20150300 - Drawings · OPW15/0169

Table A: ACCEPTABLE FORMS OF CONSTRUCTION
                                                                                                                    Description                                                                  R w + C tr (not less than)            Construction
Description                                                             R w + C tr (not less than)   Construction
                                                                                                                    Wall construction type: Autoclaved aerated concrete
Wall construction type: Masonry
                                                                                                                    75 mm thick autoclaved aerated concrete wall panel with:
Two leaves of 110 mm clay brick masonry with:                                                                       (a) a row of 64 mm steel studs at 600 mm centres, spaced 20 mm                50
(a) cavity not less than 50 mm between leaves; and                                                                        from the autoclaved aerated concrete wall panel; and
                                                                         50
(b) 50 mm thick glass wool insulation with a density of 11 kg/m3                                                    (b) 75 mm thick glass wool insulation with a density of 11 kg/m3
      or 50 mm thick polyester insulation with a density of 20 kg/m3                                                      positioned between studs; and
      in the cavity.                                                                                                (c) one layer of 10 mm moisture resistant plasterboard or 13 mm fire
                                                                                                                          protective grade plasterboard fixed to outside face of studs and
Two leaves of 110 mm clay brick masonry with—                                                                             outside face of autoclaved aerated concrete wall panel.
(a) cavity not less than 50 mm between leaves; and
                                                                         50                                         75 mm thick autoclaved aerated concrete wall panel with—
(b) 13 mm cement render on each outside face.
                                                                                                                     (a) a row of 64 mm steel studs at 600 mm centres, spaced 35 mm               50
                                                                                                                            from the autoclaved aerated concrete panel wall; and
                                                                                                                    (b) 28 mm metal furring channels fixed to the outside face of the
Single leaf of 110 mm clay brick masonry with—                                                                           autoclaved aerated concrete wall panel, with
(a) a row of 70 mm x 35 mm timber studs or 64 mm steel studs at                                                          50 mm thick polyester insulation with a density of
      600 mm centres, spaced 20 mm from the masonry wall; and            50                                              9 kg/m3 positioned between furring channels and one layer of 13
(b) 50 mm thick mineral insulation or glass wool insulation with a                                                       mm fire protective grade plasterboard fixed to furring channels;
      density of 11 kg/m3 positioned between studs; and                                                                  and
(c) one layer of 13 mm plasterboard fixed to outside face of studs                                                  (a) 105 mm thick glass wool insulation with a density of 7 kg/m3
      and outside face of masonry.                                                                                       positioned between studs; and
Single leaf of 90 mm clay brick masonry with—                                                                       (b) one layer of 13 mm fire protective grade plasterboard fixed to the
(a) a row of 70 mm x 35 mm timber studs or 64 mm steels studs at                                                         outside face of the studs.
      600 mm centres, spaced 20 mm from each face of the masonry         50
                                                                                                                    Two leaves of 75 mm autoclaved aerated concrete wall panel
      wall; and                                                                                                     with—                                                                         50
(b) 50 mm thick mineral insulation or glass wool insulation with a                                                  (a) a cavity not less than 30 mm between panels containing 50 mm
      density of 11 kg/m3 positioned between studs in each row; and                                                      glass wool insulation with a density of 11 kg/m3; and
(c) one layer of 13 mm plasterboard fixed to studs on each                                                          (b) one layer of 10 mm plasterboard fixed to outside face of each
      outside face.                                                                                                      panel.
Single leaf of 220 mm brick masonry with 13 mm cement render on
each face.
                                                                         50
                                                                                                                     Wall construction type: Timber and steel framing
Wall construction type: Concrete                                                                                     Two rows of 90 x 35 mm timber studs or two rows of 64 mm
150 mm thick plain off form concrete.                                                                                steels studs at 600 mm centres with—                                         50
                                                                                                                    (a) an air gap not less than 20 mm between the rows of studs; and
                                                                         50
200 mm thick concrete panel with one layer of 13 mm                                                                  (b) 50 mm thick glass wool insulation or 60 mm thick polyester
plasterboard or 13 mm cement render on each face.                                                                          insulation with a density of 11 kg/m3; positioned between
                                                                         50                                                one row of studs, and
                                                                                                                     (c) two layers of 13 mm fire protective grade plasterboard or one layer
100 mm thick concrete panel with—                                                                                          of 6 mm fibre cement sheet and one layer of 13 mm fire protective
(c) a row of 64 mm steel studs at 600 mm centres, spaced                                                                   grade plasterboard, fixed to outside face of studs.
     25 mm from the concrete panel; and                                  50
(d) 80 mm thick polyester insulation or 50 mm thick glass wool
     insulation with a density of 11 kg/m3, positioned between studs;
     and
(e) two layers of 13 mm plasterboard fixed to outside face of studs
                                                                                                                    Two rows of 64 mm steel studs at 600 mm centres with—
     and one layer of 13 mm plasterboard fixed to outside face of
                                                                                                                    (a) an air gap not less than 80 mm between the rows of studs; and             50
     concrete panel.
                                                                                                                    (b) 200 mm thick polyester insulation with a density of 14 kg
125 mm thick concrete panel with:                                                                                        kg/m3; positioned between studs; and
(c) a row of 64 mm steel studs at 600 mm centres, spaced                 50                                         (c) one layer of 13 mm fire-protective grade plasterboard and one
     20 mm from the concrete panel; and                                                                                  layer 13 mm plasterboard on one outside face and one layer of 13
(d) 70 mm polyester insulation with a density of 9 kg/m3, positioned                                                     mm fire-protective grade plasterboard on the other outside face.
     between studs; and
(e) one layer of 13 mm plasterboard fixed to the outside face of the
     studs.




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