Table 1.

Developed under-utilisation scenarios and associated design and appraisal approaches

ScenarioDesign approachAppraisal approach
1BS 449-2:1969 (BSI, 1969): Optimal compliance 
2BS 5950-1:2000 (BSI, 2001): Optimal compliance 
3EC: Omitting reduction/combination factors (ξ, ψ) 
4EC: Omitting imposed load reduction factors (αa, αn)EC: Optimal compliance
5EC: Targeting UR = 0.8 
6EC: Using over-specified imposed loads 
7  
8 EC: Using experienced imposed loads
9EC: Optimal complianceEC: Using residential imposed loads
10 EC: With average material strength
11 EC: With reduced partial factor for permanent loads (γ)

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