Questions about the Span-to-Depth Rules poster

What’s on the Span-to-Depth Rules poster?

The rule, 3 worked examples, and the mistake everyone makes. Structural depth is roughly the span divided by a number that depends on the system.; depth = span / ratio; Steel beam, 9 m = 9000 / 20 = 450 mm; Timber joist, 4 m = 4000 / 18 = 222 mm; Flat slab, 7.5 m = 7500 / 30 = 250 mm; Common mistake: Drawing a 200 mm zone for a 12 m span → Reserve 600 mm plus services. Educational reference. Typical ratios: timber 16-20, steel beam 18-22, concrete beam 12-16, flat slab 28-33.

Who is the Span-to-Depth Rules poster for?

Span-to-Depth Rules belongs to the Architecture section rather than to a school year, because design is not something one grade owns. Anyone learning structure can pin it up — a beginner, a student mid-course, or someone revising years later.

When should you use the Span-to-Depth Rules poster?

Use it to reserve a structural zone in section. Too little, and the ceiling drops. A wall chart earns its place by being glanceable from where the work is happening, so Span-to-Depth Rules belongs on the wall where that design work actually happens, within glancing distance, rather than filed away.

What other posters go with Span-to-Depth Rules?

Arches, Vaults and Domes, How a Beam Works and Cantilevers sit alongside Span-to-Depth Rules in the Architecture section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Arches, Vaults and DomesHow a Beam WorksCantilevers

Is the Span-to-Depth Rules poster free to download and print?

Yes. Span-to-Depth Rules downloads as a free PDF with no account, no email and no watermark, like everything else in the Architecture section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence

What size does the Span-to-Depth Rules poster print at?

Span-to-Depth Rules is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Span-to-Depth Rules loses nothing.Printing guide