Source: https://www.quantumsteeldesign.com/videos/wt9x17-5/ Steel video · 0:54 # What Does WT9x17.5 Mean? Structural Tee Explained Learn what WT9x17.5 means, how the tee relates to a W18x35, its actual dimensions, and why stem direction and connection eccentricity matter. What you will learn - WT: Tee split from a W-shape. - 9: Nominal tee depth. - 17.5: Nominal weight: lb/ft. Published August 6, 2026 [Watch on YouTube ↗](https://www.youtube.com/watch?v=pAwd8ZTvpZY) [Watch the Short ↗](https://www.youtube.com/shorts/uF9VY1tcv-4) Practical context ## How the steel information fits the project workflow Splitting a W18×35 through its web produces two WT9×17.5 structural tees. Use WT properties and project-specific engineering for its actual orientation and loading. Continue with the data ### WT9x17.5 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/wt9x17-5/) Companion reading and practice ## Which dimensions belong to the tee? For a fictional 10 ft WT9X17.5 piece, the nominal weight is 175 lb. That calculation is independent of whether its flange or stem is shown vertically in a particular drawing view. Use the tee’s actual dimension fields and the source axis convention when reading its properties. Do not treat it as a complete W shape or assume that the x axis is always the stronger axis. Its placement and connection requirements come from the project detail. ### Try it with a sample Inspect the profile and compare the x- and y-axis properties with their field definitions. [Read the tee reference](https://www.quantumsteeldesign.com/steel-tools/shapes/wt9x17-5/) 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 WT9x17.5 Mean? Structural Tee Explained transcript The visible transcript makes the video content available to people and search systems without requiring playback. - What does W T nine by seventeen point five mean on a steel drawing? - W T identifies a structural tee produced from a W-shape. Nine is nominal depth, and seventeen point five is pounds per foot. - Split a W eighteen by thirty-five through its web, and you get two W T nine by seventeen point five tees. - The actual tee depth is eight point eight five inches, and its flange is six inches wide. - The web is point three inches thick, the flange is point four two five, and the weight is seventeen point five pounds per foot. - A tee is unsymmetrical about its horizontal axis, so stem direction, eccentricity, restraint, and connections matter. - Use W T properties and project-specific engineering for the actual loading, orientation, unbraced length, and code. - Explore the full shape at Quantum Steel Design. 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)