ATRA Accessories
3Pages

ATRA® ACCESSORIES OVERVIEW The ATRA® Stake Clip The ATRA® Stake Clip, illustrated in Figure 1, is a molded, high-strength polymeric device developed by Presto Geosystems. The ATRA Stake Clip is used on stakes to form the ATRA® Anchor as illustrated in Figure 2. The ATRA Stake Clip provides time and material savings during the installation of the Presto Geoweb system. The ATRA® Clip is available in two styles:  For Metric applications to fit 10-12 mm diameter rods Figure 1 ATRA® Stake Clip Figure 2 ATRA® Anchor The ATRA® Anchor System ATRA® Anchors provide additional anchorage and resistance to sliding and/or uplift forces to the Geoweb section with or without tendons for crest, toe and internal anchoring. Both metal (common rebar) and non-metallic stakes may be selected based on site soil conditions. If long-term durability is desired in corrosive environments, the sand coated, Glass Fiber Reinforced Polymer (GFRP) stake is the recommended material rather than more costly corrosion-resistant coatings over steel. Presto Geosystems provides pre-assembled ATRA GFRP Anchors in a variety of anchor lengths. Benefits of ATRA Anchors vs. J-Hooks: 1) Cost Savings: J-Hooks require 20%-25% more stake material for the bend (the ‘J’ end) plus bending expense. This cost can be substantial when larger quantities of stakes are required. Easier and Faster to Drive: J-Hook anchors are very difficult to drive in harder soils. Driving against the bend of the J-Hook, which is off the major axis of the stake, will result in bending of the stake. The ATRA anchor’s flat top is an ideal surface for driving over the center of gravity. Makes a More Secure Connection with the Geoweb Cell Wall: The “arm” of the ATRA Anchor fits securely over the Geoweb cell wall. The J-Hook bend does not make a secure connection with the Geoweb cell wall. Allows Use of a Pneumatic ATRA® Driver: The ATRA Driver can drive anchors in a fraction of the time of hand hammering, reducing worker fatigue, stress and injury. This is especially beneficial when driving a large quantity of anchors. Options for driving the ATRA Anchors are either by hand (hammer) or with electric driving tools as illustrated in Figures 3 and 4. Figure 3 Driving the ATRA Anchor with a Hammer Figure 4 Driving the ATRA Anchor with an Electric Driver PRESTO GEOSYSTEMS 670 N PERKINS STREET, APPLETON, WISCONSIN, USA 54914 Ph: 920-738-1707 or 800-548-3424 ■ Fax: 920-738-1222 E-mail: info@prestogeo.com www.prestogeo.com/ ATRA-OV 1-APR 2013

ATRA® ACCESSORIES OVERVIEW The ATRA® Anchor Installation Making the ATRA® Anchor The ATRA Stake Clip installs easily on the end of a stake to form the ATRA Anchor. The stake can be a #4 metal rebar or 10-12 mm diameter rod that is cut-to-length to meet the needs of the application. The ATRA Anchor is made by simply tapping the ATRA Stake Clip onto the stake. When properly seated, the end of the stake should be flush with, to within 3 mm (1/8 in) of the top of the ATRA Stake Clip. Using the ATRA® Anchor with Geoweb sections The ATRA Anchor can directly hold Geoweb sections down as...

ATRA® ACCESSORIES OVERVIEW The ATRA® Tendon Clip for Load Transfer ATRA® Tendon Clips are load transfer devices that transfer slope gravity forces from the Geoweb cell wall to the tendon. See Figure 8 and 9. Specify ATRA Tendon Clips to gain the advantages: ATRA Tendon Clips connect and “lock” securely through the Geoweb cell wall slots allowing for preassembly at the top of slope, reducing worker strain and speeding installation. The tendon loop is much easier to complete with the ATRA Tendon Clip, ensuring the tendon remains tightly wrapped. The ATRA Tendon Clip’s strong design reduces by...