Subpart D Test
Circle the appropriate answer and locate appropriate standard
Question
An opening in the floor is considered a hole when it is
more than 24 in.
True
False
Stairway openings do not need fall protection.
True
False
Railings in Subpart D must withstand 800 lbs. thrust in
any direction.
True
False
The vertical posts of railings must be at 20 ft. centers.
True
False
Fixed stairs must have a minimum width of 22 in.
True
False
Standard
1910.21(a)(1)
1910.23(a)(1)
1910.23(e)(3)(iv)
1910.23(e)(3)(i) & (ii) & (iii)
1910.24(d)
Part 1910 Subpart D - WalkingWorking Surfaces
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1910.21 - Definitions.
1910.22 - General requirements.
1910.23 - Guarding floor and wall openings and holes.
1910.24 - Fixed industrial stairs.
1910.25 - Portable wood ladders.
1910.26 - Portable metal ladders.
1910.27 - Fixed ladders.
1910.28 - Safety requirements for scaffolding.
1910.29 - Manually propelled mobile ladder stands and
scaffolds (towers).
• 1910.30 - Other working surfaces.
Subpart D - Walking/Working
Surfaces (1910.21 - 32)
23(c)(1) Open sided Floors - 640
22(a)(1) Housekeeping - 198
22(a)(1) Wet Floors - 139
24(h)
Stair rails - 93
23(a)(8) Floor holes - 86
Number of Serious Violations - FY 98
1910.21(a)(1) & (a)(2) - Floor hole vs floor
opening
Floor Covering
1910.22(a)(1)
Housekeeping
1910.22(a)(1)
All places of employment, passageways, storerooms,
service rooms shall be kept clean and orderly and in a
sanitary condition.
Debris on floor
Housekeeping
1910.22(a)(2) - Floors
Where wet processes are
used, keep floors clean
and dry as possible
1910.22(a)(3) - Protruding nails
1910.22(b) - Aisles and passageways
(1) Safe clearances; clean and good repair; no obstacles in aisles
where mechanical handling equipment is used.
(2) Aisles and passageways shall be permanently marked
1910.22(d) - Floor loading protection
(1) Loads approved by building official shall be marked.
1910.22(d) (continued)
(1) Signs shall be marked & affixed in conspicuous place
(2) Unlawful to overload
1910.23 - Guarding floor and wall openings
and holes
1910.23(a)- Protection for floor openings
(1) Every stairway floor opening shall be guarded by a standard
railing constructed in accordance with paragraph (e) of this section.
Guard Rail System
Top Rail
Mid Rail
Toe Board
Types of materials
1910.23(a)(2) - Ladderway floor openings, platforms Guarded by standard railing, toeboard
1910.23(a)(3) Hatchway/chute floor opening
Guarded by hinged cover or removable railing/toeboard
1910.23(a)(4) Skylight floor opening
Guarded by standard skylight screen/or fixed standard railing
Protected sky light
1910.23(a)(6) Manhole floor opening - Guarded by standard
manhole cover
1910.23(a)(8) Floor hole opening - Guarded by standard
railing/cover
1910.23(a)(8)(ii) - Floor hole opening
1910.23(b) - Wall openings/holes
(1) Drop greater than 4’ shall be guarded
1910.23(c)(1)
Open sided floors, platforms and runways
Work platform
Work platform
Elevated runway
Runway
Unguarded
Adequate platform guardrail
What’s the problem here?
No toe board
What’s up with this???
1910.23(c)(3) Adjacent to dangerous equipment
(regardless of height) - Guarded by standard railing
with toeboard
Open screw auger directly underneath
1910.23(d) Stairway railings and guards
1910.23(d)(1) Stairway railings and guards
4 or more risers require standard stair railings or handrails
1910.23(d)(1)(i) Stairways less than 44” wide - At least
one handrail
1910.23(d)(1)(ii) Less than 44” wide with one
open side - At least one railing on open side
1910.23(d)(1)(iii)
Less than 44” wide with both open sides - Stair railing on
each side
What’s wrong with this picture?
1910.23 (e)(3)(iv)
The anchoring of posts and framing of members for railings of
all types - Capable of withstanding a load of at least 200
pounds applied in any direction at any point on the top rail.
1910.24 - Fixed
Industrial Stairs
1910.24(c) Stair strength
Must carry 5 times normal live
load anticipated, but never less
than 1000 pounds moving
concentrated load
1910.24(d) Minimum Stair Width of 22”
1910.24(e) Angle of Stairway Rise “Table D-1”
Table D-1
___________________________________________________________________
|
|
Angle to horizontal | Rise (in inches) | Tread run (in inches)
_________________________ |__________________|______________________
|
|
30 deg. 35'...............|
6 1/2 |
11
32 deg. 08'...............|
6 3/4 |
10 3/4
33 deg. 41'...............|
7|
10 1/2
35 deg. 16'...............|
7 1/4 |
10 1/4
36 deg. 52'...............|
7 1/2 |
10
38 deg. 29'...............|
7 3/4 |
9 3/4
40 deg. 08'...............|
8|
9 1/2
41 deg. 44'...............|
8 1/4 |
9 1/4
43 deg. 22'...............|
8 1/2 |
9
45 deg. 00'...............|
8 3/4 |
8 3/4
46 deg. 38'...............|
9|
8 1/2
48 deg. 16'...............|
9 1/4 |
8 1/4
49 deg. 54'...............|
9 1/2 |
8
__________________________|__________________|______________________
1910.24(h) Standard railing
on open sides of all exposed
stairways and stair
platforms
Hand rails provided on at
least one side of closed
stairways
1910.24(i) Vertical clearance
above stair tread to
overhead obstruction - At
least 7 feet