| 摘要 |
<p>PROBLEM TO BE SOLVED: To facilitate installation of a crossing duct crossing main multiple ducts on the bottoms of the main multiple ducts, by forming a fitting part which is fittable to the lower end part of a duct supporting the main multiple ducts at the upper surface of a tubular duct body and detachably fitting lids on both end parts of a duct main body. SOLUTION: A duct main body 11 is formed into a tubular shape, whose length is equal to or larger than the width of a main multiple duct 2. The upper surface of the duct main body 11 is formed with a fitting part 14 on which the lower end part of a duct tie 21 supporting the main multiple duct 2 can be fitted. At the site of construction, the fitting part 14 of the duct main body 11 is fitted onto the lower end of the duct tie 21, so that they are assembled integrally to be buried, and lids are detachably fitted on both ends of the duct main body 11. It is thus possible for a crossing duct 1 to cross the main multiple duct 2 such as cables buried under a road, thereby attaining ducts for power cables, telephone lines, gas pipes, water pipes which are led into each home or building.</p> |
