BELLEVUE, WA-Five days after a 210-foot construction crane fell here, damaging three adjacent buildings and killing a Microsoft lawyer in his apartment, there is no definitive word on when work might restart on Tower 333, the 20-story office building the crane was helping erect. Hines, the developer, isn’t making any guesses, and the estimates from government officials range from two weeks to two months.

Most cranes are typically bolted deep into a building’s concrete foundation. The crane that fell Thursday was bolted to a custom-made base of steel beams. Northwest Tower Crane Service, which installed the crane, told a local newspaper this week that it had never before installed a crane in such a fashion. The base was designed by the project’s general contractor, Seattle-based Lease Crutcher Lewis.

State investigators now are studying the construction of the custom-made base. The crane collapsed after dozens of bolts and welds ripped or sheared from the base. Some have speculated that the crane’s connection to the base may have been weakened by high winds last week.

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