the standard guidelines and the supplemental geotechnical recommendations should be provided to prospective bidders before bidding and the start of construction. 4/4/87 Page 2