9/16/2023 0 Comments House with breakaway walls![]() ![]() ![]() The floors are conventional wood, as was the window bucking. Lackey feels this leads to a stronger structure.īelongings on the ground floor, including the breakaway walls-visible in above photo taken before the hurricane-were swept away by the storm surge, but damage was minimal compared to other beachfront properties (below). The home was designed so that all jogs in the walls are at least 24 inches long, and windows and doors are set back at Reinforcing steel in these beams extends directly into the ICF walls to tie the entire structure together. These columns are tied together at the top with reinforced concrete bond beams. The entire house was elevated on columns, with sacrificial “breakaway” walls on the ground floor to allow a storm surge to pass underneath it. “We just never knew we’d find the big one so fast.” “We wanted to build it for the big one,” Lackey told the Times. While local building codes require homes to withstand 120 mph winds, the Sand Palace was designed to withstand winds of 240 mph. The foundation sits on concrete piles driven 28 feet into the ground, significantly deeper than required. Virtually all aspects of the home were built to exceed code. “It’s like being able to strap your roof directly to the foundation,” says Lackey. Like all ICF homes, the walls consist of a reinforced concrete core sandwiched between rigid EPS foam insulation panels, providing excellent strength and energy efficiency. When compared to traditional wood frame walls that offer only soft batt insulation and a wood frame, the strength and safety you get with Nudura is far superior.” “They provide greater impact resistance and will withstand winds of up to 402 kph. “Nudura insulated concrete wall systems are designed to withstand Mother Nature’s worst,” says Todd Blyth, senior director of sales and marketing. Completed by the owners in April 2018, the house is used as a vacation rental when the owners are not staying there themselves. They found a local Florida contractor with ICF experience, and agreed with his recommendation to use Nudura-brand ICF. “As we explored it further, we discovered ICF,” he says. They looked at a number of options, even concrete domes, but wanted something that looked conventional. Lackey says that from the beginning, they wanted to build a disaster-resistant, concrete home. The home is owned by Russell King and his nephew Lebron Lackey. A few reporters took the time to mention that it was built with Insulated Concrete Forms (ICFs), and this construction method was one major factor that allowed it to survive the hurricane while the rest of the neighborhood was destroyed. Can I design the stud wall to fail under 1.The ICF “Sand Palace” (above) survived hurricane winds and storm surge with minimal damage compared to neighboring structures (below) which were reduced to ruins.Ĭoverage in the media emphasized that the home was built with reinforced concrete. However, wall needs to fail at a maximum of 20psf unless certified by an engineer or architect under the following conditions:ġ) Breakaway wall collapse shall result from a water load less than that which would occur during the base flood.Ģ) The elevated portion of the building and supporting foundation system shall not be subjected to collapse, displacement, or other structural damage due to the effects of wind and water loads acting simultaneously on all building components (structural and non structural).īecause the wind loads are greater than 20 psf I have to certify the wall will fail under the above conditions. I know I need them because the building is located in a V zone. I am a little confused with the requirements for breakaway walls. The second floor of this facility is located well above the flood elevation (23' off the slab on grade). This particular structure will house a facility that manufacturers/repairs boats. ![]() The elevation of the SOG is at 7.5' meaning our structure will be 9'-6" below water when the design flood occurs. The building is located in a V16 zone with a BFE (Base Flood Elevation) = 17'. I have never had to deal with these requirements before and I find them a little confusing. It seemed simple enough at the time until our client informed us that we had to certify that the building was in compliance with ASCE 24 "Flood Resistant Design and Construction". We were recently contracted to design a foundation for a metal building. ![]()
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