Choosing between closed, open, or re-entrant deck affects fire safety, installation speed, and total cost. One comparison table makes the right call easy.
How to quickly identify the three deck profiles?
|
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. |
Each deck profile has its place. Open decks work for industrial cost savings. Closed decks deliver flat soffits and fire safety for residential projects. Re entrant sits in between. Match the profile to your project's real needs,span, fire rating, and budget. The right choice saves money where it matters most.
For more information needed or any inquiry,please feel free to contact Yumisteel team.
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