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Installation Instructions for Snap Seal Inclinometer Casing <br /> Zb- <br /> I ---- <br /> --------------------------- ----- --- <br /> FULLY EXTENDED <br /> Talesooping Telmooping <br /> Sedlon Section <br /> ia^ <br /> FULLY RETRACTED <br /> Figure 4—RST Snap Seal Telescoping Section <br /> 6 Installing Snap Seal Casing <br /> 6.1 Installation Notes <br /> Casing Storage <br /> Casing should be stored horizontally and supported evenly so that it does not warp or bend. Whenever <br /> possible, casing should be stored in the shade since prolonged exposure to the heat of direct sunlight <br /> can cause deformation. <br /> The Borehole <br /> Drill the borehole as vertical as possible, preferably within 1 degree. Flush the borehole clean, and verify <br /> that the borehole is fully open to the bottom. Check the depth of the borehole before you begin installing <br /> the casing. Also consider that grout valves or external weights may be required for deeper boreholes. <br /> Groove Alignment <br /> It is important to have one set of grooves oriented down slope, in the direction of expected movement. If <br /> the direction cannot be determined, orient North/South. Alignment must be maintained throughout <br /> the installation, to avoid introducing torsion to the casing,thereby causing spiraling of the <br /> grooves. Never push the casing from the top or twist the casing during installation. <br /> Groove Direction of Expected <br /> Alignment Movement <br /> <--------------------> i]❑ <br /> Figure 5—Groove Alignment <br /> 9 <br />