Resources | LEED v4

LEED v4

The Architectural, Engineering and Construction community has long recognized steel for its strength, durability and functionality.  More recently, steel’s high recycled content and end of life recovery rates have become important attributes in helping to obtain LEED certification.

The latest version, LEED v4, takes an expanded look at building material credits.  These additions include Life Cycle Assessment, Environmental Product Declarations and improved product transparency.

ArcelorMittal Dofasco construction products can help obtain LEED v4 points in the following categories:

Environmental Product Declarations

ArcelorMittal is pleased to announce the publication of the first product-specific Type III Environmental Product Declaration (EPD) among North American steel mills.

Our EPD for cladding, roofing and deck products complies to stringent ISO 14040/44, ISO 14025 and ISO 21930 standards. It will help our partners and customers obtain two LEED points when selecting one of our steel construction materials. Points for the LCA study are allocated as following:

  • Point 1: obtained for disclosure of the product-specific Type III EPD document. It can be downloaded at the following link and is valued as one whole product for purposes of credit achievement calculation.
  • Point 2: the multi-attribute optimization point can be obtained as a result of ArcelorMittal’s EPD showing an improvement over the industry average in the majority of the environmental impact categories. The industry average EPD for cladding roofing and deck is available for download at the following link.

Cold formed steel sections manufactured using ArcelorMittal steel products can also be used to obtain a disclosure point by downloading the SRI industry average EPD at the following link. This industry average EPD is valued as half (1/2) a product for purposes of credit achievement calculation.

The Corrugated Steel Pipe Institute EPD is available at the following link. This industry average EPD is also valued as half (1/2) a product for purposes of credit achievement calculation.

Sourcing Raw Materials

ArcelorMittal products can assist in obtaining the following two points under the sourcing of raw materials credit category.

  • Point 1: Our third party verified corporate sustainability report is available at the following link. The CSR report includes information on the environmental impacts of our mining operations and activities associated with our products supply chain. It was completed in accordance to the Global Reporting Initiative (GRI) framework. The report is valued as one whole product for credit achievement calculation.
  • Point 2: Recycled content. Our Recycled content letter is available at the following link. LEED recycled content is calculated as the sum of post-consumer recycled content plus one-half the pre-consumer recycled content, based on cost.

Construction Waste Management

Steel is a highly engineered product and due to off-site fabrication, ArcelorMittal steel products do not generate a large volume of construction waste. Steel is the most recycled material on the planet. Any steel retrieved from demolition can be easily recycled , greatly assisting in obtaining the credits below. Up to two points can be obtained by diverting or reducing construction and demolition waste:

Option 1 – Diversion

  • (1 point) Divert at least 50% of the total construction and demolition material; diverted materials must include at least three material streams.
  • (2 points) Divert at least 75% of the total construction and demolition material; diverted materials must include at least four material streams.

Option 2 – Reduction of total waste material

  • (2 points) Do not generate more than 2.5 pounds of construction waste per square foot (12.2 kilograms of waste per square meter) of the building’s floor area

Heat Island Reduction

The intent of this credit is minimize effects on microclimates, human and wildlife habitats by reducing heat islands. ArcelorMittal high reflectance roof products can assist in obtaining this credit by choosing one of the following options:

Option 1 – Non-roof and roof (2 points)

The combination of Non-roof Measures, ArcelorMittal High Reflectance Roof Products and Vegetated roof comply with the following formula:

Area of Non-roof Measures Area of High-Reflectance Roof Area of Vegetated Roof  
— — — —+— — — —+— — — —Total Site Paving Area +Total Roof Area
0.5 0.75 0.75  

A summary of ArcelorMittal high reflectance roof products that will help qualify for this credit can be found at the following link.

Option 2 – parking under cover (1 point)

Place a minimum of 75% of parking spaces under cover. ArcelorMittal high reflectance roof products found at the following link with an initial SRI of at least 39 at installation qualify for this credit.