Building officials of Miami-Dade County suspect deferred maintenance rather than weak building codes or an inadequate 40-year recertification process required by the county was the likely reason for the June 24 building failure in Surfside, Fla. The partial collapse of the 40-year-old Champlain Towers South residential condominium caused at least 98 fatalities.

The collapse of the 12-story condo is a tragic case that is “blowing everything out of proportion,” says Fredy Tain, structural division director in the Department of Regulatory and Economic Resources (RER) of Miami-Dade County.

Though the cause or causes of the Surfside debacle remain unknown, Jaime D. Gascon, director of RER’s board and code administration division, says that “at this time, there has been nothing identified as deficient in the building codes that would have caused” the failure.

Gascon认为不良的维护在悲剧中发挥了作用。他说，法规要求建筑物的所有者维护财产，但由于成本和其他因素，许多人都会推迟维护。新利18备用官网登录

在尚普兰塔塔斯（Champlain Towers South Fiasco）之后，迈阿密戴德县（Miami-Dade County）35个司法管辖区的建筑官员正在合作审查重新认证过程，以查看是否可以改善它，包括40年的时间范围是否足够。泰恩说：“我们正走向完美之路。”

Miami-Dade County and neighboring Broward County are the only two places in the U.S. that require recertification, say Miami-Dade officials. Tain asserts the process works well. “Over the years, a lot of failures have been avoided because of the 40-year recertification,” he says.

Tain没有提供特定的历史案例，解释了需要进行大量研究工作。但在6月24日的悲剧中，他的部门刚刚完成了对未成立的迈阿密戴德县41座多户建筑物（四个故事或更高）的外观的视觉审核，无论是经历或在重新认证时。审计没有严重的结构性问题，除了钢柱恶化，支撑着两个四层楼的皇家橡树公寓的封闭角阳台。泰恩说，问题是在观察到的第二天解决的。

此外，在对62栋多户家庭建筑物的视觉检查中，由于新的重新认证通知在7月初邮寄的四个故事或更高的高度，RER没有发现任何可能导致撤离的问题。

RER还正在审查未决的重新认证，以确保财产所有人采取适当的步骤来纠正所需工程师审计中确定的缺陷。

碎片移动了

At the collapse site, the remaining unstable wing of the structural-concrete building was imploded on July 4. As of July 21, debris and rubble had been moved from the site, to a warehouse or a lot elsewhere.

The National Institute of Standards and Technology (NIST), which is leading a probe of the collapse, reports having identified, marked and tagged electronically more than 200 concrete building elements, including pieces of columns, beams and slabs.

在清除站点之前，遥感确定了瓦砾中证据的位置。为此，调查人员使用了可创建一种数字地图的光检测和范围技术，称为LIDAR。技术人员每天从北部和南部的邻近建筑物上的阳台上进行每天的高分辨率激光扫描。延时摄像机还记录了不断变化的场景。

Working with the Rapid Response Research Facility of the National Science Foundation’s Natural Hazards Engineering Research Infrastructure Program, NIST has installed accelerometers to measure building vibrations and a seismometer to measure ground vibrations at the 12-story Champlain Towers North condominium, which is a near twin of the south tower. The data will be used to validate computer modeling of Champlain Towers South, says NIST, not to evaluate the condition of the north tower.

NIST还在组装的过程中其National Construction Safety Act team that will lead the technical phase of the investigation. No names have been announced. “One of the conditions we have to consider before launching [a technical] investigation is if funds are available,” says Jennifer L. Huergo, a NIST spokesperson.