Research Article
Development of an Efficient Steel Beam Section for Modular Construction Based on Six-Sigma
Table 6
Correlation between the quality characteristics and key functions.
| Quality characteristic | Key function | Assembly of modules | Ensuring structural performance | Secondary function | Welding end-plate | Connecting beam and column | Connecting beam and slab | Connecting beam and ceiling track | Connecting beam and wall track | Flexural strength of beam | Minimize deflection and vibration of beam | Earthquake and wind resistance | Fire resistance | Plumbing equipment penetration | Transportation of modules |
| Price of beam | | | | | | | | | | | | Surface area per unit length | | | | | | | | | ◎ | | | Welding length per unit length | | | | | | ◎ | | ○ | | | | Contribution to competitiveness of module | | | | | | | | | | | | Span length | | | | | | | ◎ | | | | | Thickness of webs | | | ◎ | ◎ | | | | | | | | Diameter of web opening | | | | | | ○ | | | | ◎ | | Number of webs | ○ | ◎ | ○ | ○ | | | | | | | | Thickness of flanges | | | | | ◎ | | | | | | | Number of openings | | | | | | ○ | | | | ◎ | | Height of ceiling and floor beams | | | | | | | ◎ | | | | ◎ | Weight of floor beams per unit area of plan | | | | | | | | | | | | Structural performance of beam | | | | | | | | | | | | Moment of inertia per sectional area of beam | | | | | | | ◎ | | | | | Section modulus per sectional area of beams | | | | | | ◎ | | ◎ | | | | Lever arm of bolts at the end plate | ◎ | ◎ | | | | | | ◎ | | | | Quality of manufacturing | | | | | | | | | | | | Number of axes of symmetry | | | ◎ | ○ | | | | | | | | Radius of curved section | | | | ○ | ◎ | | | | | | |
| Priority ratio | 6.5% | 9.5% | 8.6% | 6.7% | 4.7% | 16.7% | 19.7% | 11.9% | 0.6% | 10.1% | 4.8% | Rating | 8 | 5 | 6 | 7 | 10 | 2 | 1 | 3 | 11 | 4 | 9 |
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