Somme familiers are dissatisfied with the speed with which the search and rescue efforts in the Florida building collapse.  Some relatives...
Somme familiers are dissatisfied with the speed with which the search and rescue efforts in the Florida building collapse.

Some relatives of those who are still missing after a residential building collapsed in South Florida have become impatient as officials encourage patience during the slow, laborious rescue attempts, which are expected to last for days.
On Saturday, a mother expressed her concern for her 26-year-old daughter, who was reported missing following a partial building collapse in Surfside, Florida, and pleaded with officials to do more.
"I'm a mother of two children. I'm not sure what the best course of action is... Consider what would happen if your children were present "As state and local officials visited with the relatives of those who went missing after the fall, the mother told them what happened.
As they race to save a life, rescuers must contend with flames, noise, and moving steel and concrete.
As they race to save a life, rescuers must contend with flames, noise, and moving steel and concrete.
In an emotional video uploaded on Instagram on Saturday, she said, "I know you're doing everything you can, but it's not enough."
Families of the scores of people still missing after a condo building partially collapsed a few miles north of Miami Beach on Thursday are becoming impatient, hoping for speedier results from the search and rescue workers sifting through the wreckage around the clock.
Sarina Patel, who has three family members missing as a result of the collapse, told CNN that while she appreciates the search and rescue efforts, her family is "antsy."
"We're hanging in there, trying to be strong, hoping for a miracle, but getting anxious with the lack of developments today," she added Saturday.
"As the crew works through the rubble, we were expecting for some more news by now, but we are forever thankful for their relentless efforts," Patel added.
As of Saturday, Patel's uncle, his wife, and their daughter were still missing.
The death toll increased to five on Saturday, up from four on Friday.
This is what we know about the people who went missing as a result of the Miami condo collapse.
Source
What is the cause of building collapse?
The report states that "the waterproofing under the pool deck and inlet drive as well as all planter pond waterproofing materials are beyond their useful life and must therefore be completely removed and replaced."
"Failure of waterproofing causes significant structural damage to the concrete structural slab below these areas. Failure to replace the waterproofing in the near future will greatly expand the extent of concrete deterioration," the survey continued.
The report said the waterproofing was placed on a flat structure rather than a sloping concrete slab that would have allowed water to drain. This resulted in the water remaining on the waterproofing until it evaporated, which the report identified as a "fatal mistake."
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