Uncertainty about the correct LVL beam size for a 19-foot garage roof span to support a deck and snow loads.

AI and contractor give conflicting recommendations; there is no trusted, accessible tool that provides definitive engineering guidance for residential builders.

Severity

3Medium

Willingness to Pay

implied

Added

May 1, 2026

Workarounds Described

asks contractor for advice
uses AI for recommendation

Implied Software Gaps

Provide reliable LVL sizing based on span, load, and code; accessible to non-engineers

App Concept

SpanCalc Pro

A mobile-first tool that lets builders input span, load, and beam type to get code-compliant sizing recommendations instantly. It bridges the gap between complex engineering software and rule-of-thumb advice.

Key Features

Simple input for span, load, and beam material
Output with recommended size, spacing, and grade
References relevant building codes
Option to generate a PDF report for permits

Target Users: DIY homeowners and small contractors in residential construction

Revenue Model: Freemium with $9.99 per report or $29.99/mo unlimited subscription

Existing Solutions Mentioned

AIcontractor's advice

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