圖：
＊ 其實，同類型嘅工作，最好係有Location plan ga, 係為左比人知道工地位置嘅情報，如果地圖範圍太大，可考慮用1:5000的圖則(我未用過)，如果冇，亦可考慮直接去MyMapHK capture 想要嘅地圖scale， 否則，出車前，如果對地方本身唔係熟悉嘅話，都係要整張location plan 去知道點樣用最少路線行哂所有位置。 又可以比判頭佑道位置與位置間的距離，訂定工程順序。
工料
＊ 應該係岩嘅:唔夠6mm厚嘅鐵板唔好用6m thick 焊支，否則會辣熔鐵板或損害結構。(有Ｄstruct E話係，但唔sure 點解好多部門照寫)
＊ 膠板需要UV resistance，唔係想擋UV(咁就會冇咁光)，而係想令膠板在日曬雨淋下唔會變白，唔透明。
＊ 確保膠板質量果度，咁當然Delivery note 同物料spec，並在信中聲明所有所用物料係跟spec 同delivery note 啦， 但其實我覺得如果要監控，各區或總部最好買一個UV resistance 嘅 polythene carbonate catalogue，講哂每一種物料嘅型號，spec，同埋sample，唔駛次次攞。咁就可以出去果陣對貼紙同埋對塊膠板喇。
＊ 超聲波探測器係需要調較到音速5900m/s^-1 for steel 嘅，唔知會唔會有人無留意到，其實我唔太sure 厚度準唔準，但佢cal cert 話佢好準...
就算準，超聲波呢類機，部機設計應該用彈弓頭，確保每一面都受力平均，否則好多時，
按壓得較輕或較斜就會較厚，其實呢個工程質量問題一直存在。
(Ultrasound detector should design an elastic detector head, to ensure that the compressing stress of the detector head is uniform. Or it is a problem for long that when detector head is lightly separate or inclined to the metal surface, the thickness of the metal would be changed. And supplier generally supplies metal with 1-2mm thinner showing that the technical nowadays can make a metal plate to the 1mm accuracy.
＊ 展示finish floor level 要好好咁考慮，係咪個個都係咁，有冇Ｄ唔想要石矢面，想要paving block 面。
＊ 可能最好係notes 度加一句： post would be moved horizontally on site, and have a footing with mininum cover of 100 mm. When the cover of the post is smaller tham 200mm, U steel bar should be added at 200c-c at that 3 sides horizontally and 1 side vertically. 咁移動footing 時就會有根據。
＊ 要鎖嘅地方最好即刻上鎖， 或包住， 否則會比d陌生人自已加個鎖上去。。。
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