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Sound Transmission Class for Masonry Walls

Sound Transmission Class for Masonry Walls. Standard Method for Determining the Sound Transmission Class Rating for Masonry Walls (TMS 0302). TMS 0302. 1.0 Scope 2.0 Referenced Standards 3.0 Notations 4.0 Definitions 5.0 Materials 6.0 Construction 7.0 Quality Assurance

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Sound Transmission Class for Masonry Walls

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  1. Sound Transmission Class for Masonry Walls

  2. Standard Method for Determining the Sound Transmission Class Rating for Masonry Walls(TMS 0302)

  3. TMS 0302 • 1.0 Scope • 2.0 Referenced Standards • 3.0 Notations • 4.0 Definitions • 5.0 Materials • 6.0 Construction • 7.0 Quality Assurance • 8.0 Sound Transmission Class (STC) Rating

  4. TMS 03021.0 SCOPE • Minimum requirements for STC • Field or laboratory standard test methods, or • Calculation procedure

  5. TMS 03024.0 DEFINITIONS • Sound Transmission Class, STC • Single number rating – ASTM E413

  6. TMS 03025.1 MASONRY UNITS • Shall comply with the following ASTM standards: • C34, C55, C56, C62, C73, C90, C126, C129, C212, C216, C652, or C744

  7. TMS 03025.2 MORTAR • Shall comply with ASTM C270

  8. TMS 03025.3 GROUT • Shall comply with ASTM C476

  9. TMS 03026.0 CONSTRUCTION • Shall conform to the requirements: • General building code • Standard

  10. TMS 0302 6.1 PLACING MORTAR AND MASONRY UNITS • Hollow units – face shell mortared head and bed joints • Solid units – full mortared head and bed joints

  11. TMS 03026.2.1 SEALING OPENINGS AND JOINTS • Completely seal through-wall openings. • Prior to sealing fill gaps with: • Foam • Cellulose fiber • Glass fiber • Ceramic fiber • Mineral wool

  12. TMS 03026.2.2 SEALING OPENINGS AND JOINTS • Completely seal partial-wall penetration openings and inserts.

  13. TMS 03026.2.3 SEALING OPENINGS AND JOINTS • Seal the following w/elastomeric joint sealants (ASTM C920): • Control joints • Expansion joints • Top of walls and roof • Roof assemblies

  14. TMS 03026.2.3 SEALING OPENINGS AND JOINTS • Fill joint space behind sealant with: • Mortar • Grout • Foam • Cellulose fiber • Glass fiber • Mineral wool

  15. TMS 0302 (Commentary)FIG. 6.2.1 ACOUSTICAL LEAKS

  16. TMS 0302 (Commentary)FIG. 6.2.2 SEALING AROUND PENETRATIONS AND FIXTURES

  17. TMS 03028.0 SOUND TRANSMISSION CLASS RATING • Determine in accordance with: • 8.1 Laboratory testing – ASTM E 90 • 8.2 Field testing – ASTM E413 • 8.3 Calculation

  18. TMS 03028.3 CALCULATION • For walls greater than 3 inches • STC = 0.18W + 40 (Eq.1) • W = Wall Weight, psf

  19. TMS 0302 (Commentary)

  20. TMS 0302 (Commentary)FIG 8.3-1 WALL WEIGHT VS. STC

  21. TMS 0302TABLE 8.3-1

  22. TMS 0302 (Commentary)TABLE 8.3-2 – CALCULATED STC RATINGS FOR CONCRETE MASONRY WALLS

  23. EXAMPLE • Given: • W = wall weight = 41 psf • STC = 0.18W + 40 • STC = 0.18(41) + 40 • STC = 47.4

  24. NCMA TEK 13-2

  25. NCMA TEK 13-2

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