ISO 4866:1990(E) Licensed copy:HALCROW GROUP LTD, 27/01/2009, Uncontrolled Copy, © <strong>BSI</strong> Category of structure ←Resistance to vibration decreas<strong>in</strong>g 1 2 3 4 5 6 7 8 Table A.1 — Categorization of structures accord<strong>in</strong>g to group of build<strong>in</strong>g Heavy <strong>in</strong>dustrial multi-storey build<strong>in</strong>gs, five to seven storeys high, <strong>in</strong>clud<strong>in</strong>g earthquake-resistant <strong>for</strong>ms Heavy structures, <strong>in</strong>clud<strong>in</strong>g bridges, <strong>for</strong>tresses, ramparts Timber frame, heavy, public build<strong>in</strong>gs, <strong>in</strong>clud<strong>in</strong>g earthquake-resistant <strong>for</strong>ms Group of build<strong>in</strong>g (see clause A.4) 1 2 Timber-frame, s<strong>in</strong>gle- <strong>and</strong> two-storey houses <strong>and</strong> build<strong>in</strong>gs of associated uses, with <strong>in</strong>fill<strong>in</strong>g <strong>and</strong>/or cladd<strong>in</strong>g, <strong>in</strong>clud<strong>in</strong>g “log cab<strong>in</strong>” k<strong>in</strong>ds, <strong>in</strong>clud<strong>in</strong>g earthquake-resistant <strong>for</strong>ms Fairly heavy multi-storey build<strong>in</strong>gs, used <strong>for</strong> medium warehous<strong>in</strong>g or as liv<strong>in</strong>g accommodation vary<strong>in</strong>g from five to seven storeys or more Four- to six-storey houses, <strong>and</strong> build<strong>in</strong>gs of associated urban uses, made with blockwork or brickwork, load-bear<strong>in</strong>g walls of heavier construction, <strong>in</strong>clud<strong>in</strong>g “stately homes” <strong>and</strong> small palace-style build<strong>in</strong>gs Two-storey houses <strong>and</strong> build<strong>in</strong>gs of associated uses, made of blockwork, brickwork or pis-à-terre, with timber floors <strong>and</strong> roof Stone- or brick-built towers, <strong>in</strong>clud<strong>in</strong>g earthquake-resistant <strong>for</strong>ms Lofty church, hall <strong>and</strong> similar stone- or brick-built, arched or “articulated” type structures, with or without vault<strong>in</strong>g, <strong>in</strong>clud<strong>in</strong>g arched smaller churches <strong>and</strong> similar build<strong>in</strong>gs Low heavily constructed “open” (i.e. non-cross-braced) frame church <strong>and</strong> barn type build<strong>in</strong>gs <strong>in</strong>clud<strong>in</strong>g stables, garages, low <strong>in</strong>dustrial build<strong>in</strong>gs, town halls, temples, mosques, <strong>and</strong> similar build<strong>in</strong>gs with fairly heavy timber roofs <strong>and</strong> floors Ru<strong>in</strong>s <strong>and</strong> near-ru<strong>in</strong>s <strong>and</strong> other build<strong>in</strong>gs, all <strong>in</strong> a delicate state All class 7 constructions of historical importance Two- <strong>and</strong> three-storey <strong>in</strong>dustrial, heavy-frame build<strong>in</strong>gs of re<strong>in</strong><strong>for</strong>ced concrete or structural steel, clad with sheet<strong>in</strong>g <strong>and</strong>/or <strong>in</strong>fill<strong>in</strong>g panels of blockwork, brickwork, or precast units, <strong>and</strong> with steel, pre-cast or <strong>in</strong> situ concrete floors Composite, structural steel <strong>and</strong> re<strong>in</strong><strong>for</strong>ced concrete heavy <strong>in</strong>dustrial build<strong>in</strong>gs Five- to n<strong>in</strong>e-storey (<strong>and</strong> more) blocks of flats, offices, hospitals, light-frame <strong>in</strong>dustrial build<strong>in</strong>gs of re<strong>in</strong><strong>for</strong>ced concrete or structural steel, with <strong>in</strong>fill<strong>in</strong>g panels of blockwork, brickwork, or precast units, not designed to resist earthquakes S<strong>in</strong>gle-storey moderately lightweight, open-type <strong>in</strong>dustrial build<strong>in</strong>gs, braced by <strong>in</strong>ternal cross walls, of steel or alum<strong>in</strong>ium or timber, or concrete-frame, with light, sheet-cladd<strong>in</strong>g, <strong>and</strong> light panel-<strong>in</strong>fill<strong>in</strong>g, <strong>in</strong>clud<strong>in</strong>g earthquake-resistant types Two-storey, domestic houses <strong>and</strong> build<strong>in</strong>gs of associated uses, constructed of re<strong>in</strong><strong>for</strong>ced blockwork, brickwork or precast units, <strong>and</strong> with re<strong>in</strong><strong>for</strong>ced floor <strong>and</strong> roof construction, or wholly of re<strong>in</strong><strong>for</strong>ced concrete or similar, all of earthquake-resistant types Four- to ten-storey domestic <strong>and</strong> similar build<strong>in</strong>gs, constructed ma<strong>in</strong>ly of lightweight load-bear<strong>in</strong>g blockwork <strong>and</strong> brickwork, calculated or uncalculated, braced mostly by <strong>in</strong>ternal walls of similar material, <strong>and</strong> by re<strong>in</strong><strong>for</strong>ced concrete, pre<strong>for</strong>med or <strong>in</strong> situ floors at least on every other storey. Two-storey domestic houses <strong>and</strong> build<strong>in</strong>gs of associated uses, <strong>in</strong>clud<strong>in</strong>g offices, constructed with walls of blockwork, brickwork, precast units, <strong>and</strong> with timber or precast or <strong>in</strong> situ floors <strong>and</strong> roof structures S<strong>in</strong>gle- <strong>and</strong> two-storey houses <strong>and</strong> build<strong>in</strong>gs of associated uses, made of lighter construction, us<strong>in</strong>g lightweight materials, pre-fabricated or <strong>in</strong> situ, separately or mixed 14 © <strong>BSI</strong> 01-1999
ISO 4866:1990(E) Table A.2 — Classification of build<strong>in</strong>gs accord<strong>in</strong>g to their resistance to vibration <strong>and</strong> the tolerance that can be accepted <strong>for</strong> vibrational effects Class of build<strong>in</strong>g a 1 A a Category of structure (see Table A.1) 1 2 3 4 5 6 7 8 Categories of foundations (capital letters) <strong>and</strong> types of soil (lower case letter) 2 A b A a A a A a 3 A b B a A b B a (see clause A.5 <strong>and</strong> clause A.6) A b A a A b 4 A c B b B b A c A c B a B b Licensed copy:HALCROW GROUP LTD, 27/01/2009, Uncontrolled Copy, © <strong>BSI</strong> ← Level of acceptable vibration decreas<strong>in</strong>g 5 B c A c B c B a 6 7 A f A d B d A f A e B e © <strong>BSI</strong> 01-1999 15 B b C a B c C b 8 B e C c 9 10 B f B f 11 C f C f C e B a 12 13 14 C d C e C f a High class number = high degree of protection required. C d C e C f B a B b C a B c C b B d C c B e C d C f A a A b B c C a B d C b C c
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