hollowcore; ASTC; precast concrete; CPCI; sound transmission class
This report includes ten examples of calculations of the ASTC ratings for constructions consisting of bare concrete masonry walls connected to bare 203 mm (8") precast concrete hollowcore floors. Examples using concrete hollowcore slabs of three different mass per unit areas are presented (269 kg/m2, 301 kg/m2 and 338 kg/m2 without grout or 273 kg/m2, 305 kg/m2 and 344 kg/m2, respectively with grout). The ASTC rating is also calculated for the addition of linings on the floor of 301 kg/m2 concrete hollowcore slabs. The examples using the detailed method show that constructions of bare (no liners, unpainted) normal weight 190 mm thick hollow concrete block masonry walls connected to bare 203 mm (8”) thick precast/prestressed concrete hollowcore slabs can achieve an ASTC rating of at least 47. Based on the findings from this study, it is expected that constructions of hollow concrete block masonry walls with a mass per unit area of or greater to 238 kg/m2 connected to precast concrete hollowcore floors with a mass per unit area equal to or greater than 273 kg/m2 (with grout) will achieve ASTC ratings which are equal to or greater than 47.
National Research Council of Canada. Construction
Client Report (National Research Council of Canada. Construction), no. A1-012467.1 (28 March 2018).
On the title page: Canadian Precast/Prestressed Concrete Institute