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width and heigth in any one flight.
The sum of the height of the two risers and the width of one tread shall be not less
than 160 millimeters nor more than660 millimeters.
Temporary stairways shall be not less than 915 millimeters wide.
Landings shall be not less than 762 millimeters long. No flight of stairs of a
temporary stairways shall have a vertical rise in excess of 3.60 meters. Whenever
necessary intermediate landings shall be provided.
4.6.11 Temporary and permanent stairways shall be adequately lighted, as set forth in
Section 3.5 of this Rule.
4.6.12 Permanent stairs that are to be used during construction and on which treads are to
be filled in later shall have wooden treads firmly fitted in lace for the full area of
the tread. The top surfaces of the temporary trads shall be maintained above the tops of the
risers or nosings.
4.6.13 No door shall open directly onto a flight of stairs, but a landing equal to at least
the width of the door shall be provided between the door and the stairs.
Temporary doors higher than 1.35 meters shall be fitted with wire glass panels.
4.7 Runways and Ramps
4.7.1 4.7.2 Runways and ramps shall have a slope not steeper than one in three. The roral
rise of a runway or ramp between landings shall not exceed 3.60 meters. 4.7.3 When the rise is steeper than on in six, or when the rise is more than 1.8 meters
and steeper than on in eight, runways or ramps shall be provided with cleats
spaced not more than 200 millimeters apart. 4.7.4 4.8 Runways and ramps used in connection with scaffolds or extending from story to
story or otherwise located and maintained for an extended period of time or for
the transfer of bulky material shall be constructed of at least three 250 millimeter
planks laid closely side by side and substantially supported and braced to preven
unequal deflection and springing action. Runways and ramps having a total rise of more than 1.80 meters, or passing over
or near floor openings, high tension wires or other dangerous places, shall be
provided with guard rails and toe boards. Scaffolds
4.8.1 Properly constructed scaffolds shall be provided for all work which cannot be
done safely by workmen standing on permanent or solid construction, except
when such work can be done safely from ladders. All such scaffolds shall be
substantially constructed to support at least four times the maximum load, and
shall be secured to prevent swaying. 4.8.2 Planks used in the construction of stationary scaffolds shall be not less than 50
mm. nominal thickness. Where such planks overlap at the ends, the overlap shall
be not less than 150 mm. Planks shall be so placed that they cannot tip under the
weight of the worker at any point. Nails used in the construction of scaffolds shall
be of ample size and length to carry the loads they are intended to support. All
nails shall be driven full strength. No nails shall be subject to direct pull. 4.8.3 Ropes, cables and blocks used in the support of swinging sc...
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This note was uploaded on 09/22/2013 for the course ARIDBE AR taught by Professor Any during the Fall '12 term at Mapúa Institute of Technology.
- Fall '12