2006 New York Code - Pole Scaffolds.

 
    § 27-1043 Pole scaffolds. (a) Poles. Scaffold poles shall be plumb and
  the  foot  ends  shall  be  secured against lateral movement. Where wood
  poles are spliced, the squared end  of  the  upper  section  shall  bear
  uniformly  on  the  squared  end  of the lower section, and the two ends
  shall be rigidly fastened together with two or more wood splice  plates,
  each  at  least four feet in length. The plates shall be placed at right
  angles to each other, shall  overlap  the  abutting  ends  of  the  pole
  equally,  and  shall  have a combined sectional area not less than fifty
  per cent of the cross sectional area of the pole. Splicing  of  adjacent
  poles  shall  be  staggered.  Splices  shall be close to ledgers, but so
  located as not to interfere with the fastenings.
    (b) Bracing. Pole scaffolds shall be  braced  and  stayed  to  prevent
  movement away from the building. Diagonal or equivalent bracing shall be
  provided to prevent the poles from moving in a direction parallel to the
  building  face,  and shall be so installed that every spliced section of
  every pole is braced to adjacent poles.
    (c) Planking.
    (1) Where planks are butted end to end, parallel  putlogs  or  bearers
  shall  be  provided not more than eight inches apart so that butted ends
  rest on separate putlogs or bearers. Ends shall be nailed or cleated.
    (2) Where platform planks are used with overlapping ends, the ends  of
  both  the upper and lower planks shall overlap the putlog or bearer by a
  least six inches.
    (3) Planks shall be laid close together and  shall  be  of  sufficient
  length to extend over three bearers.
    (d) Connections.
    (1)  Ledgers  shall not be spliced between poles but shall overlap the
  poles at each end by at least four inches. Where ledgers lap each other,
  bearing-blocks attached to the pole shall be  provided  to  support  the
  ledger.
    (2) The ends of all wooden braces shall overlap the nail fastenings an
  amount sufficient to prevent the ends of the braces from splitting.
    (e)  Putlogs  for single pole scaffolds. All putlogs shall be set with
  the greater dimension vertical and  shall  be  long  enough  to  project
  beyond  the  outer  edge of the poles by at least twelve inches. Putlogs
  shall be supported on the ledger and located against  the  side  of  the
  poles  and  fastened  to either the pole or the ledger. The other end of
  the putlog shall rest in the wall of the building, with  at  least  four
  inch  bearing,  and  shall  not be notched or cut down, except for light
  duty scaffolds, which may be notched or cut down to  fit  into  a  space
  made  by  the removal of a brick. In such cases, the notch shall be made
  on the top of the putlog just deep enough to permit it to be inserted in
  the hole in the wall.
    (f) Bearers for independent pole scaffolds. Bearers shall be set  with
  their  greater  dimensions vertical, and shall be long enough to project
  over the ledgers beyond the outer row of poles by at least twelve inches
  and beyond the inner row of poles by at least two inches. Bearers  shall
  be  supported on the ledgers, and located against the sides of the poles
  and fastened to them.
    (g) Free standing scaffolds. Unless  guyed,  free  standing  scaffolds
  shall  have  a minimum base dimension of at least twenty-five percent of
  the height of the scaffold.
    (h) Erection and removal. When a new working  level  is  desired,  the
  existing planks shall be left undisturbed until the new working level is
  framed.  As  the  platform  level  is abandoned with the progress of the
  work, all members other than the planking, railing, and toeboards  shall
  be  left  intact. When removing a scaffold, the sequence of removing the
  members shall be the reverse of that used in erection.


    (i) Standard designs. All wood pole scaffolds seventy-five  feet  high
  or  less  shall  be  constructed  in accordance with the minimum nominal
  sizes and maximum spacings shown in tables 19-6 through 19-11. For  pole
  scaffolds  more  than  seventy-five  feet  high,  see  paragraph  one of
  subdivision (b) of section 27-1042 of this article.
 
    Table 19-6 Minimum size and maximum spacing of members of single pole
                            light duty scaffolds.
  ========================================================================
  Uniformly Distributed Load                        Not to Exceed 25 psf
  ------------------------------------------------------------------------
  Max. height of scaffold..........  20'   40'    60'        75'
  .................................                    Top 60' Lower Sect.
  Poles or uprights (min.)......... 2"x4" 3"x4"  4"x4"  4"x4"    4"x6"
  Pole foundation (min.)...........              2"x9"
  Max. pole spacing (longitudi-
    nal)...........................             10'-0"
  Max. width of scaffold...........              5'-0"
  Bearers or putlogs (min.)........       3"x4" or 2"x6(on edge)
  Ledgers (minimum):
    With 6'-0" pole space..........              1"x6" (on edge)
    With 10'-0" pole space.........             1 1/4"x(on edge)
  Vertical spacing of ledgers
  (max.)...........................              7'-0"
  Non-supporting stringers.........              1"x4"
  Tie-ins..........................              1"x4"
  Bracing..........................              1"x4"
  Planking:
    Not more than 6' span..........            1 1/4"x9"
    Up to 10' span.................              2"x9"
  Toeboards........................              1"x6"
  Guard rails......................              2"x4"
  ========================================================================
 
     Table 19-7 Minimum size and maximum spacing members of single pole
                           medium duty scaffolds.
  ========================================================================
  Uniformly Distributed Load                        Not to Exceed 50 psf
  ------------------------------------------------------------------------
  Max. height of scaffold..........  20'   40'    60'        75'
  .................................                    Top 60' Lower Sect.
  ................................. 3"x4"
  Poles or uprights (min.).........  or   4"x4"  4"x6"  4"x6"    4"x6"
  ................................. 2"x6"
  Pole foundation (min.)...........              2"x9"
  Max. pole spacing (longitudi-
    nal)...........................              8'-0"
  Max. width of scaffold...........       5'-0"        8'-0"
  Bearers or putlogs (min.)........ 3"x4" or 2"x8"     3"x5" or 2"x9"
  .................................   (on edge)         (on edge)
  Max. spacing of bearers or
    putlogs........................              8'x0"
  Ledgers (minimum):...............              2"x9"  (on edge)
  Vertical spacing of ledgers
  (max.)...........................              7'-0"
  Non-supporting stringers.........             1"x6" or 1 1/4"
  Tie-ins..........................              1"x6"
  Bracing..........................              1"x6"


  Planking:
    Not more than 6' span..........            1 1/4"x9"
    Up to 8' span..................              2"x9"
  Toeboards........................              2"x9"
  Guard rails......................              2"x4"
  ========================================================================
 
    Table 19-8 Minimum size and maximum spacing of members of single pole
                            heavy duty scaffolds.
  ========================================================================
  Uniformly Distributed Load                        Not to Exceed 75 psf
  ------------------------------------------------------------------------
  Max. height of scaffold..........  20'   40'    60'        75'
  .................................                    Top 60' Lower Sect.
  ................................. 3"x4"
  Poles or uprights (min.).........  or   4"x4"  4"x6"  4"x6"    6"x6"
  ................................. 2"x6"
  Pole foundation (min.)...........              2"x9"
  Max. pole spacing (longitudi-
    nal)...........................              6'-0"
  Max. width of scaffold...........       5'-0"        8'-0"
  Bearers or putlogs (min.)........       3"x5         3"x6" or 2"x9"
  Max. spacing of bearers or
    putlogs........................              6'x0"
  Ledgers (minimum):...............              2"x9" (on edge)
  Vertical spacing of ledgers
  (max.)...........................              7'-0"
  Non-supporting stringers.........              2"x4"
  Tie-ins..........................              1"x6"
  Bracing..........................              1"x6"
  Planking:........................              2"x9"
  Toeboards........................              2"x9"
  Guard rails......................              2"x4"
  ========================================================================
 
    Table 19-9 Minimum size and maximum spacing of members of independent
                         pole light duty scaffolds.
  ========================================================================
  Uniformly Distributed Load                        Not to Exceed 25 psf
  ------------------------------------------------------------------------
  Max. height of scaffold..........  20'   40'    60'        75'
  .................................                    Top 60' Lower Sect.
  .................................       3"x4"
  Poles or uprights (min.)......... 2"x4"  or    4"x4"  4"x4"  4"x6"
  .................................       2"x6"
  Pole foundation (min.)...........              2"x9"
  Max. pole spacing (longitudi-
    nal):
    With 1 1/4"x9" ledgers.........              6'-0"
    With 2"x9".....................             10'-0"
  Max. pole spacing (transverse)...             10'-0"a
  Ledgers (minimum):...............          1 1/4"x9" (on edge)
  .................................           or
  .................................         2"x9"
  Vertical spacing of ledgers
  (max.)...........................              7'-0"
  Bearers (minimum)................          1 1/4"x9" (on edge)
  Non-supporting stringers.........              1"x4"


  Bracing..........................              1"x4"
  Planking:
    Not more than 6' span..........          1 1/4"x9"
    Up to 10' span.................              2"x9"
  Toeboards........................              1"x6"
  Guard rails......................              2"x4"
  ========================================================================
 
    Note--a.    Total  base dimension in both directions to be at least 25
  percent of height.
 
  Table 19-10 Minimum size and maximum spacing members of independent pole
                           medium duty scaffolds.
  ========================================================================
  Uniformly Distributed Load                        Not to Exceed 50 psf
  ------------------------------------------------------------------------
  Max. height of scaffold..........  20'   40'    60'        75'
  .................................                    Top 60' Lower Sect.
  ................................. 3"x4"
  Poles or uprights (min.).........  or   4"x4"  4"x6"  4"x6"    6"x6"
  ................................. 2"x6"
  Pole foundation (min.)...........              2"x9"
  Max. pole spacing (transverse)...             10'-0"a
  Ledgers (minimum):...............              2"x9"  (on edge)
  Vertical spacing of ledgers
  (max.)...........................              6'-0"
  Non-supporting stringers.........             1 1/4"x4" or 1"x6"
  Bearers (minimum)................              2"x9"  (on edge)
  Bracing..........................              1"x6"
  Planking:
    Not more than 6' span..........            1 1/4"x9"
    Up to 6' span..................              2"x9"
  Toeboards........................              2"x9"
  Guard rails......................              2"x4"
  ========================================================================
    Note--a.  Total base dimension in both directions to be  at  least  25
  percent of height.
 
   Table 19-11 Minimum size and maximum spacing of members of independent
                         pole heavy duty scaffolds.
  ========================================================================
  Uniformly Distributed Load                        Not to Exceed 75 psf
  ------------------------------------------------------------------------
  Max. height of scaffold..........  20'   40'    60'        75'
  .................................                    Top 60' Lower Sect.
  Poles or uprights (min.)......... 4"x4" 4"x4"  4"x6"  4"x6"    6"x6"
  Pole foundation (min.)...........              2"x9"
  Max. pole spacing (longitudi-
    nal)...........................              6'-0"a
  Max. pole spacing (transverse)...             10'-0"a
  Ledgers (minimum):...............              2"x9" (on edge)
  Vertical spacing of ledgers
  (max.)...........................              5'-0"
  Bearers (minimum)................              2"x9" (on edge)
  Non-supporting stringers.........             1 1/4"x9"
  Bracing..........................              1"x6"
  Planking:........................              2"x9"


  Toeboards........................              2"x9"
  Guard rails......................              2"x4"
  ========================================================================
    Note--a. Total  base  dimension  in  both directions to be at least 25
  percent of height.