AS 1428.1-2009 PWD Code

AS 1428.1—2009                                         24



              (iii)     A wall not less than 450 mm in height.
       (b)    Walkways shall be provided with landings, as specified in Clause 10.8, at
              intervals not exceeding the following:
              (i)       For walkway gradients of 1 in 33, at intervals no greater than 25 m.
              (ii)      For walkway gradients of 1 in 20, at intervals no greater than 15 m.
              (iii)     For walkway gradients between 1 in 20 to 1 in 33, at intervals that shall
                        be obtained by linear interpolation.
              For walkways shallower than 1 in 33, no landings are required.
              The intervals specified above may be increased by 30% where at least one
              side of a walkway is bounded by—
              (A)    a kerb or kerb rail as specified in Clause 10.3(j) and a handrail as
              specified in Clause 12; or
              (B)        a wall and a handrail as specified in Clause 12.
       10.3 Ramps
       Ramps shall comply with the following:
       (a)    The maximum gradient of a ramp exceeding 1900 mm in length shall be
              1 in 14.
       (b)    The gradient of a ramp shall be constant throughout its length with a maximum
              allowable tolerance of 3% provided no section of the ramp is steeper than
              1 in 14.
       (c)    Ramps shall be provided with landings, as specified in Clause 10.8, at the
              bottom and at the top of the ramp and at intervals not exceeding the following:
              (i)       For ramp gradients of 1 in 14, at intervals not greater than 9 m.
              (ii)      For ramp gradients steeper than 1 in 20, at intervals not greater than
                        15 m.
              (iii)     For ramp gradients between 1 in 14 and steeper than 1 in 20, at intervals
                        that shall be obtained by linear interpolation.
       (d)    Where ramps are constructed with a change in direction, the angle of
              approach shall create a 90° angle to the line of transition between the ramp
              surface and the landing surface, as shown in Figure 13.
       (e)    Ramps shall have a handrail complying with Clause 12 on each side of the
              ramp, as shown in Figure 14.
              NOTE: Figures 15(A)       and   15(B)   show   examples   of   suitable   ramp   handrail
              terminations.
       (f)    Where the intersection is at the property boundary, the ramp shall be set back
              by a minimum of 900 mm so that the handrail (complying with Clause 12) and
              TGSIs do not protrude into the transverse path, as shown in Figure 16.
              TGSIs shall be installed in accordance with AS 1428.4.1.
       (g)    Where the intersection is at an internal corridor, the ramp shall be set back by
              a minimum of 400 mm so that the handrail complying with Clause 12 does not
              protrude into the transverse path of travel as shown in Figure 17.
       (h)    The handrail shall extend a minimum of 300 mm horizontally past the
              transition point at the top and bottom of the ramp except where the inner
              handrail is continuous at an intermediate landing.

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