Green Building Council of Australia and Green Star ratings for steel. Steel Credit Review

Transcription

1 Green Building Council of Australia and Green Star ratings for steel Steel Credit Review

2 Market Drivers Public opinion is driving a demand for environmental products, services and employment. Companies now seek an environmental profile. Environmental ratings for buildings is now a selection criteria for high profile tenants. A premium is obtainable for this. Environmental Rating Systems for buildings drive choice.

3 What is Green Star Certification? Green Star Certification Application to have their project rated using an appropriate Green Star rating tool. These tools typically cover nine categories Eg Management, indoor environment, energy, transport, water, materials, land use, emissions, innovation Green Building Council rates buildings from 4 Star (Best Practice) to 6 Star (World Leader).

4 The Steel Industry and Green Star Background No points had been available to structural steel through Green Star s steel credit in the material category, Mat - 6 A minimum 60% recycled content was required to get 1 point and 90% for 2 points. Compliance difficulties meant few projects sought to use the structural steel credit The existing point scheme could drive perverse The existing point scheme could drive perverse outcomes.

5 The Steel Industry and Green Star Af formal materials review process instigated by GBCA. aimed to: Replace/modify recycled content credit within MAT-5 and MAT-6 Develop a more workable compliance process for practitioners and suppliers

6 Outcomes Mandatory provisions include membership of the World Steel Climate Action Program and ISO14001 certification for major steel manufacturing facilities Credit Criteria ( 2 points) STRUCTURAL To encourage dematerialisation and demountability To encourage downstream steel stewardship REINFORCING Best practice tensile strength together with an energy reducing production method Off site reinforcing steel optimization process.

7 Why This Change..? Waste / Sustainability hierarchy. h Reduce - Best Reuse - Better Recycle - Good Change in Green Star ratings tool moves emphasis to Reducing steel tonnages, rather than focusing on Recycling

8 Compliance Criteria Sourcing of Steel Building must source 95% of the steel via a Steel Manufacturer who Has valid ISO Environmental Management System (EMS) in place Is a member of World Steel Association s Climate Action Program (CAP) Benefits of the Compliance Criteria: Eliminates unsustainable practices p Improves future practices

9 Compliance Criteria OneSteel & BlueScope Steel meet both compliance criteria ISO EMS WSA Climate Action Program WSA Certification available via web - worldsteel.org O i O St l & Or via OneSteel & BlueScope Steel websites

10 Green Star Credit Points New criteria differentiates between a steel or concrete framed building. Steel Building if > 60% structural steel (by mass) Concrete Building if > 60 % reinforcing steel (by mass) If not > 60% structural or reinforcing steel, any 2 of 4 points can be sought Steel Building 2 points available 1 point: Using a greater proportion of higher strength structural steel 1 point: Using a proportion of fabricated steel via an accredited supply chain Concrete Building 2 points available 1 point: Using reinforcing i steel derived d using Polymer Injection Technology 1 point: Using a proportion of reinforcing steel manufactured using off site optimal fabrication techniques. Only a maximum of 2 points can be awarded

11 Structural Steel Credit Points Predominantly steel framed building 2 points available via: Higher Strength Steel ASI Environmental Sustainability Charter

12 Higher Strength Steel Credit Point One point awarded if the building utilises 95% Category A product and 25% Category B product. Category A - Minimum 95% by weight Roof & wall sheeting Strength Grade 550 Category B - Minimum 25% by weight Hot rolled structurals Strength Grade 350 Profiled steel decking 550 Hot rolled plate 350 Purlins & Girts 450 Cold formed & hollow sections 450 Light steel framing 450 Welded Sections 400 Promotes reduction in steel consumption through design solutions utilising higher strength materials available in the Australian market Cat B material must be grade marked by the fabricator

13 Higher Strength Steel Credit Point Design opportunities using higher vs standard grade steel Typical 4 level office + roof, 2,000 sq.m / floor, total framing steel = 600 t 120 t - Decking, purlins, roof sheeting (Category A) 400 t - Structural Steel frame, (Category B) 140 t of which is designed using higher grade steel 80 t - Reinforcing steel in the composite slab. (Reinforcing) Structural Steel or Concrete framed building? Structural Steel > 60% of total steel, so use Structural Steel criteria To achieve 1 point, need to satisfy 2 requirements 95% ( 114 t ) of deck, purlins, roof sheeting meets required grade 25 % requirement for Category B steel ( 140t / 400t = 35% ), thus OK Design awarded 1 point via higher strength steel criteria

14 Higher Strength Steel Credit Point Design opportunities using higher vs standard grade steel Comparative (retrospective) preliminary designs done on office building: 300 PLUS Grade 350 Saving Primary beam, 8.4m: 610UB UB % Secondary Beam, 12.6m: 460UB75 460UB67 10 % Overall saving in mass of all floor beams of 8.5% Opportunities to save section depth/mass by using higher strength steel: Tension members Columns, especially shorter &/or more heavily loaded columns Primary beams & some Secondary beams Members governed by serviceability criteria unlikely to benefit

15

16

17

18 ASI ESC Credit Point Australian Steel Institute Environmental Sustainability Charter One point awarded if; One point awarded if; 60% of fabricated structural steelwork is supplied by a Chartered Member

19 Reinforcing Steel Credit Points Predominantly concrete framed building 2 points for: Polymer Injection Technology Off-site Optimal Fabrication Techniques

20 Polymer Injection Technology 1 point awarded if: Credit Point 95% reinforcing steel 500MPa and 60% reo made using Polymer Injection Technology process Polymers (derived from tyres & plastic bottles) used as carbon source Promotes reduction & diversion of materials destined for land fill Promotes reduced electricity consumption in EAF Steel Mills Numerous reinforcing suppliers in Australian market utilising this Steel Making

21 Off-Site Optimal Fabrication Technique Credit Point 1 point awarded if: 15% steel produced using off site optimal fabrication techniques Examples include: Bamtec Carpets Custom / Engineered Meshes Prefabricated Cages Promotes efficiencies derived through; Variable & specific bar spacing Reduced laps Reduced wastage on-site Off site Optimal fabrication techniques are designed to provide significant savings in the amount of reinforcing steel used on a project.

22 Achieving Green Star Points Design Stage Utilise a proportion of higher strength structural steels in a structural steel framed building Utilise a proportion of custom designed mesh, reinforcing carpets &/or prefabricated cages in a concrete framed building Supply Chain Seek out steel fabricators, distributors & steelwork contractors who are accredited to the ASI s Environmental Sustainability Charter Seek out suppliers who supply reinforcing manufactured using Polymer Injection Technology or other approved methods.

23 More information? Green Buildings Council of Australia com au World Steel Association Australian Steel Institute for Charter members OneSteel l t BlueScope Steel for weight calculator on Cat. A products BlueScope Steel Direct Ph

24 ASI Environmental Sustainability Charter The ASI Environmental Sustainability Charter What it entails Companies committed to the ESC are those that run their businesses along sustainable lines, demonstrate environmental responsibility, and share their knowledge of sustainability with others. This commitment is audited once yearly by an independent auditor

25 10 Requirements ENVIRONMENTAL PROCEDURES 1. Signed sustainability Policy 2. Fully legislative compliant 3. Operating an EMS 4. Measured consumables and target reductions 5. Independent audits 6. Measured carbon footprint 7. Promote environmental subcontracting 8. Environmental process improvement 9. Management of fuel and vehicle use 10. Engagement with the local community

26 Identification /sustainability for the ESC List

27 Summary of Steel Credit Impacts 1. Workable 2. Affects whole supply chain not tjust steel producers 3. Allows design smarts to achieve a point 4. Relates to reinforced steel as well as structural steel 5. Applies to the full range of buildings. Schools, hospitals, industrial, i shopping centres, commercial high h rise etc

28 Quote The examination of the lifecycle of steel, as one of the key building materials, has produced a revised Steel credit which rewards best practice within industry; the role of any rating tool is to stimulate behavioural change and be a driver for positive change in the market. Robin Mellon Robin Mellon Executive Director Green Star