An apparent miscommunication about a shop-fabricated section of a temporary hoist mast, in which the field crew assumed missing bolts were in place for final erection, was a key cause behind a tragic accident that killed a New Hampshire ironworker and seriously injured another worker last year, according to a report by federal safety officials obtained by ENR.
The accident took place June 11th，2015年，在马萨诸塞州萨默维尔的一个办公室建筑工作地点，去年合同团队在这座13层的建筑物上工作。当一只桅杆失败时，船员将桅杆延伸到两个外部的并排人员和物质提升器上，上面的出租车掉下来，杀死了一名工人，并严重伤害了另一名工人。
现年40岁的罗恩·莫尔斯（Ron Morse）是马萨诸塞州雷纳姆（Raynham）的Shiloh钢竖井的铁工领班，当时它从建筑物的三楼位置掉下来。他进入心脏骤停，后来在波士顿的马萨诸塞州综合医院去世。
30岁的马克·普拉茨（Mark Praetsch）是马萨诸塞州布伦特里（Braintree）的自由设备和供应雇用的学徒，也在吊车中，受到了严重伤害。
Another Liberty employee was struck by the mast or cab, which also narrowly missed Liberty’s assistant safety director, according to the OSHA report.
职业安全与卫生管理局表示，它提议对每位雇主的罚款21,000美元，因为据称未能在安装前检查提起措施组件，但未能充分指导雇员有关提升机的安全性，并且未能遵循并遵守hoist的手册。OSHA表示，Liberty对全额罚款予以罚款，Shiloh以13,500美元的价格定居。
该项目总承包商波士顿萨福克建筑公司的发言人说：“自从这一不幸和可怕事件发生以来，承包商都与OSHA合作，并重写了其提升政策，工作安全和危害分析计划。发言人说，萨福克还为自由雇员和贸易伙伴提供了培训。“我们的目标是继续加强我们所做的一切的安全心态，并确保类似的事故再也不会发生。”
How the Accident Unfolded
如报告中所述，导致事故的事件描述了导致悲剧的一些所谓错误。
On June 11, 2105, the crews were preparing to add new sections to side-by-side hoists, with Morse and Praetsch in one of the hoists and a separate two-person crew employed by Liberty and Shiloh were in the other.
根据OSHA的说法，Morse和Praetsch正在为其吊带的桅杆部分置于桅杆部分，而起重机则在钩上有第二个桅杆支架，准备焊接到结构。
Morse called out that he needed a laser level to plumb.
另一个出租车的机组人员下降了激光级别的摩尔斯。
As the second hoist cab reached grade, the mast and hoist on the other side, with Morse and Praetsch inside, “collapsed to the ground,” the report stated.
The Mast’s Missing Bolts
报告指出，现场工作人员假设在Liberty Equipment的Shop上制造的桅杆部分都有最终的连接，并准备好被操纵并放置在适当的位置。但是桅杆部分缺少两个螺栓。该报告并未显示螺栓的确切位置，但是该报告的照片显示了剪切的一个部分的末端螺栓，大概是因为缺失的螺栓没有到位。
根据the report, three different Liberty Equipment employees stated that “Liberty generally only assembles the mast sections at the shop for trucking purposes, and that it’s up to the field crew to disassemble all of the mast sections and re-bolt and torque the mast sections together utilizing new bolts and nuts.”
No extra bolts were found at the jobsite, partial confirmation that Liberty Equipment didn’t expect to complete preparation of the masts.
Liberty Equipment declined to comment on the OSHA report and officials of Shiloh Steel, which is a subsidiary of Suffolk Construction, could not be separately reached.
There is no information regarding lawsuits connected to the accident. Over a year later, Suffolk is readying the remaining unfinished floors of the new building, an administrative office for Partners Healthcare, for occupancy.
One Month After Accident
OSHA报告的最后一部分是在Somerville Journal中首次获得并报告的（单独获得照片）。新利18备用
事故发生后大约七个星期，关于工作现场工作的投诉被打电话给OSHA，抱怨不安全地竖起了提升箱。
根据OSHA, the agency dispatched an inspector to the jobsite where he or she learned that Liberty Equipment intended to “jump” a mast section on the hoist at 3 p.m.
在工作场所，OSHA检查员“观察了桅杆部分，并观察了其中一个桅杆部分中缺少两个螺栓/坚果”，这些螺栓/坚果在Liberty Equipment的商店中进行了预先分组。
