翻訳と辞書 Words near each other ・ Trench Cup ・ Trench Davis ・ Trench drain ・ Trench effect ・ Trench fever ・ Trench foot ・ Trench Glacier ・ Trench Green ・ Trench knife ・ Trench map ・ Trench raiding ・ Trench raiding club ・ Trench railways ・ Trench rescue ・ Trench Road ・ Trench shield ・ Trench shoring ・ Trench trophy ・ Trench warfare ・ Trench watch ・ Trench Wood ・ Trench, Telford ・ Trenchard (disambiguation) ・ Trenchard Cox ・ Trenchard More ・ Trenchard Museum ・ Trenchardism ・ Trenchcoat (film) ・ Trenchcoat in Paradise ・ Trenchcoat Robbers Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Trench shield ： ウィキペディア英語版 Trench shield Trench shields (also called Trench Boxes) are steel or aluminum structures used for protecting utility workers while performing their duties within a trench. They are customarily constructed with sidewalls of varying thicknesses held apart by steel or aluminum spreaders. Spreaders can be interchanged to match the width of the trench. The different materials and building designs lead to a variety of depth ratings, i.e. the depth of a trench that the shield can withstand a collapse without buckling. Depth ratings are determined by registered professional engineers. A shield should not be confused with a shore. While they may serve the same function, trench shoring is a different physical application that holds up the walls of a trench to prevent collapse. In the US, use of a trench shield is governed by OSHA 29 CFR Part 1926.650-.652 Subpart P-Excavations ==External links== * (National Utility Contractors Association ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Trench shield」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.