244 Section 2 Foundations and Framing Figure 10-20 is a map of the United States that identifies various levels of termite infesta- tion. Canada and Alaska are considered to be in region IV. Hawaii and Puerto Rico are in region I. In areas where termite damage is great, additional measures should be taken. Sometimes it is neces- sary to use chemically-treated lumber for lower framing members. Also, the soil around the foun- dation and under the structure can be treated. 10.3.2 Installing Sills Figure 10-21 shows two types of sill anchor–– anchor straps and anchor bolts. With straps, posi- tion the sill and attach the straps with nails. Some types must be bent over the top of the sill. Others are nailed on the sides. Sill Metal shield on foundation wall Metal shield on pipes and columns Goodheart-Willcox Publisher Figure 10-19. Termite shields. Use galvanized sheet steel or other suitable metal that resists rusting. Region I – very heavy Region II – moderate to heavy Region III – slight to moderate Region IV – moderate to none Note: Lines defining areas are approximate only. See local FHA Office for specific areas. Local conditions may be more or less severe than indicated by the region classification. FL NM DE MD TX OK KS NE SD ND MT WY CO UT ID AZ NV WA CA OR KY NY PA MI VT NH ME MA RI CT WV VA OH IN IL NC TN SC AL MS AR LA MO IA MN WI NJ GA Forest Products Laboratory Figure 10-20. Nearly all parts of the United States have some risk of termite infestation. Termites can damage buildings. Copyright Goodheart-Willcox Co., Inc.