> For the complete documentation index, see [llms.txt](https://enercalc.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://enercalc.com/docs/sel-user-manual/appendices/appendix/appendix-c.md). # Appendix C - Masonry Wall Weights & Section Properties How to find masonry wall weights and section properties for concrete masonry units at various grout spacings. References: * ASTM C90-06 - Standard Specification for Loadbearing Concrete Masonry Units * NCMA TEK 14-01B - Section Properties of Concrete Masonry Walls * NCMA TEK 14-13B - Concrete Masonry Wall Weights **Weights of Masonry Walls (pcf) - Using 140 pcf Grout** | | | **Grouted Cell Spacing** | | | | | | | | | | ----------------------------------------- | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **Block Type** | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **Lightweight Block** **(105 pcf)** | **6"** | 58 | 41 | 35 | 32 | 31 | 30 | 28 | 27 | 26 | | **8"** | 78 | 55 | 47 | 43 | 40 | 39 | 36 | 35 | 34 | | | **10"** | 100 | 68 | 57 | 51 | 48 | 46 | 42 | 41 | 40 | | | **12"** | 121 | 80 | 66 | 59 | 55 | 53 | 48 | 46 | 44 | | | **14"** | 143 | 93 | 76 | 67 | 62 | 59 | 53 | 51 | 49 | | | **16"** | 164 | 105 | 85 | 76 | 70 | 66 | 59 | 56 | 54 | | | **Medium** **Weight Block** **(115 pcf)** | **6"** | 60 | 43 | 37 | 34 | 33 | 32 | 30 | 29 | 28 | | **8"** | 81 | 57 | 49 | 45 | 43 | 41 | 39 | 37 | 37 | | | **10"** | 103 | 71 | 60 | 54 | 51 | 49 | 46 | 44 | 43 | | | **12"** | 125 | 84 | 70 | 63 | 59 | 56 | 51 | 49 | 48 | | | **14"** | 147 | 96 | 80 | 71 | 66 | 63 | 57 | 54 | 53 | | | **16"** | 168 | 109 | 90 | 80 | 74 | 70 | 63 | 60 | 58 | | | **Normal** **Weight Block** **(135 pcf)** | **6"** | 64 | 47 | 41 | 39 | 37 | 36 | 34 | 33 | 32 | | **8"** | 86 | 63 | 55 | 51 | 48 | 47 | 44 | 43 | 42 | | | **10"** | 109 | 77 | 66 | 61 | 58 | 55 | 52 | 50 | 49 | | | **12"** | 132 | 90 | 77 | 70 | 66 | 63 | 58 | 56 | 55 | | | **14"** | 154 | 104 | 87 | 79 | 74 | 70 | 65 | 62 | 60 | | | **16"** | 177 | 118 | 98 | 88 | 82 | 78 | 71 | 68 | 66 | | **Weights of Masonry Walls (pcf) - Using 105 pcf Grout** | | | **Grouted Cell Spacing** | | | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **Block Type** | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **Lightweight Block** **(105 pcf)** | **6"** | 49.5 | 36.8 | 32.3 | 30.0 | 29.3 | 28.5 | 27.0 | 26.3 | 25.5 | | **8"** | 66.3 | 49.0 | 43.0 | 40.0 | 37.8 | 37.0 | 34.8 | 34.0 | 33.3 | | | **10"** | 84.0 | 59.8 | 51.5 | 47.0 | 44.8 | 43.3 | 40.3 | 39.5 | 38.8 | | | **12"** | 100.8 | 69.8 | 59.3 | 54.0 | 51.0 | 49.5 | 45.8 | 44.3 | 42.8 | | | **14"** | 118.0 | 80.3 | 67.5 | 60.8 | 57.0 | 54.8 | 50.3 | 48.8 | 47.3 | | | **16"** | 134.8 | 90.3 | 75.3 | 68.5 | 64.0 | 61.0 | 55.8 | 53.5 | 52.0 | | | **Medium** **Weight Block** **(115 pcf)** | **6"** | 51.5 | 38.8 | 34.3 | 32.0 | 31.3 | 30.5 | 29.0 | 28.3 | 27.5 | | **8"** | 69.3 | 51.0 | 45.0 | 42.0 | 40.5 | 39.0 | 37.5 | 36.0 | 36.0 | | | **10"** | 87.0 | 62.8 | 54.5 | 50.0 | 47.8 | 46.3 | 44.0 | 42.5 | 41.8 | | | **12"** | 104.5 | 73.5 | 63.0 | 57.8 | 54.8 | 52.5 | 48.8 | 47.3 | 46.5 | | | **14"** | 122.0 | 83.5 | 71.5 | 64.8 | 61.0 | 58.8 | 54.3 | 52.0 | 51.3 | | | **16"** | 138.8 | 94.3 | 80.0 | 72.5 | 68.0 | 65.0 | 59.8 | 57.5 | 56.0 | | | **Normal** **Weight Block** **(135 pcf)** | **6"** | 55.8 | 42.8 | 38.3 | 36.8 | 35.3 | 34.5 | 33.0 | 32.3 | 31.5 | | **8"** | 74.3 | 57.0 | 51.0 | 48.0 | 45.8 | 45.0 | 42.8 | 42.0 | 41.3 | | | **10"** | 93.0 | 69.0 | 60.8 | 57.0 | 54.8 | 52.5 | 50.3 | 48.8 | 48.0 | | | **12"** | 111.5 | 79.8 | 70.0 | 64.8 | 61.8 | 59.5 | 55.8 | 54.3 | 53.5 | | | **14"** | 129.3 | 91.5 | 78.8 | 72.8 | 69.0 | 66.0 | 62.3 | 60.0 | 58.5 | | | **16"** | 147.8 | 103.0 | 88.0 | 80.5 | 76.0 | 73.0 | 67.8 | 65.5 | 64.0 | | | *These wall weights were adapted from TEK 14-13B, which lists values only for 140 pcf grouted walls. The weights were derived by isolating the grout component (fully-grouted wall weight minus non-grouted wall weight), scaling that grout weight by 105 pcf / 140pcf, and adding the adjusted grout weight back to the non-grouted wall weight baseline.* | | | | | | | | | | | **Net Cross-Sectional Area of Masonry, A\*\*\*\*n** **(in2/ft)** | | **Grouted Cell Spacing** | | | | | | | | | | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **6"** | 67.5 | 46.6 | 39.1 | 35.3 | 33.0 | 31.5 | 29.0 | 27.8 | 27.0 | | **8"** | 91.5 | 62.0 | 51.3 | 46.0 | 42.8 | 40.7 | 37.1 | 35.3 | 34.3 | | **10"** | 115.5 | 74.8 | 59.8 | 52.4 | 47.9 | 44.9 | 39.9 | 37.5 | 36.0 | | **12"** | 139.5 | 87.3 | 68.2 | 58.7 | 52.9 | 49.1 | 42.7 | 39.6 | 37.6 | | **14"** | 163.5 | 99.9 | 76.6 | 64.9 | 58.0 | 53.3 | 45.5 | 41.6 | 39.3 | | **16"** | 187.5 | 112.4 | 85.0 | 71.2 | 63.0 | 57.5 | 48.3 | 43.7 | 41.0 | **Average Equivalent Solid Thickness (EST) - Mortar at Face Shells Only (in)** | | **Grouted Cell Spacing** | | | | | | | | | | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **6"** | 5.625 | 3.883 | 3.258 | 2.942 | 2.750 | 2.625 | 2.417 | 2.317 | 2.250 | | **8"** | 7.625 | 5.167 | 4.275 | 3.833 | 3.567 | 3.392 | 3.092 | 2.942 | 2.858 | | **10"** | 9.625 | 6.233 | 4.983 | 4.367 | 3.992 | 3.742 | 3.325 | 3.125 | 3.000 | | **12"** | 11.625 | 7.275 | 5.683 | 4.892 | 4.408 | 4.092 | 3.558 | 3.300 | 3.133 | | **14"** | 13.625 | 8.325 | 6.383 | 5.408 | 4.833 | 4.442 | 3.792 | 3.467 | 3.275 | | **16"** | 15.625 | 9.367 | 7.083 | 5.933 | 5.250 | 4.792 | 4.025 | 3.642 | 3.417 | **Average Equivalent Solid Thickness (EST) - Mortar at Face Shells Only (in)** | | **Grouted Cell Spacing** | | | | | | | | | | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **6"** | 5.625 | 4.108 | 3.633 | 3.392 | 3.250 | 3.158 | 3.000 | 2.917 | 2.867 | | **8"** | 7.625 | 5.483 | 4.808 | 4.475 | 4.267 | 4.133 | 3.908 | 3.800 | 3.733 | | **10"** | 9.625 | 6.733 | 5.825 | 5.367 | 5.092 | 4.908 | 4.608 | 4.458 | 4.367 | | **12"** | 11.625 | 7.917 | 6.75 | 6.175 | 5.825 | 5.592 | 5.200 | 5.008 | 4.892 | | **14"** | 13.625 | 9.108 | 7.683 | 6.975 | 6.550 | 6.267 | 5.792 | 5.558 | 5.417 | | **16"** | 15.625 | 10.292 | 8.617 | 7.783 | 7.275 | 6.942 | 6.383 | 6.108 | 5.942 | **Moment of Inertia of Net Cross-Sectional Area of Masonry, I\*\*\*\*n** **(in4/ft)** | | **Grouted Cell Spacing** | | | | | | | | | | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **6"** | 178.0 | 155.1 | 146.8 | 142.7 | 140.2 | 138.6 | 135.8 | 134.5 | 133.6 | | **8"** | 443.3 | 378.6 | 355.3 | 343.7 | 336.7 | 332.0 | 324.3 | 320.4 | 318.0 | | **10"** | 891.7 | 719.3 | 656.2 | 624.6 | 605.7 | 593.1 | 572.0 | 561.5 | 555.2 | | **12"** | 1571.0 | 1208.9 | 1076.3 | 1010.1 | 970.3 | 943.8 | 899.6 | 877.5 | 864.2 | | **14"** | 2529.4 | 1873.2 | 1632.9 | 1512.8 | 1440.7 | 1392.7 | 1312.6 | 1272.6 | 1248.6 | | **16"** | 3814.7 | 2737.2 | 2342.7 | 2145.5 | 2027.1 | 1948.2 | 1816.7 | 1751.0 | 1711.5 | **Radius of Gyration of the Average Cross-Sectional Area of Masonry, r\*\*\*\*ave** **(in)** | | **Grouted Cell Spacing** | | | | | | | | | | ---------------------- | ------------------------ | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | **CMU Wall Thickness** | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | **6"** | 1.62 | 1.79 | 1.87 | 1.91 | 1.94 | 1.96 | 2.00 | 2.02 | 2.03 | | **8"** | 2.20 | 2.43 | 2.53 | 2.59 | 2.63 | 2.66 | 2.71 | 2.74 | 2.76 | | **10"** | 2.78 | 3.04 | 3.16 | 3.24 | 3.29 | 3.33 | 3.39 | 3.43 | 3.45 | | **12"** | 3.36 | 3.64 | 3.79 | 3.88 | 3.95 | 3.99 | 4.07 | 4.12 | 4.15 | | **14"** | 3.93 | 4.25 | 4.41 | 4.51 | 4.59 | 4.64 | 4.74 | 4.79 | 4.83 | | **16"** | 4.51 | 4.84 | 5.02 | 5.14 | 5.22 | 5.28 | 5.39 | 5.45 | 5.49 | **Face-Shell Thickness of Masonry, t\*\*\*\*fs** **(in)** | **Concrete Masonry Unit Wall Thickness** | | | | | | | ---------------------------------------- | ------ | ------- | ------- | ------- | ------- | | **6"** | **8"** | **10"** | **12"** | **14"** | **16"** | | 1.00 | 1.25 | 1.25 | 1.25 | 1.25 | 1.25 | **Compression Section Width for Partially Grouted Walls, b\*\*\*\*w** | | | | **Grouted Cell Spacing** | | | | | | | | | | ---------------------- | ----------------------------------------------------------------------------------------------- | -------------------------------- | -------------------------------------------------------------------------------------- | --------- | --------- | --------- | --------- | --------- | --------- | --------- | ---------- | | | | | **8"oc** **(solid)** | **16"oc** | **24"oc** | **32"oc** | **40"oc** | **48"oc** | **72"oc** | **96"oc** | **120"oc** | | | | | **Number of open cells within the compression section,** **n\*\*\*\*open** | | | | | | | | | | | | | 0 | 1 | 2 | 3 | 4 | 5 | 8 | 11 | 14 | | **CMU Wall Thickness** | | **Cell Width** **b\*\*\*\*cell** | **Ratio of solid width-to-total width of the compression section, b\*\*\*\*w** **/ b** | | | | | | | | | | **6"** | | 6.3125" | 1.000 | 0.605 | 0.474 | 0.408 | 0.369 | 0.342 | 0.299 | 0.277 | 0.264 | | **8"** | | 6.3125" | 1.000 | 0.605 | 0.474 | 0.408 | 0.369 | 0.342 | 0.299 | 0.277 | 0.264 | | **10"** | | 6.125" | 1.000 | 0.617 | 0.490 | 0.426 | 0.388 | 0.362 | 0.319 | 0.298 | 0.285 | | **12"** | | 6.125" | 1.000 | 0.617 | 0.490 | 0.426 | 0.388 | 0.362 | 0.319 | 0.298 | 0.285 | | **14"** | | 6.125" | 1.000 | 0.617 | 0.490 | 0.426 | 0.388 | 0.362 | 0.319 | 0.298 | 0.285 | | **16"** | | 6.125" | 1.000 | 0.617 | 0.490 | 0.426 | 0.388 | 0.362 | 0.319 | 0.298 | 0.285 | | *Definitions:* | | | | | | | | | | | | | *b\*\*cell* | *= width of a single open cell* | | | | | | | | | | | | *n\*\*open* | *= total number of open (ungrouted) cells within the unit width of compression section* | | | | | | | | | | | | | *= (Grout Spacing) / 8" - 1* | | | | | | | | | | | | *b* | *= unit width of compression section* | | | | | | | | | | | | *b\*\*w* | *= unit width of the compression section minus the sum of the length of open (ungrouted) cells* | | | | | | | | | | | | | *= b - n\*\*open* *\* b\*\*cell* | | | | | | | | | | | | *b\*\*w* */ b* | *= (b - n\*\*open* *\* b**cell**) / b = 1 - (n\*\*open* *\* b**cell**) / b* | | | | | | | | | | | --- # Agent Instructions This documentation is published with GitBook. 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