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📏 Preliminary Sizing Explorer
One span, three structural systems. Slide the span and watch how RC beam depth, RC slab thickness, and steel beam depth all scale together in real time — a feel for how member size relates to span across different materials, side by side. No score, no target, just direct comparison.
| System | Rule | Range |
|---|
These are standard, widely-taught preliminary sizing
rules-of-thumb — useful for a first guess before real calculation, never a substitute for
it. Real member sizes depend on loads, material grade, code requirements, and span
continuity; always verify with the appropriate calculator before using any number for
actual design.
Rules used
RC beamDepth h ≈ L/12 to L/10 for a simply-supported reinforced concrete beam.
RC slabThickness h ≈ L/32 to L/28 for a one-way reinforced concrete slab.
Steel beamDepth h ≈ L/20 for a typical steel floor beam.