A technology that maximizes structural efficiency, stability, cost-effectiveness, and construction efficiency by combining the mechanical properties of composite beams with the economic advantages of RC structures and the constructability of steel structures (Patent No. 10-0939970)

Optimization of bending moment distribution enables reduction in story height

Introduction of HRC

Development as Precast Concrete (PC)

Reduction in steel quantity, omission of fireproof coating

Excellent constructability, enabling shortened construction periods and high-quality construction

Factory Production, On-Site Assembly

Reinforced Concrete T-Beam

Excellent usability in terms of stability, vibration, and deflection

A column with excellent constructability and manufacturability that maintains the advantages of CFT columns but can be filled without the need for a tremie pipe, ensuring the quality of high-strength concrete

Lower construction costs

▼ 30–50% compared to H-beam columns
▼ 15–25% compared to general CFT columns
▼ 15–20% compared to PC columns

Lower CO₂ emissions

CO₂ emissions ▼ approx. 15% compared to SRC
Amount of imported steel used
Reduced import substitution effect

Higher space utilization rate

Reduction in column cross sections increases space utilization rate
Approx. 45% fewer cross sections than SRC columns
Can be applied to to various structural systems

Excellent seismic performance

CFT structure with excellent seismic performance
Use of technology with excellent seismic performance
Guaranteed to benefit the public

Shortened construction period

No need for column formwork or other temporary structures
Formwork installation/removal period shortened
No need for separate curing period

Efficient for buildings with high ceilings and heavy loads

Excellent applicability to warehouse factory-style buildings

Shortened production period

Factory production
Mass production possible
Easy to source materials

Efficient for top-down construction

Increased cross-sectional efficiency due to composite action

• STEP 01Unit member bending

  

• STEP 02Punching of bent member

  

• STEP 03First assembly (internal tremie pipe formation)

  

• STEP 04Vertical diaphragm assembly

  

• STEP 05Secondary assembly (column cross-section fit-up)

  

• STEP 06Main welding (flare-bevel weld)

  

• STEP 07Vertical diaphragm weld

  

• STEP 08Production complete, dimensional inspection & non-destructive testing, preparation for shipment

  

Posco-box column is an abbreviation for a closed-section composite column made by press-bending high-performance steel (HSA600, SM4608, SM355, etc.) (Patent No. 10-1940857).

Increased compressive strength of concrete

01

Reduction in column cross sections compared to RC structures increases usable building space

02

Application of rectangular cross sections enables rational design of buildings with various structures

03

Elimination of formwork and reduction in steel materials lowers construction costs

04

Main Features

• STEP 01

  Bending and dimensional inspection of unit members

  

• STEP 02

  Fit-up

  

• STEP 03

  Main welding (SAW, submerged arc welding)

  

• STEP 04

  Nondestructive testing (UT, MT)

  

A composite beam with a rebar truss girder selectively installed inside the bent lower U-shaped steel plate to enhance both the strength and stiffness of the beam

Main Features

Ease of constructionAssembly section constructed using the same method as conventional steel beams

Reduction in quantity30-40% reduction in steel usage compared to conventional steel beams

Reduction in story heightOptimal design for additional story height reduction

• 

  Excellent waterproofing effect and reduced noise and vibration

  Resistant to rust and corrosion

  Functionally equivalent to a concrete surface

• 

  Relatively vibration- and noise-free, and capable of addressing issues with vibration and leakage

  Sub beam spacing of 3.3 m – 3.6 m reduces steel frame weight

  No separate maintenance

• 

  Standard model lowers construction costs

  Easy construction and shortened construction period