I.S. 89:1958

1 SCOPE
2 TYPES OF SILLS
3 PLACING OF SILLS
4 DIMENSIONS
5 TOLERANCES
6 SEATINGS
7 JOINTING
8 INSERTS FOR FIXING
9 MATERIALS FOR CAST CONCRETE
10 MANUFACTURE OF CAST CONCRETE SILLS
11 REINFORCEMENT
12 WATER ABSORPTION
13 NATURAL STONE SILLS
14 SAMPLING
15 MANUFACTURER'S CERTIFICATE
16 COST OF TESTS
APPENDIX A - METHOD OF TEST FOR WATER ABSORPTION OF
             CAST CONCRETE SILLS
APPENDIX B - METHOD OF TEST FOR MODULUS OF RUPTURE OF
             STONE SILLS

Outlines cast concrete and natural stone sills for use with steel and wood casement windows. Also includes provisions for sampling, manufacturer's certificate and cost of tests.