Demolition sequence for old signage: power first, then panels, followed by the frame.

Demolition sequence for old signage: power first, then panels, followed by the frame.

The sequence of dismantling is the sequence of safety. Changing storefronts is more demanding than installing new ones: old wiring with faults, rusted frames, and loose panels are hidden hazards everywhere. The demolition process boils down to one rule: power first, then panels, then frame, followed by site cleanup. The two images show a side-by-side comparison of this street—one side is rusty

拆牌的顺序,就是安全的顺序

换门头,拆旧牌比装新牌更考手艺:老线路带病、骨架锈蚀、板面松旷,处处是暗雷。招牌拆除流程顺下来就一句口诀:先电、后板、再骨架,收尾清场。配图两张正好是这条街的对照——一侧是锈蚀倾倒、砸到地面的旧门头,一侧是拆完翻新、换了新板面的门头。

勘察在先:绕楼三圈

进场前先看:墙体是什么料、锚栓扎多深、牌面下是不是人行通道、有没有邻店共用的钢架。拆除方案照勘察写,脚手架点位、警戒区围法都从这张表里来。没勘察就上手,等于闭眼开车。警戒区的围法拍照留底,发进作业群,记录本身就是安全措施。

头一步:断电

进场头一刀是电闸。旧招牌的线路常有绝缘老化、私拉乱接,不断电就动板面,触电的风险高过坠物。做法是断回路、挂牌上锁、验电笔复测;发光字电源箱里的电容放完电再拆。找不到闸的,从电表箱逐级倒查,必要时请供电部门配合断表——带电剪线是拆除现场的头号地雷。施工照明另拉临时回路,不借旧线。断电作业这一步,谁嫌麻烦谁吃亏。

第二步:拆板面

板面从上往下、从外往里:先收灯珠线路,分类盘好;再拆字面、亚克力板;后起彩钢板或铝塑板。板面轻但面积大,阵风一来就是帆——松一块、放一块,绝不整排起完再收。工人戴防割手套,板角互碰也伤人。玻璃和亚克力板拆下立放捆扎,平摞容易崩边;能回收的旧字整块卸,别砸。拆下的螺丝铆钉用磁盘收,落地扎脚,飞进人群就是事故。

第三步:切骨架

骨架是重活:脚手架或高空车就位,下方拉警戒区、专人看护。高空切割按先上杆、后斜撑、再立柱的顺序走,焊点连着应力,拆错次序,整副架子突然卸力,连带墙面锚栓一起崩。动火要清场:切割火花顺墙往下飘,楼下的雨棚、广告布、垃圾桶先挪开再动弧。立柱锚栓拆完用打磨切平,别在墙上留悬头。

第四步:废料清运

拆下来的料分装:金属骨架归金属、板面与线路分开、玻璃亚克力包角,当天清走,不占街面过夜。废料清运里还有笔回收账——能用的钢材折价,混堆的运费反倒更高。

三张签字单

我们进场前要三份纸:断电确认、作业方案、现场交底,各签各的名。拆完当晚再巡一次场:墙口封没封、脚手架上有没有余料,收场收干净。拆除是短活,顺序是长理。别让旧招牌自己"掉"下来,那就不叫拆除,叫事故。




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