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連牆器

 Aka 拉掹





建造業總工會安全顧問李光昇在港台節目表示，估計事故原因只有一個，料為懸空棚架的連牆器（俗稱「拉掹」）不穩。他相信搭棚師傅有使用足夠的連牆器，不然師傅搭棚時亦有機會墜下，但完成後交給下一個工序的分判商時，該些連牆器或阻礙其工作，部分人或不以為意「拆咗佢先」。他解釋指，連牆器一般為連接樓宇結構及竹的鐵線，但由於連牆器安裝在牆上，而玻璃幕牆亦需要安裝於牆上，某些連牆器位置或令玻璃無法安裝。

他指根據勞工處指引，每隔4米乘7米必須至少有一條「拉掹」，李光昇指棚架面積相當大，認為不止有一條「拉掹」，而新大廈一般會預留直徑6mm連接位，以使用軟鐵計算，受力可達一噸，「相信今次解得好多（「拉掹」）」。他以涉及的棚架約15米乘8米計算，垂直計算已需4至5條，橫向則至少有3條，故應有10多條「拉掹」。李光昇續指，相信「（「拉掹」）已經甩得七七八八，唔係無理由會跌咗落嚟」，指棚架重量只有每平方米約200至300磅，有理由懷疑「仲有幾多條『拉掹』喺外牆」。

Reference 

Inmediahk


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