The Department of Building and Housing is asking for public help with its investigation into some of the buildings most damaged by Christchurch's earthquake.
The investigation is looking at why the Canterbury Television, Pyne Gould Corporation, Forsyth Barr and Hotel Grand Chancellor buildings suffered such serious damage.
The department is asking for photographs, video recordings and first-hand accounts of the state or response of the buildings from before, during and after the quake.
The deadline for public information is 31 May.
