Everything you need to specify
Girder-Slab®.
Free tools, standard details, and direct engineering consultation from CS3 — all at no cost to the project.
⚡ Interactive Tool — Registration Required
D-Beam® Girder Calculator v3.5
Live structural design tool. Enter span, loading, and design method (ASD or LRFD) to evaluate D-Beam® sizing in real time.
Tools that work with
your existing workflow.
Common questions
from the EOR.
Yes. Both ASD (AISC 9th Edition) and LRFD (AISC 14th Edition) are supported. CS3 provides design tools compatible with both methods, and the D-Beam® Calculator handles both approaches.
No. Buildings using the Girder-Slab® system can be built as high as any other structural steel building. The system integrates with any standard lateral load-resisting system — braced frames, moment frames, or concrete shear walls.
The D-Beam® girder is fabricated by the project's local steel fabricator through standard competitive bidding, as part of the complete structural steel package. No sole-source components, no proprietary suppliers — your existing steel sub can build it.
UL Floor-Ceiling Assembly K912, certified under ANSI/UL 263 (US) and CAN/ULC-S101 (Canada). Restrained assembly: 2-hour and 3-hour. Unrestrained: 2-hour. The D-Beam® bottom flange requires SFRM or a gypsum board soffit — standard fireproofing practice.
Load-tested at Villanova University and Auburn University well above code-required residential live loads. The D-Beam® performed without failure at elevated loads. Auburn's 2024 research program also included component pushout testing and a CLT variant study.
Dedicated core zones allow mechanical, electrical, and plumbing penetrations through the hollow-core slab — the same practice as any precast system. Penetrations must avoid the beam's grout zone and the plank's prestressing strands. CS3 provides MEP coordination guidance as part of the free consultation.
CS3 works directly with the engineer of record.
CS3 provides direct consultation to the structural engineer of record at no cost. This includes design tools, standard details, specification guidance, and technical support throughout design and construction administration.
No retainer. No fee arrangement. No obligation.
- Building height and floor-to-floor target
- Typology: residential, hospitality, student housing, senior living
- Market location and project schedule target
- Any height restriction or floor-count objectives
Response within one business day.
Start with a
free evaluation.
CS3 works directly with developers, engineers, and construction teams to evaluate project fit — at no cost to the project.