Views: 0 Author: Site Editor Publish Time: 2026-06-16 Origin: Site
Choosing between closed, open, and re-entrant steel deck profiles directly impacts fire resistance, structural strength, and construction speed. Closed decks offer smooth ceilings and better fire ratings. Open decks install fast but need fireproofing. Re-entrant decks sit in the middle. Nail the selection with a clear side‑by‑side comparison.
How to tell the three deck types apart at a glance?
Type | Section Feature | Typical Model | Composite Deck Rebar Requirement |
Open (Deck) | Open rib facing up | YXB75-200-600 YXB51-250-750 | Requires bottom transverse shear reinforcement + load-bearing rebar |
Closed (Deck) | Closed rib, wave peak closed | YXB65-170-510 YXB65-185-555 | Closed rib shape provides shear connection; bottom transverse shear reinforcement may be omitted (subject to design verification) |
Re-entrant (Deck) | Dovetail interlock design | YX53-200-600 | Requires bottom transverse shear reinforcement + load-bearing rebar |
Comparison of Core Parameters
Parameter | Open Deck (YXB75-200-600) | Closed Deck (YXB65-185-555) | Re-entrant Deck (YX53-200-600) |
Rib height (mm) | 75 | 65 | 53 |
Effective coverage width (mm) | 600 | 555 | 600 |
Gross width (mm) | 1000 | 1045 | 1000 |
Common thickness (mm) | 0.8~1.2 | 0.8~1.2 | 0.75~1.2 |
Material utilization rate | 60% | approx. 53% | 60% |
Deck Selection Decision Matrix
Comparison Item | Open Deck | Closed Deck | Re-entrant Deck |
Unit price | Low | Medium to high | Medium |
Bottom shear reinforcement required | Yes | No (subject to design verification) | Yes |
Construction speed | Slow (rebar placement + sealing) | Fast | Medium |
Concrete leakage risk | High | Low | Medium to low |
Deck bottom flatness | Poor | Good | Medium |
Accessory compatibility | High | Medium | Low |
Selection Recommendations
Application Scenario | Recommended Deck Type | Key Considerations |
Residential / Apartment | Closed deck (first choice) | Flat soffit looks fine even without a suspended ceiling. Pay attention to fire design. |
Industrial Plant | Open deck or re-entrant deck | Cost priority; concrete leakage risk is acceptable in this setting. |
Office / Commercial | Closed deck (first choice) | Easy MEP installation; cost advantage from eliminating shear rebar. |
Span ≤ 2.5m | Any of the three | Choose the cheapest option — usually open deck. |
Span ≥ 4m | Closed deck preferred, or open deck with temporary support | Closed deck offers better strength; open deck needs shoring. |
A warehouse once swapped closed deck for open to save cost. Concrete leaked, the job stopped, and rework topped $30,000. Bottom line: unit price misleads. Closed deck costs more per sheet but cuts shear rebar, patching, and delays. Choose by total installed cost, not material price alone.
For more information needed or any inquiry,please feel free to contact Yumisteel team.
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