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Seismic Strengthening - Auckland Grammar School

Details

Tender Closed
RFx ID : 19220624
Tender Name : Seismic Strengthening - Auckland Grammar School
Reference # : Seismic
Open Date : Wednesday, 15 November 2017 9:00 AM (Pacific/Auckland UTC+13:00)
Close Date : Friday, 8 December 2017 5:00 PM (Pacific/Auckland UTC+13:00)
Department/Business Unit : Board of Trustees - Approve by BoT - ie. School Principal
Tender Type : Request for Tenders (RFT)
Tender Coverage : Sole Agency  [?]
Categories :
  • 72000000 - Building and Facility Construction and Maintenance Services
Regions:
  • Auckland
Required Pre-qualifications : None
Contact : All questions must be submitted via GETS through the Q&A option.
Alternate Physical Delivery Address  :
Alternate Physical Fax Number  :
Overview

Background:

Opus limited were contracted by Auckland Grammar School to undertake a Detailed
Seismic Assessment (DSA) of various buildings within the school grounds and to make
recommendations of how to bring any existing buildings / structures found to be below
67% of the New Building Standard (NBS) to above 67%.

In May and July 2015 Opus submitted DSA reports to the school containing
recommendations that several buildings needed to be upgraded to meet the 67% NBS

Envivo Ltd have undertaken detailed design services to undertake the strengthening of
the bell towers in Block 9 and the Library in Block 5.

The Contract Works required are: Seismic Strengthening requirements

The four bell towers all require seismic strengthening.
The required works to the bell towers will involve the following
i. Tie the inner and outer brick layers of the bell towers together with metal
rods so that the two layers would act as one structure.
ii. Replace the under sized parts of the existing steel frames.
iii. Extend out the existing concrete mases of the frames to tie into the inner
walls of the towers.
iv. Spray gunite to the inside of the towers which will serve two purposes –
firstly to a form a continuous strengthening layer to the inside of the towers
and secondly to tie the upgraded pre-existing steel frames to the towers
(and thus utilising the strength of the previous seismic upgrading works).

• Library Parapet – The seismic strengthening works to the external library parapet wall
requires a fabricated steel frame to be fixed to the rear of the parapet.

• Heritage Room Ceiling –. The seismic strengthening works will involve the retro-fitting
of cross bracing to the existing trusses of the extension.

• Opening in Staff Room Wall –. Form a new opening in existing timber framed staff
room braced wall.