Built-Up Section Studio

g. a W-beam reinforced with 1" rebar). 18, 10M–55M) and imperial (ASTM A615, #3–#18) size table, singly or as a spaced group, modeled as solid circular steel.

Drag/snap components on a canvas, edit parametric concrete/plate rectangles live, and compute gross section properties (A, centroid, Ix, Iy, Ixy, Sx/Sy, rx/ry, principal axes, weight) plus transformed-section estimates via modular ratios when E values are available. Detects component contacts/overlaps and material pairs, and recommends the matching CoLateral connection design tool (steel-steel, wood-wood, steel-wood, steel-concrete, wood-concrete) or records a future-handoff when no tool exists. 18 / ASTM A615, wood geometry is generated from standard dressed sizes, and custom/manual entries are flagged unverified.

3 member or connection design checks. Transformed properties assume full composite action; slip, fastener spacing, and load transfer must be designed separately. Steel library is starter/sample data, not a verified CISC table; wood E/density must be engineer-entered; contact detection for shaped sections is bounding-box based.

Reinforcing bars are modeled as solid circles at their nominal area/diameter - bar welding, development/anchorage, and the strain compatibility/composite action of added reinforcement are NOT checked. Rotation is limited to 90° increments.

Use to study built-up section geometry and properties and to route connection design to the linked tools. Verify all section data against published tables and design every component interconnection before relying on composite properties.