means of suitable fasteners as described previously this allows the stabilizer bars 36 and 38 to extend downwardly into the top open ends of the respective channels 24 and 22 as illustrated in fig4 initially the relative spacing shown on the left hand side of the broken line in fig4 shows the orientation of the various parts of the assembly a suitable surface such as drywall 68 is applied to the left hand side of the stud to form the surface of the wall defined by a row of studs such as the stud shown in fig4 as shown the drywall 68 is attached by means of suitable fasteners 70 and it is readily apparent that the fasteners 70 completely clear the receiver channels 22 and 24 without any interference similarly drywall 72 is attached to the right hand side to provide for a suitable sound and fire barrier additional strips of drywall such as the drywall strips 62 and 64 shown on opposite sides of the stud are attached to the flanges 46 and 48 by means of suitable fasteners such as the fasteners 66 shown in the left hand portion of fig4 these drywall strips slidably overlap the corresponding drywall sheets 68 and 72 as illustrated in fig4 to permit relative vertical movement between the sheets 62 and 68 and the sheets 64 and 72 it should be noted that the spacing between the flanges 42 46 and the flanges 44 48 is selected to permit a snug overlapping relationship between the drywall segments 62 68 and 64 72 reference now should be made to the.