Whole Building Design Guide Federal Green Construction Guide for Specifiers This is a guidance document with sample specification language intended to be inserted into project specifications on this subject as appropriate to the agency s environmental goals Certain provisions where indicated are required for U S federal agency projects Sample specification language is numbered to clearly distinguish it from advisory or discussion material Each sample is preceded by identification of the typical location in a specification section where TM it would appear using the SectionFormat of the Construction Specifications Institute SECTION 05050 BASIC METAL MATERIALS AND METHODS SPECIFIER NOTE resource management Mining raw materials iron limestone coal can produce soil erosion pollutant runoff and habitat loss Ore refinement produces heat combustion emissions and requires significant amounts of water Supply of some of the raw materials nickel chromium and manganese is very limited The iron and steel industry sector has multi media impacts including air emissions CO SOx NOx PM2 wastewater contaminants hazardous and solid wastes As an industry minimills are the largest U S consumers of recycled steel scrap but also face issues related to contaminants in scrap products Refer to the Steel Recycling Institute SRI www recycle steel org The energy used by minimills generates greenhouse gas emissions from power generation An emerging trend to generate heat on site by burning carbon may improve energy efficiency but may also increase emissions Refer to http www epa gov sectors ironsteel index html EPA partnerships have addressed environmental impacts from metal finishing refer to http www epa gov sectors metalfinishing index html and from die casting refer to http www epa gov sectors metalcasting index html Aluminum is fabricated from bauxite a mineral found primarily in tropical areas A significant factor in the clear cutting of tropical rainforests is the desire to gain access to bauxite mines Aluminum is extensively recycled from both post industrial sources such as stamping offal and head butt and edge trim from rolling or extrusion operations and post consumer sources such as used beverage cans scrapped automobiles and end of life building products Mass produced aluminum is a relatively young building material This fact coupled with the long life of aluminum building components means that aluminum is only beginning to be recycled from building applications To produce aluminum from recycled material requires only 5 percent of the energy and greenhouse gas emissions required to produce aluminum from bauxite ore and each ton of recycled aluminum saves 4 tons of bauxite In addition using recycled aluminum instead of raw materials reduces the generation of air pollution such SOx and NOx by 95 percent and water pollution by 97 percent About one third of the aluminum used in the United States comes from recycled material with post consumer scrap contributing about 40 percent of that total toxicity IEQ Metal is considered inert Factory applied finishes emit considerably less VOCs in situ than field applied coatings because the primary outgassing occurs at the plant under controlled conditions performance Performance is comparable for green methods and standard methods Where feasible use mechanical connections to allow for deconstruction and reuse PART 1 GENERAL 1 1 SUMMARY A This Section includes 1 Steel 2 Aluminum 3 Copper http fedgreenspecs wbdg org 11 02 05 05050 1 Basic Metal Materials and Methods Whole Building Design Guide Federal Green Construction Guide for Specifiers 4 1 2 xxxx SUBMITTALS A Product data Unless otherwise indicated submit the following for each type of product provided under work of this Section SPECIFIER NOTE Green building rating systems often include credit for materials of recycled content USGBC LEED v2 2 for example includes credit for materials with recycled content calculated on the basis of preconsumer and post consumer percentage content and it includes credit for use of salvaged recovered materials Green Globes US also provides points for reused building materials and components and for building materials with recycled content 1 Recycled Content a Indicate recycled content indicate percentage of pre consumer and postconsumer recycled content per unit of product b Indicate relative dollar value of recycled content product to total dollar value of product included in project c If recycled content product is part of an assembly indicate the percentage of recycled content product in the assembly by weight d If recycled content product is part of an assembly indicate relative dollar value of recycled content product to total dollar value of assembly SPECIFIER NOTE Specifying local materials may help minimize transportation impacts however it may not have a significant impact on reducing the overall embodied energy of a building material because of efficiencies of scale in some modes of transportation Green building rating systems frequently include credit for local materials Transportation impacts include fossil fuel consumption air pollution and labor USGBC LEED v2 2 includes credits for materials extracted harvested and manufactured within a 500 mile radius from the project site Green Globes US also provides points for materials that are locally manufactured 2 Local Regional Materials a Sourcing location s Indicate location of extraction harvesting and recovery indicate distance between extraction harvesting and recovery and the project site b Manufacturing location s Indicate location of manufacturing facility indicate distance between manufacturing facility and the project site c Product Value Indicate dollar value of product containing local regional materials include materials cost only d Product Component s Value Where product components are sourced or manufactured in separate locations provide location information for each component Indicate the percentage by weight of each component per unit of product PART 2 PRODUCTS 2 1 MATERIALS A Steel SPECIFIER NOTE US EPA Comprehensive Procurement Guidelines CPG discusses steel manufactured in either a Basic Oxygen Furnace BOF or an Electric Arc Furnace EAF Steel from the BDF process contains 25 30 percent total recovered materials of which 16 percent is post consumer steel Steel from the EAF process contains a total of 100 percent recovered steel of which 67 percent is post consumer Recommendations for recycled content
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