Typical Ratings – QuakeStar

Some indicative QuakeStar examples

REAL BUILDINGS - Based on existing reports and only partial information
QuakeStar Preliminary Assessments Summary - Office Buildings

Design	%NBS	QuakeStar Score	Safety	Damage	Repair	External Factors	Comment
1950s	60	62	★	★★	★	3	Robust MWD design but dated
1987	100	121	★★★	★★★	★★	4	Stair details not checked
1988	100	133	★★★	★★★	★★	4	Assumes no issues with floor support
Late 70s	75	100	★★	★★	★	5	Limited by façade detailing (**** otherwise)
1996	65	71	★★	★★	★	4	Damage issues with floors and reclaimed site
1973	90	88	★★	★★	★★	5	Issues with separation, stairs
1973/2004	80	97	★★	★★	★	3	Close to *** on Safety
1986	65	54	★	★★	★	2	Separation, column capacities
1986	90	73	★	★★	★	2	Stair issues. Otherwise **
1979/2004	100	100	★★	★	★	4	Safety *** with no issues on stairs / floors
2009	100	107	★★★	★★	★	6
2002	133	161	★★★	★★★★	★★	4	133%NBS means low impact at 500yr shaking
1989	120	145	★★★	★★★	★★	4
1986	110	96	★★	★★	★★	3	Issues with diaphragms / blockwall separation
Late 70s	110	80	★★	★★	★	3	Issues with floor supports and column detailing
70s /2007	100	110	★★★	★★★	★★	3

This table shows some indicative ratings based on existing assessments of some existing multi-storey buildings in Wellington and Auckland. Not every aspect has been assessed to meet QuakeStar requirements but the table gives an indication of how buildings of different types and ages could rate.

Some indicative QuakeStar examples

IMAGINARY BUILDINGS - Including possible new designs
QuakeStar Preliminary Assessments Summary

Design	%NBS	QuakeStar Score	Safety	Damage	Repair	Comment
1930	40	30		★	★	URM with 40%NBS
1930	50	40	★	★	★	URM with 50%NBS
1960	50	45	★	★	★	Pre 1965 Reinforced Concrete with 50%NBS
2015	100	130	★★★	★★	★	New IL2 Design - conventional
2015	100	130	★★★	★★★★	★★	New IL2 Design - with Base Isolation
2015	100	170	★★★★	★★★	★★	New IL3 Design - conventional
2015	100	170	★★★★	★★★★★	★★★	New IL3 Design - with Base Isolation
2015	100	230	★★★★★	★★★	★★★	New IL4 Design - conventional
2015	100	230	★★★★★	★★★★★	★★★★	New IL4 Design - with Base Isolation

This table shows some hypothetical examples to illustrate the full range of ratings – from a low-rated old brick building (URM40) to a modern building designed to IL4 requirements with the additional benefit of base-isolation which rates 5-star for Safety, Damage and Repair Time.