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Installation Instructions for Snap Seal Inclinometer Casing <br /> 5.4 Installing the Top Cap <br /> After all the inclinometer sections have been installed, place a Top Slip Cap over the last piece of casing <br /> when finished and/or not in use. Do not cement into place. The cap is provided as a removable <br /> protective cover(Figure 3). <br /> TOP SLIP CAP <br /> LAST PIECE <br /> F PIPE <br /> Figure 3—Top Cap <br /> 5.5 Assembling Telescopic Sections <br /> Each telescoping section is 2ft. (24") in length and allows for six inches of compression or extension <br /> (Figure 4). Settlement sections may be inserted extended or collapsed, to accommodate the expected <br /> settlement/rebound. Typically, sections are shipped in the fully extended condition to accommodate <br /> settlement in the borehole. However, sections can be ordered in any configuration, depending on the site <br /> specific requirements. The telescopic section is equipped with Snap Seal ends, thus allowing it to be <br /> installed similar to a standard piece of casing (section 5.3). <br /> If the telescoping sections are equipped with settlement rings, then lower the sensor into the casing and <br /> record the initial readings for each settlement ring. Contact RST Instruments Ltd for more information on <br /> Settlement Monitoring Systems. <br /> The moving joint of the section is sealed by two 0-rings(one at either end). Each telescoping section <br /> contains four set-screws two on each side(Figure 4), which are individually sealed with 0-rings These <br /> screws are set in tracks which are blocked by a small web of ABS material. When sufficient force, <br /> >200lbs, is exerted on the casing (very small in a geotechnical setting), the material will break allowing <br /> the casing to compress (or extend). This design allows the telescopic section to bear the weight of the <br /> casing above it, and collapse under the force of ground settlement and/or rebound. <br /> To prevent mis-tracking of the inclinometer probe as it passes through the telescoping section, the end of <br /> the grooves have a tapered W-notch". This notch ensures that the wheels of the probe re-establish <br /> themselves in the correct track. <br /> 8 <br />