Safety Assessment Program Evaluator Student Manual

CA Emergency Mgmt. Agency Safety Assessment Program Evaluator Manual April 2011Figure 6-1 shows a home with substantial roof damage. This is one of the more common types ofdamage from wind to one- or two-story residences. With the roof missing, there has also beendamage to the interior from rain.There has been a great deal of damage to both the lateral and vertical load resistance systems inthe residence. Since aftershocks are not a consideration in this case, and since there may not beanother storm system to stress the building further, a likely posting for this building would beRESTRICTED USE to allow for possession retrieval and repairs. If there is a falling hazard inthe building, then those areas with the falling hazard could be restricted from all use until thefalling hazard is dealt with.Figure 6-2 shows a hurricane damaged prefab warehouse where the wind blew out the sheetmetal exterior wall. In some structures, this could have lead to a collapse or partial collapse ofthe structure. However, these light steel-framed buildings use moment frames to resist many ofthe lateral forces (X-brace tension bars carry the rest of the lateral forces), so this sort of damageto this structure should not pose a significant hazard to occupants. This building could be postedRESTRICTED USE for possession retrieval, cleanup and repairs.Figure 6-3 shows a reinforced concrete column that suffered some flexure damage due to thehigh winds of Hurricane Katrina. It is easy to see from this photo that taller buildings withoutsufficient steel reinforcing could be severely damaged in such storms.Figure 6-4 shows a wood frame house where the back end and part of the roof was torn off byHurricane Katrina. The wall of the house is noticeably leaning, indicating that the house is nolonger stable.Photo courtesy Raymond Lui, SEAFigure 6-3 - Damaged concrete column, 2005 Hurricane Katrina188