E-WS-4 STEEL - TWIN METAL FRAMES (min. 250mm between linings) Twin metal frames - min. 250mm between linings For use in lightweight steel frame houses and flats/apartments DETAIL INFORMATION Floor and Wall Combinations and Code for Sustainable Homes and EcoHomes credits Checklist Visual indicators of critical features you must get right Additional Information Please refer to the Robust Details Handbook for full details of the required construction SIGN IN / SIGN UP To download the online Handbook