Figure 1-5.—Methods of sill fastening to foundations.Figure 1-6.—Spacing of anchor bolts.install the washers and nuts. As the nuts are tightened,make sure the sills are properly aligned. Also, check thedistance from the edge of the foundation wall. The sillmust be level and straight. Low spots can be shimmiedwith wooden wedges, but it is better to use grout ormortar.FASTENING TO FOUNDATION WALLSWood sills are fastened to masonry walls by1/2-inch anchor bolts. These bolts, also known as j-boltsbecause of their shape, should be embedded 15 inchesor more into the wall in unreinforced concrete (fig. 1-5,view A) and a minimum of 7 inches into reinforcedconcrete (view B). The length of the anchor bolt is foundin the specifications; the spacing and location of thebolts are shown on the drawings. If this information isnot available, anchor bolt spacing should not exceed 6feet on center (OC). Also, a bolt must be placed within1 foot of the ends of each piece (as shown in fig. 1-6).There are alternative ways to fasten sill plates tofoundations. Location and building codes will dictatewhich to use. Always consult the job specificationsbefore proceeding with construction.1-3
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