Page 125 - Building Regulation Design Guidelines - Architecture Book (Blue Code)

SEcTION: 14 ACCESS RAMPS REQUIREMENTS SEcTION: 14 ACCESS RAMPS REQUIREMENTS

14.1.6 For helical ramps, the minimum inner radius for a single lane 14.1.7 The floor of ramps shall be rough and treated in such a way as to
helical ramp shall be 6.0 meters; and 11.0 meters wide for outer prevent slipping. Corners of columns and walls adjacent thereto
radius. shall be covered with protective rubber angles.
For two ways where opposing traffic flows shall separated by 14.1.8 Ramps shall be provided with an adequately sized reflector
medium curb of at least 0.60 meter wide and 0.15 meter height, mirror, to improve visibility on curves, sharp turns and whenever
the driveway minimum width is 4.0 meter with minimum inner poor visibility occurrs.
radius of 1.0 meters. (figure -52)
14.1.9 Ramp grade transition and ramp break over angle are particular
methods of blending ramp grade to be relatively at flat floor level.
≥ 5.0 m It is recommended to use a transition slope, which is equal to half
of ramp grade. And for 8% slope ramp, the minimum transition
length is 2.4 meters and 3.5 meters for 10% slope. (figure -53)
R≥ 6.0 m
R≥ 11.0 m
Suspended Element
≥ 4.0 m
One-Way - Single Lane
≥4.0 m ≥ 0.6 m ≥ 2.4 m
R≥ 10.0 m ≥ 2.4 m *T
*R
Raised Curb *T

*L
*L
Two-way - Single Lane
Angle of
Approach
Slope ≤8%
Angle of
Departure

Ramp Break over Angle

*R% *T% *L (Minimum)
10 % 5 % 3.50 m
8 % 4 % 2.40 m

Figure-52 Helical Vehicle Ramp Slope & Dimesions Figure-53 Vehicle Ramp Grade Transition

*L = Transition Length / *T = Transition Slope / *R = Ramp Slope
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