Costco Wholesale Looking Good and Standing Strong

Costco is the world’s second largest retailer after Walmart, with over 273,000 employees and 803 store locations worldwide. Originally founded in Seattle in 1983, it had net sales of $163B in 2020.

Built on a difficult site and during a pandemic, the first Costco store opened in New Zealand in October 2022.

Costco Auckland is located at 2 Gunton Drive, Westgate in the suburb of Massey and is part of the Westgate Shopping Centre, one of New Zealand’s largest master planned urbanisation projects and the hub for the large and rapidly expanding communities of Auckland’s Northwest.

The building comprises of 15,000m² of ground floor retail, and overhead parking for over 800 cars. The development includes a fuel station, tyre centre, food court, optometrist, and hearing aid services along with groceries and homewares.

It is a very solid structure — steel and concrete.

KOROK brought many benefits to the project, the key one being high quality pre-finished internal walls, providing a clean aesthetic. The single-panel system ensured a fast install. Underlying these benefits is great fire and acoustic performance.

KOROK panels have been used:

As separation walls between the entry and main shop — ColorSteel Titania, vertical 7.2m high.
Around the main lifts — ColorSteel Titania.
For the fire escape stairwells — in galv and left visible.

Photo credit: Mark Scowen Photography

Warehouse, Factory and Retail Wall Systems

KOROK

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Manufactured from rolled steel and aerated concrete, KOROK fire and acoustic clip-together simplicity wall systems are high performance and lightweight.

Along with dividing walls for sheds, factories and warehouses, KOROK systems are suitable for:

Cinema walls
Intertenancy walls for terraced housing
Lift shaft, stair and duct walls
Acoustic barriers
External and boundary walls for sheds, factories and warehouses
Intertenancy walls for apartments, hotels and retirement complexes

KOROK systems are suitable for all areas of New Zealand.

The NZBC sets out both the legal minimum sound transmission between tenancies (Clause G6) and minimum levels of fire resistance (Clauses C3 and C6). The KOROK Intertenancy Systems Manual provides guidance on the specification and construction of systems that will both meet and exceed those minimum levels. However, designers should consider the comfort of occupants when selecting a system that will satisfy the occupants' expectations when using the space rather than the minimum required by law.

NZBC:

Clause B1: Structure — The KOROK Systems meet the requirements for loads arising from self-weight, earthquake, wind, impact and creep and shrinkage
Clause B2: Durability — Under normal conditions of dry internal use KOROK Intertenancy Systems have a serviceable life in excess of 50 years and satisfy the requirements of NZBC Clause B2 Durability
Clause C3: Fire Affecting Areas Beyond the Source — KOROK Intertenancy Systems can be used to provide passive fire protection in accordance with the requirements of NZBC Clause 3: Spread of Fire
Clause C6: Structural Stability —Compliance with (NZBC) Clause C6 'Structural Stability'. In order to satisfy the requirements of the New Zealand Building Code (clause 6) relating to Structural Stability designers must ensure that KOROK elements are supported by primary elements that have at least the same fire rating as the KOROK system that is used
Where the primary elements supporting the KOROK system are outside the fire cell, there is no requirement to apply the same FRR as the KOROK system. Notwithstanding, post fire stability requirements of the NZBC must also be satisfied
Clause G6: Airborne and Impact Sound — KOROK Intertenancy Systems, both meet and exceed the minimum requirements outlined in NZBC Clause G6. Consideration should be given to both the minimum requirements and the comfort of occupants

External Wall Systems

KOROK

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The KOROK External Wall Systems are all-in-one wall solutions for fire, acoustic and weather protection in external applications.

NZ Made

Post-Consumer Recyclable Content

Fire ratings up to –/240/240
Acoustic ratings up to STC 76

Along with External and boundary walls for sheds, factories and warehouses, KOROK systems are suitable for:

Dividing walls for sheds, factories and warehouses
Cinema walls
Intertenancy walls for apartments, hotels and retirement complexes
Lift shaft, stair and duct walls
Acoustic barriers
External and boundary walls for sheds, factories and warehouses
Terraced housing intertenancy

KOROK systems are suitable for all areas of New Zealand

CLAUSE B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4. The KOROK External Wall System meets the requirements for loads arising from self-weight, earthquake, wind, impact and creep and shrinkage [i.e. B1.3.3 (a), (f), (h), (i), (j) and (q)].
CLAUSE B2 DURABILITY: Performance B2.3.1 (b), 15 years, Performance B2.3.1 (c), 5 years. The KOROK External Wall Systems meet these requirements.
CLAUSE C3 FIRE AFFECTING AREAS BEYOND THE FIRE SOURCE: Performance C3.4, C3.5 andC3.6. The KOROK External Wall Systems will meet or contribute to meeting these requirements.
CLAUSE C6 STRUCTURAL STABILITY: Compliance with (NZBC) Clause C6 'Structural Stability' In order to satisfy the requirements of the New Zealand Building Code (clause C6) relating to Structural Stability designers must ensure that KOROK elements are supported by primary elements that have at least the same fire rating as the KOROK system that is used.
Where the primary elements supporting the KOROK system are outside the fire cell, there is no requirement to apply the same FRR as the KOROK® system. Notwithstanding, post fire stability requirements of the NZBC must also be satisfied
CLAUSE E2 EXTERNAL MOISTURE: Performance E2.3.2. The KOROK External Wall Systems will meet this requirement
CLAUSE F6 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. The KOROK External Wall Systems meet this requirement and will not present a health hazard to people.

BRANZ Appraised

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