Fig 10: Mode of door arrangement at the hall and dimensions of hall space Path for wheelchair Path for 2 wheelchairs Path for 1 wheelchairs and 1 person Fig 11: Dimensions of various paths Fig 12: Width of direction changing corridor 5.5.2. At places where the corridor changes direction, the corridor must be 900mm wide, and if there is a door, the width thereof must be 1,200mm (see fig 12) Fig 13: Direct entrance way at right angle 5.5.3. Where in two sides of corridor there is wall edge, then the clearance width must be in accordance with regulation in clause 5.5.1. 5.5.4. Handrails in two sides of corridor must be at an elevation of 900mm. Rotating angle at deviation points is preferably arched wall face or right angled wall face. Where there is difference in elevation at the extremity of corridor and the end of corridor with floor surface or ground surface, it must be balustrade, shielding plate or shielding edge, and there is a need for installation of safety signpost. 5.5.5. Clearance dimensions for wheelchair moving in corridor are stipulated as follows: a) Direct, perpendicular entrance (see fig 13): clearance dimensions being : 1,200mm x 900 mm b) Parallel entrances (see fig 14) : clearance dimensions being 1,500mm x 800mm 5.5.6. On walking way, it is permitted that objects could be protruded by 100mm and installed at 600mm and over 2,000mm from floor surface (see fig. 15) Note: Handrails of staircase and sloping way are permitted to protrude at maximum 115mm. 5.5.7. Objects fastened on post such as advertisement posters, public telephone poles, letter boxes are permitted to protrude 300mm in each side and installed at an elevation of 600mm and over 2,000mm from the floor surface (see fig 16) Fig 14: Parallel entrances Fig 15: Permissible limit of protruding objects Fig 16: Permissible limit of protruding objects fastened on post 5.5.8. Where walkway has gradually lowered clearance height and less than 2,000mm, it is necessary to arrange shielding bars. Elevation for installing shielding bars is at least 700mm from floor surface (see fig 17) 5.6. Staircase, up and down steps. 5.6.1. Stair cases in collective residence are regulated as follows: - No use of arch shaped staircases, and spiralled ones; - Width of staircase aisle not less than 1,200mm; - Staircase surface being not slippery, and no square step toes. Fig 17: Clearance height gradually lowered - No use of hollowed out staircases - Handrails must be arranged continuously, at an elevation of 900mm. At the start and end points of staircase, handrail is prolonged by 300mm more. Details of handrail are regulated in article 5.12. - If the staircase being covered by carpet, it must be firmly fastened. The outer rim of carpet must be stuck on floor. The angle between step face and step body must not exceed 30 0 . The step toe must not be receding, thus entangling shoe caps or crutches. Note: For dwelling houses such as attached houses, villas if required, it is permissible for: - Use of arch- shaped staircase, spiralled staircase; - Width of stair aisle not less than 800mm. 5.6.2. Width of stair face must be not less than 300mm regarding in-door staircase, not less than 400mm regarding out-door staircase. Height of step must be not over 160mm regarding indoor staircase and not over 120mm regarding out-door staircase (see fig 18) Fig 18: Width of stair face and elevation of stair 5.6.3. Step toes are designed for not exceeding 25mm. If they protrude out of the step body, they must be curvilinear or round up (see fig 19) 5.6.4. Elevation of a flight must not be over 1,800mm, if not, landing must be arranged. Width of landing must not be less than 800mm. Distance between the upper side of handrail and the first stair face as well as the last sloping face must not be over 1,000mm by vertical direction (see fig 20) Fig 19: Stair step toes Fig 20: Dimensions of stair case Fig 21: Elevator in residences Fig 22: Fixed elevators Fig 23: Specialized devices Fig 24: Elevator devices at places with many steps 5.6.5. The staircase must be well lighted. The face of the fist step and last step of the staircase has a colour different from that of the floor. 5.6.6. Where residence is not equipped with lift, it is necessary to install a system of elevator (up and down) constituted by specialized equipment/ device fastened to balustrade or pulley (see fig 21, 22, 23, 24). At two sides of staircase a 900mm-high handrail is installed. 5.7. Lift 5.7.1. Best vertical transport solution for PWD is the lift. The functioning system of lift must be entirely automatic. Note: Where residence is not equipped with lift (or sloping way) it is necessary to arrange rooms for PWD at ground floor. 5.7.2. Safety requirement when installing and using electric lift is to comply with regulations in the standards TCVN 5744: 1993. Lift - Safety requirement in installation and use, and TCVN 6395: 1998. Electric lift. Safety requirement on construction and installation. 5.7.3.Lift must be arranged near staircase. Distance from lift to staircase is 2,4 m or more (see fig 25). 5.7.4. Lift door is opened laterally and clearance dimension after opening being not less than 900 mm. Depending on position of door, clearance dimensions in the interior of lift cabin are shown in regulations from table 2 and fig 26.