STRIDE: Structural Tool-Guided Reasoning for Intelligent Design and Evaluation

Computable beam-and-column framing layouts encode load paths for early structural analysis, member sizing, and architectural design exploration. Constructing these layouts from architectural floor plans remains difficult because column locations, beam connectivity, and member sizes interact through geometry and structural response. One-shot generation cannot use computed responses to revise a layout, while exhaustive graph search requires repeated structural analyses and member sizing. We introduce STRIDE (Structural Tool-Guided Reasoning for Intelligent Design and Evaluation), an LLM agent that reads a plan raster and wall graph, generates a beam-and-column framing graph, and uses finite-element feedback to revise it. It links governing member responses to editable beam and column decisions, uses differentiable frame sensitivities to size members, and reevaluates proposed graphs, closing the loop from plan interpretation to structural revision. Across six real architectural projects, STRIDE generates layouts that pass structural response checks; its feedback-guided revisions reduce gross beam-and-column volume by 13.95% on average under a common member-sizing budget. The resulting framing graphs retain explicit beam connectivity and column locations, compile into three-dimensional finite-element models, and support further structural design iterations.