Sound (STC) Testing Results - BlazeFrame

Sound (STC) Testing ResultsBlazeframe profiles were tested for STC ratings in the NVLAP certified lab Western ElectroAcoustical Laboratories in two “severe” or high value STC mockups.One tested assembly was done to determine the effectiveness of using BlazeFrame profiles at thehead of wall for fire protection leaving a ½” joint open and exposed at the head of wall. Thisassembly was mocked up with the following:1) Two walls using 25ga. 3 5/8” wide stud and bottom track framing materials spaced 1”apart2) The head of wall BlazeFrame 20ga. slotted tracks with 1” fire stop material located on thelegs facing the finished sides of the assembly3) R-13 fiberglass insulation installed in the wall cavities of both framed walls4) Two layers of 5/8” Type X gypsum board installed on both sides of the assembly5) ½” exposed joint left between top of wall sheathing and overhead6) Sound caulk applied to only the vertical and bottom joints around assemblyMeasured rating was a minimum estimate of STC 62 – Report No. TL08-572ExposedJoint 1/2"BlazeFrame CompositeTrack/Fire StopR-13 InsulationGeneric 5/8" Type XGypsum Wallboard1" Gap distanceGeneric Cold FormedSteel Stud

A second tested assembly was measured to determine the effectiveness of using BlazeFrame RCTand RCB profiles at the top and bottom respectively of the wall assembly leaving ½” gaps openand exposed at both top and bottom of wall. This assembly was mocked up with the flowing:1) One single wall using 25ga. 3 5/8” wide stud2) Top track was 20ga. BlazeFrame RCT profile having slots one side and solid leg/1/2”return on opposing side with 1” fire stop material located on the legs facing the finishedsides of the assembly3) Bottom track was 20ga. BlazeFrame RCB profile having 1 ¼” legs and ½” return on oneside with 1” fire stop material located on the legs facing the finished sides of theassembly4) R-13 fiberglass insulation installed in the wall cavity5) Generic resilient channel installed 24” O/C on side of wall with track extended beyondstud having ½” returns6) Two layers of 5/8” Type X gypsum board installed on side of wall opposite the RC-17) One layer of 5/8” Type X gypsum board installed over and attached to the RC17) ½” exposed joint left between top of wall sheathing and overhead8) ½” exposed joint left between bottom of wall sheathing and floor9) Sound caulk applied to the vertical joints onlyMeasured rating was STC 52 – Report No. TL08-574RCT (Top Track RC-1 Wall)RCB (Bottom Track RC-1 Wall)

Fire Rated Wall Assembly Detail (RC-1 Sound Wall)Exposed Joint 1/2"BlazeFrame CompositeRCT Track/Fire Stop5/8" Type XGypsum WallboardResilient Channel1/2" distance fromstud to drywallCold FormedSteel StudR-13 FiberglassInsulationBlazeFrame CompositeRCB Track/Fire StopExposed Joint 1/2"