Source: https://www.quantumsteeldesign.com/videos/c10x20/ Steel video · 0:49 # What Does C10x20 Mean? Steel Channel Explained Decode the C10x20 steel-channel designation, actual dimensions, nominal weight, and the eccentricity and torsion considerations of a singly symmetric channel. What you will learn - C: American Standard channel. - 10: Nominal depth: 10 in. - 20: Nominal weight: 20 lb/ft. Published August 6, 2026 [Watch on YouTube ↗](https://www.youtube.com/watch?v=-xVy0Qs77Xs) [Watch the Short ↗](https://www.youtube.com/shorts/cjH3gGSND4A) Practical context ## How the steel information fits the project workflow A channel has one web and two flanges extending to the same side. Its geometry, axes, and connection behavior require channel-specific properties and checks. Continue with the data ### C10x20 shape reference Move from the video explanation to the related reference, dimensions, properties, tools, and learning context. [Open related reference](https://www.quantumsteeldesign.com/steel-tools/shapes/c10x20/) Companion reading and practice ## Can you distinguish the label from the dimensions? For a fictional 12 ft C10X20 piece, nominal weight is 240 lb. The 20 in the designation is a weight per foot, not a flange width or thickness. Read the actual depth, flange, web, and centroid fields from the database. A channel is not symmetric in every direction; keep the source axis convention and intended orientation visible when interpreting properties. The reference drawing does not specify a project connection. ### Try it with a sample Use the linked record to identify weight, actual dimensions, and units as separate items. [Read the channel reference](https://www.quantumsteeldesign.com/steel-tools/shapes/c10x20/) Examples are fictional learning exercises. This companion text adds context to the video; the transcript below records the narration. Primary sources ## References and further reading - [AISC Shapes Database v16.0](https://www.aisc.org/aisc/publications/steel-construction-manual/aisc-shapes-database-v160/) Use the edition and requirements adopted for the project. These references support further reading; a short video does not reproduce the complete standards. Published by Quantum Steel Design. [Sources and editorial approach](https://www.quantumsteeldesign.com/about/#editorial-approach) · [Report a correction](https://www.quantumsteeldesign.com/contact/) · Companion guide updated September 28, 2026. Accessible transcript ## What Does C10x20 Mean? Steel Channel Explained transcript The visible transcript makes the video content available to people and search systems without requiring playback. - Here is how to read C ten by twenty on a structural steel drawing. - The C identifies an American Standard channel: one web with two flanges extending to the same side. - Ten is the nominal depth in inches. For this shape, the actual depth is ten inches. - Twenty is the nominal weight in pounds per foot. - The AISC database gives a flange width of two point seven four inches and a web thickness of point three seven nine inches. - Unlike a W-shape, a channel is only singly symmetric. Load position and connection eccentricity can introduce twist. - Use channel-specific properties and project-specific checks for loads, bracing, connections, and applicable code. - Explore C ten by twenty in the free Quantum Steel Design shape reference. Keep watching ## More structural steel detailing and fabrication videos. [View the complete video library](https://www.quantumsteeldesign.com/videos/) [0:55](https://www.quantumsteeldesign.com/videos/blank-steel-data-not-zero/) August 8, 2026AI-assisted detailing explainer ## Why Blank Steel Data Is Not Zero Learn why blank, zero, unknown, and not-applicable are different data states—and how silent conversion can make incomplete steel information appear valid. [Watch with transcript](https://www.quantumsteeldesign.com/videos/blank-steel-data-not-zero/) [Watch Short ↗](https://www.youtube.com/shorts/Iv2DZp-aR58) [0:55](https://www.quantumsteeldesign.com/videos/w12x26-vs-w12x40/) August 7, 2026Steel explainer ## W12x26 vs W12x40: Same Depth Family, Different Beam Compare W12x26 and W12x40 dimensions, weight, flange width, stiffness, and connection implications before treating two W12 beams as equivalent. [Watch with transcript](https://www.quantumsteeldesign.com/videos/w12x26-vs-w12x40/) [Watch Short ↗](https://www.youtube.com/shorts/eWLSHfLqtfM) [0:48](https://www.quantumsteeldesign.com/videos/2l4x4x3-8/) August 7, 2026Steel explainer ## What Does 2L4x4x3/8 Mean? Double Angles Explained Decode the 2L4x4x3/8 double-angle designation and understand why separation, connectors, eccentricity, and stability define the built-up member. [Watch with transcript](https://www.quantumsteeldesign.com/videos/2l4x4x3-8/) [Watch Short ↗](https://www.youtube.com/shorts/KCsMtMCJJjw)