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Tuesday, 29 November 2016 10:49

Two green ratings ticked

Bringing together green building and urban renewal with quality architectural design, 4 Stan Road demonstrates respect for its context as well as a sustainable future. The development earned both four-star Green Star SA Design and As-Built certifications from the Green Building Council of South Africa (GBCSA).

Context
Bordered by three residential towers and a large office development, the original single-storey building, constructed in 1991, somewhat disappeared between the massive developments and could no longer accommodate the growing needs of its occupants.

MDS Architecture designed the office building for a consortium of professionals and today, 4 Stan Road is a slick, sculptural eight-storey corporate building.

Facade treatment
To manage the typical heat build-up of a west-facing facade and control the associated glare issues, the street facade was treated as a solid face with full height fins and thin slivers of glazing.

The north-facing facade is fully glazed, with external views provided for over 80% of the usable floor area. Shading screens along this facade, together with the glazing type and ratio, ensure adequate levels of thermal comfort.

Lighting and cooling
Energy-efficient lighting is used throughout the building and two air-cooled chillers are used with two variable air volume (VAV) air-handling units per floor. In terms of indoor environmental quality (IEQ), fresh air is provided at over 12,5l/s/person, which exceeds the SANS standard of 7,5l/s/person.

Water and sanitation
Water-efficient sanitary fittings limit wash hand basin flow rate to 5l/min, and urinals to 0,9l/flush. Toilets have dual flush mechanisms, and shower heads have a 9l/min flow rate. Minimal landscaping further decreases the demand for potable water used for irrigation.

Sub-metering of both water and energy is connected to an automated system which will enable the collecting, monitoring and recording of data, as well as alert to irregular trends in consumption. Building tuning post-occupancy is also a contractual requirement between the building owner and the various consultants and contractors.

Healthy materials
All paints, adhesives, sealants and carpets have volatile organic compound (VOC) limits that fall within the Green Star allowance. Carbon emissions have also been reduced by using steel with a recycled content of more than 60%, a reduction in the absolute quantity of Portland cement by over 30%, and by reducing the use of PVC by more than 30%.

Waste management
An adequately sized waste recycling area is provided that is safe and easily accessible. Tenants are encouraged to separate waste and recycling material into separate bins, and a service provider collects the recycling material for separation off site.

Parking podium
Parking is provided in excess of the minimum statutory requirement for offices, and is accommodated above ground in a podium structure that is naturally ventilated and illuminated.

The top of the parking podium forms a landscaped breakaway sky deck for the building’s users, with large-scale indigenous trees. The podium itself is clad with recycled security grilles from the original building, which have been fitted with planters in order to eventually create a green wall.

Alternative transport
The building is located close to Gautrain bus routes and cyclist facilities, including 23 secure bicycle storage spaces, showers, change rooms and lockers that are provided to allow building users to cycle or even run to work.

An added accolade
Green building consultants, Solid Green, undertook the Green Star certification process, which won the project the Best Quality Submission category at the Green Star SA Leadership Awards.

Full thanks and acknowledgement are given to Solid Green Consulting and MDS Architecture for the information given to write this article.