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MBA Building Supplies www.mbastuds.com | 888.248.8076 Product This EPD represents light gauge steel framing and accessories manufactured at the following MBA Building Supplies locations:

Libertyville, Il Frackville, PA Rainbow City, AL Dallas, TX

Declared Unit 1 metric ton of cold formed light gauge steel framing and accessories. Results are also presented for one short ton of cold formed light gauge steel framing and accessories.

EPD Number and Period of Validity Beginning Date: August 1, 2016 – End Date: July 31, 2021 SCS-EPD-04103

Product Category Rule North American Product Category Rule for Designated Steel Construction Products. May 2015.

Program Operator SCS Global Services 2000 Powell Street, Ste. 600, Emeryville, CA 94608 +1.510.452.8000 | www.SCSglobalServices.com

Environmental Product Declaration MBA Building Supplies

2 © 2016 SCSglobalServices.com


Table of ContentsProduct and Company Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cover

Company Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Material Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Material Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Product Life Cycle Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Additional Environmental Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Life Cycle Assessment Stages and Reported Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Life Cycle Impact Assessment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Supporting Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

a

PCR review, was conducted byTom Gloria, PhD, Industrial Ecology Consultants (Review Chair)

Email: [email protected]

Approved: 8/1/2016 Valid until: 7/31/2021

Independent verification of the declaration and data, according to ISO 14025:2006 and ISO 21930:2007.

internal external

Third party verifierTom Gloria, PhD, Industrial Ecology Consultants

© 2016 SCSglobalServices.com 3


MBA Building Supplies

More than 25 years since its founding, MBA Building Supplies continues to uphold the values the Company was built on, a

sincere commitment to producing the highest quality products and providing the best service in the industry.

MBA manufactures light gauge steel framing and accessories. Our reputation has been built on a dedication to providing

only the highest quality framing products manufactured at or above industry standards.

Our primary focus is on providing outstanding service to our customers. We take great pride in our ability to fill a wide

variety of orders accurately, quickly and conveniently. Serving an industry in which schedule cannot be compromised,

MBA maintains the quickest response times in the business.

www.mbastuds.com | 888.248.8076

PRODUCT SCOPEMBA Building Supplies manufacturers light gauge steel framing and accessories for use in commercial and residential

construction.

Descriptions of the products represented by this EPD are shown in Table 1

Table 1a. Light Gauge Steel Framing and Accessory products included in the EPD.

Light Gauge Steel Framing Products Steel thickness Other dimensions

ProSTUD® drywall framing system

25 to 20 gauge Web widths include 1-5/8”, 2-1/2”, 3-1/2”, 3-5/8”, 4”, 5-1/2”, and 6” all with 1-1/4” flange

ProTRAK®drywall framing system 25 to 20 gauge 1”, 1-1/4”, 1-1/2”, 2”, 2-1/2”, and 3” leg.

Drywall Studs 25 to 20 gauge 1-5/8”, 2-1/2”, 3-1/2”, 3-5/8”, 4”, 5-1/2” and 6” member widths and have 1-1/4” flanges

Drywall Track 25 to 20 gauge 1-1/4”, 2” or 3” leg

Structural Studs 20 to 10 gauge Standard widths from 2-1/2” thru 16”. Flanges are available in 1-3/8”, 1-5/8”, 2”, 2-1/2”, 3” and 3-1/2”.

Structural Track 20 to 10 gauge Standard widths from 2-1/2” through 16”. Flanges are available in 1-3/8”, 1-5/8”, 2”, 2-1/2”, 3” and 3-1/2”.



MATERIAL COMPOSITION

Table 1b. Light Gauge Steel Framing and Accessory products included in the EPD.

Light Gauge Steel Framing Accessories Steel thickness Other dimensions

Furring Channel 25 to 18 gauge Furring channel is available in 7/8” and 1-1/2” heights. Bearing surface is 1-1/4”.

U-Channel 16 gauge Standard widths are 3/4”, 1-1/2”, 2” and 2-1/2” with 1/2” legs

Z-Furring 25 to 12 gauge 1”, 1-1/2”, 2” and 2-1/2” depths

Angles 25 to 10 gauge Various widths

Flat Strapping 25 to 10 gauge Various widths

CRC clip 20 and 16 gauge N/A

Jamb and Header System 20 to 12 gauge Available in standard sizes of 3 5/8", 6", and 8". Jamb and Header flanges can be 2 1/2", 3" or 3 1/2" leg sizes.

Resilient Channel 25 to 20 gauge 1-1/4" screw flanges

Web Stiffener 14 gauge Standard 4" web width

Light gauge steel framing can be used in a large number of building designs and applications, ranging from commercial to

residential applications, in buildings of many different sizes, designs, and locations. While the functions of these product

systems are for construction, the large number of applications means that a single functional unit cannot be clearly defined.

Accordingly, a declared unit is used, in lieu of a functional unit, as described in Table 2.

Table 2. Declared unit for light gauge steel framing and accessories, and the approximate density. Parameter Value, SI Units Value, US Customary Units

Declared Unit 1 metric ton 1 short ton

Density 7,850 kg/m3 490 lb/ft3

MATERIAL CONTENT

The approximate content of cold formed light gauge steel framing is shown below in Table 3.

Table 3. Material composition of light gauge steel framing and accessories. Material Percentage of Total Mass of Product

Carbon Steel 90% to 99%

Metallic Coating* 1% to 10%

*MBA Building Supplies produces light gauge steel framing and accessories with various metallic coatings. Metallic coatings may contain some of the following constituents: zinc, aluminum, nickel, iron, antimony, silicon, iron, cerium, lanthanum, and iron.

Cold-formed light gauge steel framing and accessories used inside the building envelope do not include materials or

substances which have any potential route of exposure to humans or flora/fauna in the environment.



PRODUCT LIFE CYCLE FLOW DIAGRAM The diagram below is a representation of the most significant contributions to the production of cold-formed light gauge steel

framing. This includes resource extraction, steelmaking, transport to MBA Building Supplies and product manufacture.

EAF Steelmaking

Steel Scrap Processing

Roll Forming of Steel

Production of Light Guage Steel Framing

Transport to Manufacturer

Construction Process Stage (A4-A5)

Use Stage (B1--B7)

End-of-Life Stage (C1--C4)

Reuse, Recovery, Recycling potential

Metallic Coating of Steel

BOF Steelmaking

Iron Ore Mining

Roll Forming of Steel

Metallic Coating of Steel

Raw Material Extraction and Processing (A1)

Transport to Manufacturer (A2)

Manufacturing (A3)

Benefits and Loads Beyondthe System Boundaries (D)



ADDITIONAL ENVIRONMENTAL INFORMATION MBA Building Supplies manufactures light gauge metal framing products for use in both non-structural and load bearing

applications. Steel framing is universally regarded for its recycled content composition, reclamation rate, and many other

energy saving and environmental quality improving attributes. MBA supports the increasing demand for sustainable green

buildings and recognizes the importance of steel framing towards reaching higher standards in environmentally and socially

responsible construction.

LEED v4 MR Credit: Construction and Demolition Waste Management

MBA metal framing products are 100% recyclable. Credits are awarded based on recycling and salvage rates of construction

and demolition materials. Retain waste hauling certificates for documentation of recycling rates. Additionally, MBA metal

framing can be cut to exact standards during the manufacturing process, significantly limiting total construction waste

LEED v4 MR Credit: Building Product Disclosure and Optimization - Sourcing of Raw Materials - Recycled Content

The steel used by MBA in the manufacturing of light gauge metal framing is produced in one of two furnace types: Basic

Oxygen Furnace (BOF) or Electric Arc Furnace (EAF). Each furnace type uses a different production method, resulting in

different levels of recycled content. Individual manufacturer recycled content statistics are not applicable because of the

open loop recycling capability that steel and iron industries enjoy, with available scrap typically going to the closest melting

furnace.

The Steel Recycling Institute has set the industry standard recycled content levels for steel originating in the BOF and EAF

processes. MBA metal framing products originate from an indeterminable mix of steel from these two furnace types. Basic Oxygen Furnace (BOF) Electric Arc Furnace (EAF)

Total Recycled Content 32.7% Total Recycled Content 93.3%

Post-Consumer Recycled Content 25.5% Post-Consumer Recycled Content 56.9%

Post-Industrial Recycled Content 6.8% Post-Industrial Recycled Content 31.4%

LEED v4 MR Credit: Building Product Disclosure and Optimization - Sourcing of Raw Materials - Regional Materials

The light gauge metal framing products provided by MBA for project sites are manufactured in multiple facilities

throughout the United States. To qualify for this credit, MBA’s facilities must be within 100 miles of the project site.

Additionally, the extraction point of the steel provided for the job site must also be within a 100 mile radius of the

sourced location.



LIFE CYCLE ASSESSMENT STAGES AND REPORTED INFORMATION The following life cycle stages are included: raw material extraction and steel production, transport to manufacturer,

manufacture of light gauge steel framing, and benefits and loads beyond the system boundary (reported in Module D).

The EPD does not cover life cycle stages for product use, building operation, and product disposal. Since this EPD does not

include product use, the reference service life (RSL) is not specified.

Module D represents the potential avoided production of primary steel as a result of the net steel scrap produced across

the product life cycle. The Module D calculation accounts for all steel scrap material flows entering or recovered from

the product system, including steel recovered at end-of-life, as well as the steel scrap generated during stud and track

manufacture.

To calculate the potential avoided burden resulting from the generation of steel scrap, a dataset representing steel scrap

was used. These data were calculated based upon the methodology in the World Steel Association LCA report, Appendix

10 (2011). The potential avoided burden per kilogram of product for a specific inventory flow, ABFLOW, was assessed using

Equation 1

Equation 1. The equation used to calculate ABFLOW, the potential avoided burden credit for a specific inventory flow per kilogram of product (LGS framing and accessories). RR is the recovery rate per kilogram of steel product; S is the amount of scrap used in the steelmaking process per kilogram of steel product; ScrapFLOW is the inventory flow per kilogram of steel scrap.

The total steel scrap recovery rates, and steel scrap inputs, per kilogram of product, are summarized in Table 4 for each LGS

framing product assessed at each manufacturing facility location.

Table 4. The recovery rate and total scrap input per kilogram of product for light gauge steel framing and accessories.

Product Structural Flat Non-Structural Flat Non-Structural EQ

Scrap from manufacture of product 0.021 0.021 0.022

RR (scrap recovery rate per kg product) 0.941 0.941 0.942

S (scrap input per kg product)

Rainbow City, AL 0.830 0.830 0.830

Libertyville, IL 0.888 0.887 0.888

Frackville, PA 0.810 0.809 0.810

Dallas, TX 0.807 0.807 0.807

RR-S

Rainbow City, AL 0.111 0.111 0.111

Libertyville, IL 0.054 0.054 0.054

Frackville, PA 0.132 0.132 0.132

Dallas, TX 0.135 0.135 0.135

ABFLOW = (RR-S) ScrapFLOW+



LIFE CYCLE IMPACT ASSESSMENT Results are reported according to the LCIA methodologies of Tool for the Reduction and Assessment of Chemical and

Other Environmental Impacts (TRACI version 2.1) or CML-IA version 4.1. There are impact categories which are not

addressed by this EPD, including impacts to biomes, habitat disruption, and human health.

Table 5. Results for the declared unit for light gauge steel framing and accessories.

PRODUCT STAGE

CREDITS AND BURDENS BEYOND

THE SYSTEM BOUNDARY

Raw Material Extraction / Processing

Transport to the

ManufacturerManufacturing

Reuse, Recovery, Recycling Potential

Impact Category

Category Indicator

Indicator Description Unit A1 A2 A3 D

Global warming [a]

Global Warming Potential

Global Warming Potential

(GWP)

ton CO2eq /ton [d]

1.9 5.6x10-2 4.9x10-2 -0.12

Ozone Depletion

[a]

Ozone Depletion Potential

Depletion potential of the stratospheric ozone layer

(ODP)

ton CFC-11eq/ ton [d] Negligible Negligible Negligible Negligible

Acidification of land and water

[a]

Acid Emissions

Acidification Potential of

soil and water (AP)

ton SO2 eq/ ton [d]

1.7x10-2 2.6x10-4 3.1x10-4 -2.0x10-4

Eutrophication (freshwater) [a]

Phosphorus and nitrogen

emissions

Eutrophication potential (EP)

ton N eq/ ton [d] 3.4x10-3 5.8x10-5 1.5x10-4 1.2x10-5

Photochemical Ozone Creation

[a]

Max. Pot. for Ozone Formation

Formation potential of

tropospheric ozone (POCP)

ton O3 eq/ ton [d]

0.14 6.0x10-3 2.1x10-3 -2.7x10-4

Depletion of abiotic resources

(elements) [b,c]

Aggregated Depletion

of Extracted Resources

Abiotic depletion

potential (ADP-elements)

for non-fossil resources

ton Sb eq/ ton [d] 1.6x10-4 1.8x10-7 1.3x10-8 8.9x10-8

Depletion of abiotic

resources (fossil)[b]

Fossil fuel consumption

Abiotic depletion potential

(ADP-fossil fuels) for fossil

resources

BTU/short ton

(MJ/metric ton) [e]

21,000,000 (25,000)

770,000 (890)

530,000 (610)

-1,100,000 (-1,200)

[a] Calculated using TRACI v2.1. [b] Calculated using CML-IA v4.1. [c] This indicator is based on assumptions regarding current reserves estimates. Users should use caution when interpreting results because there is insufficient information on which indicator is best for assessing the depletion of abiotic resources. [d] Results shown represent both short ton per short ton of steel product, and metric ton per metric ton of steel product (these values are equivalent). [e] Results shown represent US Customary (BTU per short ton of steel product) and SI (MJ per metric ton of steel product) units. SI units are shown using parenthesis.



Table 6. Results for resource use, wastes, and output flows for one ton of light gauge steel framing and accessories.

PRODUCT STAGE

CREDITS AND BURDENS BEYOND

THE SYSTEM BOUNDARY

Raw Material Extraction / Processing

Transport to the

ManufacturerManufacturing

Reuse, Recovery, Recycling Potential

Impact Category Unit A1 A2 A3 D

Use of renewable primary energy excluding renewable primary energy resources used as raw materials.

BTU/ short ton (MJ/metric ton)

[a]

810,000 (940)

4,800 (5.6)

7,400 (8.6)

2,400 (2.8)

Use of renewable primary energy resources used as raw materials - Negligible Negligible Negligible Negligible

Total use of renewable primary energy resources


[a]

810,000 (940)

4,800 (5.6)

7,400 (8.6)

2,400 (2.8)

Use of nonrenewable primary energy excluding nonrenewable primary energy resources used as raw materials


[a]

22,000,000 (26,000)

730,000 (850)

650,000 (750)

-1,100,000(-1,300)

Use of nonrenewable primary energy resources used as raw materials Negligible Negligible Negligible -

Total use of nonrenewable primary energy resources (primary energy and primary energy resources used as raw materials)


[a]

22,000,000 (26,000)

730,000 (850)

650,000 (750)

-1,100,000(-1,300)

Use of secondary materials ton/ton [b] 0.74 None None -

Use of renewable secondary fuels - Negligible Negligible Negligible Negligible

Use of nonrenewable secondary fuels - Negligible Negligible Negligible -

Net use of fresh water

Gallons/short ton

(m3/metric ton)[a]

Not available [c] - 310

(1.3)3.8

1.6x10-2

Nonhazardous waste disposed ton/ton [b] 0.10 3.9x10-2 1.5x10-2 0.18

Hazardous waste disposed ton/ton [b] 1.3x10-2 - - -

Radioactive Waste disposed ton/ton [b] 3.5x10-4 9.5x10-7 4.5x10-7 4.7x10-7

Components for re-use ton/ton [b] Negligible Negligible Negligible -

Materials for recycling ton/ton [b] Data not available None 0.021 -

Materials for energy recovery Negligible Negligible Negligible -

Exported energy Negligible Negligible Negligible -

[a] Results shown represent US Customary units per short ton of steel, and SI units per metric ton of steel. SI units are shown using parenthesis. [b] Results shown represent both short ton per short ton of steel, and metric ton per metric ton of steel (these values are equivalent). [c] Due to data quality issues, water use is not reported. This will be a focus area in future data collection efforts.



Disclaimer

This Environmental Product Declaration (EPD) conforms to ISO 14025, 14040, ISO 14044, and ISO 21930.

Scope of Results Reported: The PCR requires the reporting of a limited set of LCA metrics; therefore, there may be relevant

environmental impacts beyond those disclosed by this EPD. The EPD does not indicate that any environmental or social per-

formance benchmarks are met nor thresholds exceeded.

Accuracy of Results: This EPD has been developed in accordance with the PCR applicable for the identified product following

the principles, requirements and guidelines of the ISO 14040, ISO 14044, ISO 14025 and ISO 21930 standards. The results in

this EPD are estimations of potential impacts. The accuracy of results in different EPDs may vary as a result of value choices,

background data assumptions and quality of data collected.

Comparability: EPDs are not comparative assertions and are either not comparable or have limited comparability when they

cover different life cycle stages, are based on different product category rules or are missing relevant environmental impacts.

Such comparisons can be inaccurate, and could lead to the erroneous selection of materials or products which are

higher-impact, at least in some impact categories. Any comparison of EPDs shall be subject to the requirements of ISO 21930.

For comparison of EPDs which report different module scopes, such that one EPD includes Module D and the other does not,

the comparison shall only be made on the basis of Modules A1, A2, and A3. Additionally, when Module D is included in the

EPDs being compared, all EPDs must use the same methodology for calculation of Module D values.

Interpreting the Results in Module D: The values in Module D include a recognition of the benefits or impacts related to steel

recycling which occur at the end of the product’s service life. The rate of steel recycling and related processes will evolve over

time. The results included in Module D attempt to capture future benefits, or impacts, but are based on a methodology that

uses current industry-average data reflecting current processes.

SUPPORTING TECHNICAL INFORMATION

Allocation:

The LCA followed the allocation guidelines of ISO 14044 and the PCR. Co-products from steelmaking were allocated using

system expansion, as described in the World Steel Association LCA Methodology Report (2011). Net steel scrap, accounting

for scrap input to the product system and scrap generated from product manufacturers and at end-of-life, is modeled as a

potential avoided burden and is reported as Module D.

Limitations:

Data was sought from a North American steel mill, but was unavailable. A representative dataset for EAF steelmaking in Eu-

rope was used, and adapted for the LCA through use of a US regional electricity grid. The production of steel has an impor-

tant contribution to results, and this is a study limitation.

A portion of the coated steel coil is purchased through steel brokers, and the origin of the steel is unknown. A dataset from

the World Steel Association for North American hot-dip galvanized steel was used in the LCA to represent steel purchased

through brokers.



MBA provides LGS framing and accessories with a variety of metallic coating options, including: hot-dip galvanized, galfan,

galvannealed, galvalume, and acryzinc. Data were not available for all metallic coating options and the coating was modeled

using hot dip galvanization as a surrogate process. Data Sources The life cycle inventory (LCI) analysis was conducted using SimaPro 8.1 software, using a mix primary and secondary data

sources, summarized in Table 7. These inventory data sources were used to create results for each inventory flow relative

to the declared unit of one metric ton.

Table 7. Data sources used for the LCA.

Material Dataset Processing Dataset Publication Date

Product

Coated Steel master coil (EAF) Steel, electric, un- and low-alloyed, at plant/US1

Sheet rolling, steel {GLO}| market for | Alloc Rec3; Zinc coat, coils {GLO} | market for | Alloc rec3

2011; 2014; 2014

Coated Steel master coil (BOF or EAF)

Worldsteel Data - Hot Dip Galvanized Steel, North America2

Included in datasets 2011

Lubricants Lubricating oil {GLO} | market for | Alloc Rec3

2014

Packaging

Wood packaging Wood pallet (22kg)3 Included in dataset 2012

Plastic packagingPackaging film, low density polyethylene {GLO} | market for |Alloc Rec3

Included in dataset 2014

Steel banding Worldsteel Data - Hot Dip Galvanized Steel 2

Included in dataset 2015

Resource Use

Electricity use

The dataset represents the supply mix of electricity for eGRID power subregions, representing the locations of LGS framing manufacturers. These datasets use the energy generation mix and 7% transmission losses recorded by the U.S. EIA in Electric Power Monthly for April 2013

NA 2015

Propane

Propane, burned in building machine {GLO} | Propane, burned in building machine | Alloc Rec3

NA 2014

Transportation

TruckTransport, freight, lorry 16-32 metric ton, EURO4 {GLO}| market for | Alloc Rec3

NA 2014

[1] Developed from Ecoinvent v2.2 Life Cycle Database modified for product displacement [2] Worldsteel Association Life Cycle Data for North American HDG steel [3] Ecoinvent v3.1 Life Cycle Database NA is not applicable



Table 8. Data quality assessment of Life Cycle Inventory.

Data Quality Parameter Data Quality Discussion

Time-Related Coverage: Age of data and the minimum length of time over which data is collected

Manufacturer-supplied data (primary data) are based on 2014 & 2015 annual production. Representative datasets (secondary data) used for upstream and background processes are generally less than 10 years old (typically 2007 or more recent). All of the data used represented an average of at least one year’s worth of data collection, and up to three years in some cases.

Geographical Coverage: Geographical area from which data for unit processes is collected to satisfy the goal of the study

The data used in the analysis provide the best possible representation available with current data. Actual processes for upstream operations are primarily North American. Surrogate data used in the assessment are representative of North American or European operations. Data representative of European operations are considered sufficiently similar to actual processes.

Technology Coverage: Specific technology or technology mix

For the most part, data are representative of the actual technologies used for processing, transportation, and manufacturing operations.

Precision: Measure of the variability of the data values for each data expressed

Precision of results are not quantified due to a lack of data. Data collected for operations were typically averaged for one or more years and over multiple operations, which is expected to reduce the variability of results.

Completeness: Percentage of flow that is measured or estimated

The LCA model included all known mass and energy flows for production of the LGS framing products. In some instances, surrogate data used to represent upstream and downstream operations may be missing some data which is propagated in the model. No known processes or activities contributing to more than 1% of the total environmental impact for each indicator are excluded. In total, these missing data represent less than 5% of the mass or energy flows.

Representativeness: Qualitative assessment of the degree to which the data set reflects the true population of interest.

Data used in the assessment represent typical or average processes as currently reported from multiple data sources, and are therefore generally representative of the range of actual processes and technologies for production of these materials. Considerable deviation may exist among actual processes on a site-specific basis; however, such a determination would require detailed data collection throughout the supply chain back to resource extraction.

Consistency: Qualitative assessment of whether the study methodology is applied uniformly to the various components of the analysis.

The consistency of the assessment is considered to be high. Data sources of similar quality and age are used; with a bias towards Ecoinvent data where available. Different portions of the product life cycle are equally considered; however, it must be noted that final disposition of the product is based on assumptions of current average practices in the United States.

Reproducibility: Qualitative assessment of the extent to which information about the methodology and data values would allow an independent practitioner to reproduce the results reported in the study.

Based on the description of data and assumptions used, this assessment would be reproducible by other practitioners. All assumptions, models, and data sources are documented.

Sources of the data: Description of all primary and secondary data sources.

Data representing energy use at the manufacturer’s facilities represent an annual average and are considered of high quality due to the length of time over which these data are collected, as compared to a snapshot that may not accurately reflect fluctuations in production. For secondary LCI datasets Ecoinvent data are used.

Uncertainty of the information: Uncertainty related to data, models, and assumptions

Uncertainty related to the product materials and packaging is low. Data for upstream operations relied upon use of existing representative datasets. These datasets contained relatively recent data (<10 years), but lacked geographical representativeness. Uncertainty related to the impact assessment methods used in the study are high. The impact assessment method required by the PCR includes impact potentials, which lack characterization of providing and receiving environments or tipping points.



REFERENCES:1. Final Draft Report: Life Cycle Assessment of Light Gauge Steel Framing and Accessories. Prepared for MBA Building

Supplies. SCS Global Services. July 2016.

2. North American Product Category Rule for Designated Steel Construction Products. SCS Global Services. Version 1.0.

May 2015.

3. ISO 14025:2006 Environmental labels and declarations – Type III environmental declarations – Principles and

Procedures.

4. ISO 14044: 2006 Environmental Management – Life cycle assessment – Requirements and Guidelines.

5. ISO 21930: 2007 Sustainability in building construction – Environmental declaration of building products.

6. EN 15804:2012+A1:2013. Sustainability of construction works – Environmental product declarations – Core rules for

the product category of construction products. 2013.

7. SCS Type III Environmental Declaration Program: Program Operator Manual v7.0. October 2015. SCS Global Services.

8. Tool for the Reduction and Assessment of Chemical and Other Environmental Impacts (TRACI). 2.1, V1.0. US EPA,

National Risk Management Research Laboratory, 2012.

9. CML-IA Characterization Factors v4.1. Leiden University, Institute of Environmental Sciences. October 2012.

10. US Life-Cycle Inventory Database http://www.nrel.gov/lci/

11. World Steel Association. Life Cycle Assessment Methodology Report. Life Cycle Inventory Study for Steel Products.

2011. ISBN 978-2-930069-66-1

©2016 SCS Global Services

SCS Global Services2000 Powell Street, Suite 600, Emeryville, CA 94608 USA

main +1.510.452.8000 | fax +1.510.452.8001

For more information contact:

MBA Building Supplies www.mbastuds.com | 888.248.8076

Libertyville, IL

2200 Tempel Drive Libertyville, IL 60048

Frackville, PA 100 Fireman’s Road Frackville, PA 17931

Rainbow City, AL 1217 West Grand Avenue Rainbow City, AL 35906

Dallas, TX 10880 Bekay Street

Dallas, TX 75238

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