AISC MC-Shapes: Dimensions and Section Properties
Browse AISC miscellaneous MC channels by depth and weight. Compare dimensions and section properties in imperial or metric units.
Steel Section Finder
Search or browse standard steel sections.
Showing AISC · MC Channels · Imperial
AISC Shapes Database v16.0 · 2,299 sections
Searches every available library and shape family. Leave the field empty to browse the filters below.
Filter by series
Showing the most relevant 75 sections.
| Designation | Weight (lb/ft) | Depth, d (in) | Flange width, bf (in) | Area (in²) | Ix (in⁴) | Sx (in³) |
|---|---|---|---|---|---|---|
| MC18x42.7 | 42.7 | 18 | 3.95 | 12.6 | 554 | 61.5 |
| MC18x45.8 | 45.8 | 18 | 4 | 13.5 | 578 | 64.2 |
| MC18x51.9 | 51.9 | 18 | 4.1 | 15.3 | 627 | 69.6 |
| MC18x58 | 58 | 18 | 4.2 | 17.1 | 675 | 75 |
| MC13x31.8 | 31.8 | 13 | 4 | 9.35 | 239 | 36.7 |
| MC13x35 | 35 | 13 | 4.07 | 10.3 | 252 | 38.8 |
| MC13x40 | 40 | 13 | 4.19 | 11.7 | 273 | 41.9 |
| MC13x50 | 50 | 13 | 4.41 | 14.7 | 314 | 48.3 |
| MC12x10.6 | 10.6 | 12 | 1.5 | 3.1 | 55.3 | 9.22 |
| MC12x14.3 | 14.3 | 12 | 2.12 | 4.18 | 76.1 | 12.7 |
| MC12x31 | 31 | 12 | 3.67 | 9.12 | 202 | 33.7 |
| MC12x35 | 35 | 12 | 3.77 | 10.3 | 216 | 36 |
| MC12x40 | 40 | 12 | 3.89 | 11.8 | 234 | 39 |
| MC12x45 | 45 | 12 | 4.01 | 13.2 | 251 | 41.9 |
| MC12x50 | 50 | 12 | 4.14 | 14.7 | 269 | 44.9 |
| MC10x6.5 | 6.5 | 10 | 1.17 | 1.95 | 22.9 | 4.59 |
| MC10x8.4 | 8.4 | 10 | 1.5 | 2.46 | 31.9 | 6.39 |
| MC10x22 | 22 | 10 | 3.32 | 6.45 | 102 | 20.5 |
| MC10x25 | 25 | 10 | 3.41 | 7.34 | 110 | 22 |
| MC10x28.5 | 28.5 | 10 | 3.95 | 8.37 | 126 | 25.3 |
| MC10x33.6 | 33.6 | 10 | 4.1 | 9.87 | 139 | 27.8 |
| MC10x41.1 | 41.1 | 10 | 4.32 | 12.1 | 157 | 31.5 |
| MC9x23.9 | 23.9 | 9 | 3.45 | 7.02 | 84.9 | 18.9 |
| MC9x25.4 | 25.4 | 9 | 3.5 | 7.47 | 87.9 | 19.5 |
| MC8x8.5 | 8.5 | 8 | 1.87 | 2.5 | 23.3 | 5.82 |
| MC8x18.7 | 18.7 | 8 | 2.98 | 5.5 | 52.4 | 13.1 |
| MC8x20 | 20 | 8 | 3.03 | 5.87 | 54.4 | 13.6 |
| MC8x21.4 | 21.4 | 8 | 3.45 | 6.28 | 61.5 | 15.4 |
| MC8x22.8 | 22.8 | 8 | 3.5 | 6.7 | 63.8 | 15.9 |
| MC7x19.1 | 19.1 | 7 | 3.45 | 5.61 | 43.1 | 12.3 |
| MC7x22.7 | 22.7 | 7 | 3.6 | 6.67 | 47.4 | 13.5 |
| MC6x6.5 | 6.5 | 6 | 1.85 | 1.95 | 11 | 3.66 |
| MC6x7 | 7 | 6 | 1.88 | 2.09 | 11.4 | 3.81 |
| MC6x12 | 12 | 6 | 2.5 | 3.53 | 18.7 | 6.24 |
| MC6x15.1 | 15.1 | 6 | 2.94 | 4.44 | 24.9 | 8.3 |
| MC6x15.3 | 15.3 | 6 | 3.5 | 4.49 | 25.3 | 8.44 |
| MC6x16.3 | 16.3 | 6 | 3 | 4.79 | 26 | 8.66 |
| MC6x18 | 18 | 6 | 3.5 | 5.29 | 29.7 | 9.89 |
| MC4x13.8 | 13.8 | 4 | 2.5 | 4.03 | 8.85 | 4.43 |
| MC3x7.1 | 7.1 | 3 | 1.94 | 2.11 | 2.72 | 1.81 |
Family overview
What are AISC MC Channels?
AISC MC-shapes are miscellaneous channels with a wider range of proportions than standard C-shapes. They follow the depth × weight designation pattern and are useful when a non-standard channel geometry fits the framing or bracing need. Use tabulated dimensions for detailing. This hub filters the finder to MC channels for comparison, charts and calculator handoff.
Designations
Understanding MC Channels designations
MC12×31
MC designations follow the depth × weight pattern, such as MC12×31. Confirm flange and web dimensions in the table before detailing.
Properties
MC Channels properties explained
These properties are especially relevant when comparing MC Channels. View the complete property glossary.
| Symbol | Property | Units | Why it matters |
|---|---|---|---|
| Weight | Weight | lb/ft, kg/m | Mass per unit length; used for self-weight and economy comparisons |
| d | Overall depth | in, mm | Overall depth and clearance |
| bf | Flange width | in, mm | Overall flange width and lateral behaviour |
| tw | Web thickness | in, mm | Web thickness and shear-related behaviour |
| tf | Flange thickness | in, mm | Flange thickness and flexural/local behaviour |
| A | Cross-sectional area | in², mm² | Total steel cross-sectional area |
| Ix | Moment of inertia (x) | in⁴, mm⁴ | Major-axis flexural stiffness |
| Iy | Moment of inertia (y) | in⁴, mm⁴ | Minor-axis flexural stiffness |
| Sx | Elastic section modulus (x) | in³, mm³ | Elastic bending property about the x-axis |
| Sy | Elastic section modulus (y) | in³, mm³ | Elastic bending property about the y-axis |
| Zx | Plastic section modulus (x) | in³, mm³ | Plastic bending property about the x-axis |
| Zy | Plastic section modulus (y) | in³, mm³ | Plastic bending property about the y-axis |
| rx | Radius of gyration (x) | in, mm | Strong-axis radius of gyration |
| ry | Radius of gyration (y) | in, mm | Weak-axis radius of gyration and lateral stability relevance |
| J | Torsional constant | in⁴, mm⁴ | Torsional constant |
| Cw | Warping constant | in⁶, mm⁶ | Warping constant for lateral-torsional behaviour |
Library summary
Computed MC Channels summary
The current AISC MC Channels library contains 40 sections across 10 nominal-depth series. Published weights range from 6.50 to 58.00 lb/ft , and actual depths range from 3.00 to 18.00 inches .
- Lightest section
- MC10X6.5
- Heaviest section
- MC18X58
- Ix range
- 2.72 – 675.00 in⁴
- Sx range
- 1.81 – 75.00 in³
Selection
How to compare MC Channels
- Compare MC options against standard C channels of similar depth.
- Check flange width when connection geometry is constrained.
- Compare Ix and weight for the intended orientation.
- Analyze finalists under the same span and loads.
Beam calculator
Analyze this family in Optimal Beam
Select any MC channel and load it into the Optimal Beam calculator.
Source: AISC Shapes Database v16.0 · Verified July 2026 · View methodology
Questions & answers
MC Channels FAQs
What is an AISC MC-shape?
An MC-shape is a miscellaneous channel with proportions outside the American standard C series.
When should I choose MC over C?
When the required flange width, weight or depth is better matched by an MC listing than by a standard C channel. Verify supply and properties.
Can I download an MC size chart?
Yes. Use the family chart controls on this page or in the finder toolbar.
Can I analyze an MC channel in Optimal Beam?
Yes. Select the section and choose Analyze to load its properties into the calculator.