Laserfiche WebLink
Mr. David Klein 4 October 7, 1998 <br /> GME Project No. 7940 <br /> from the elevation of the grade in front of the walls to within 1 <br /> foot of the top of the walls, we recommend placing a layer of free <br /> draining sand or sand and gravel such as 3/4 inch crushed rock to <br /> form a drainage layer. <br /> The boulders should be placed along the inclined geogrid wrapped <br /> backfill . The boulders should consist of durable angular rock. Each <br /> rock should rest on two rocks in the layer below, with at least a 3 <br /> point bearing. The lowest boulder should be embedded at least 1 foot <br /> below final exterior grade . The base width to height ratio of the <br /> boulders should be at least 0 . 28 or wider (for example, a 9 foot <br /> high wall should have a base width of at least 2 . 5 feet) . <br /> Limestone Slab Wall <br /> We have included a representative cross-section of the limestone <br /> slab wall with this report . This section shows the wall at its <br /> highest point along the west side of the cul-de-sac . We assume that <br /> the individual limestone slabs would have front to back widths of <br /> 1 . 5 to 2 feet and each slab would have a unit weight of 150 pounds <br /> per cubic foot . The slabs should consist of hard durable limestone <br /> with rough cut sides . We assume that each limestone slab would have <br /> a thickness of 6 to 8 inches . <br /> GME CONSULTANTS.INC. <br />