DMAC Structural Frame Designer is a professional structural engineering design and learning application that helps engineers, designers, students, consultants, and technical professionals evaluate framing concepts, strengthen engineering judgment, and support preliminary design decisions. The app includes 16 structural design and analysis tools plus 1,000 U.S. and international case studies, all presented through a modern, easy-to-use interface with dark teal-green and light modes. Ideal for concept development, training, preliminary studies, and engineering decision support, DMAC Structural Frame Designer helps users explore structural scenarios and make better-informed design choices. For educational, preliminary design, and decision-support use only. Final designs should be reviewed and approved by appropriately qualified licensed professionals.