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Figure 1.14 Tie-Down System It should be emphasized that conventional in- stallation described above would rarely be ade- quate for resisting the flood forces that can be ex- pected in areas prone to flooding, A manufactured home that is elevated a few feet above the ground and anchored to resist wind forces will still be vulnerable to the additional forces produced by flooding. Movement of the home from the foun- dation supports, inundation, or both can result in major damage, as shown in Figure 1,15, Figure 1.15 Movement From Foundation Even relatively minor inundation can cause significant damage to a manufactured home as shown in Figure 1,16, For example, a water level of only two feet above the floor can potentially cause damage equivalent to approximately 80 per- cent of the value of the home, In flood hazard areas, additional elevation and flood and wind load considerations may necessitate a siting technique that varies substan- tially from conventional installation methods, Figure 1.16 Inundation Damage Depending upon the characteristics of the flooding anticipated, the home may be elevated using piers, posts, pilings, or fill. The use of an elevated foundation will differ from a normal siting techni, que in terms of the desired height above grade and the structural capacity of the elevating system to withstand anticipated flood and wind loads, Figures 1,17 and 1,18 show elevating techniques, Figure 1.17 Elevation Using Fill 7