Transcript USO, LIMPIEZA Y MANEJO DE MATERIALES

MATERIALS HANDLING
SUB-PART H 1926.250
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Introduction
This training information has been prepared by the Safety and Health Consultation
Program at Georgia Tech with the technical collaboration of Mr. Juán C. Rodriguez
and under the sponsorship of OSHA. Its content may be copied and distributed for
free. The only request made to the user is that Georgia Tech’s Safety and Health
Consultation Program be acknowledged as the source. All information contained in
this training is believed to be correct by the authors, but it is important to point out
that, this is not an official OSHA publication and has not been revised or approved
by OSHA. The user should be aware that the recommendations provided in this
training do not replace any OSHA standard or regulation.
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Atlanta, GA 30332-0837
Voice : (404) 407-7431
FAX : (404) 407-8275
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SUB-PART H
 General requirements for the storage of materials
 Usage of rigging equipment (slings, fastenings,
and attachments) for the moving of materials by
hoisting
 Disposal of waste materials (debris, scrap, rubbish)
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GENERAL REQUIREMENTS FOR STORAGE
 All materials should be stored in a secure and safe way to
prevent sliding, falling or collapse (take into account the
maximum safe load limits of the floors per square foot)
 Aisles and passageways shall be kept clear and in good
repair to provide for the free and safe movement of workers
and the operation of material handling equipment
 When a difference in road or working levels exist, the
employer shall ensure the safe movement of vehicles
between the two levels though the use of ramps, blocking,
or grading
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GENERAL REQUIREMENTS FOR STORAGE cont.
 Materials stored inside buildings under construction shall
not be placed within 6 feet of any hoist way or inside floor
openings
 Materials should not be stored within 10 feet of an exterior
wall that is being built, which does not extend above the
top of the material stored
 Each employee required to work on stored material in silos,
hoppers, tanks, and similar storage areas shall be equipped
with personal fall arrest equipment meeting the
requirements of subpart M of the construction standard
 Non-compatible materials shall be segregated in storage
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GENERAL REQUIREMENTS FOR STORAGE
cont.
 Bagged materials shall be stacked by:
 Stepping back the layers and cross-keying the bags at
least every 10 bags high, or
 Wrapping the stack with a strong plastic material to
prevent their falling
 Brick stacks shall not be more than 7 feet in height
 When a loose brick stack reaches a height of 4 feet, it
shall be tapered back 2 inches in every foot of height
above the 4-foot level
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GENERAL REQUIREMENTS FOR STORAGE
cont.
 When masonry blocks are stacked higher than 6 feet,
the stack shall be tapered back one-half block per tier
above the 6-foot level
 Any cylindrical material (such as poles, pipes, and
structural steel), unless raked, shall be stacked and
blocked so as to prevent its spreading or tilting
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GENERAL REQUIREMENTS FOR STORAGE
cont.
 LUMBER:
 Pieces of lumber previously used shall have all nails
withdrawn before stacking them
 Lumber shall be stacked on level and solidly supported
sills so that it remains in a stable and safe position
 Lumber piles shall not exceed 20 feet in height
 Pieces of lumber handled manually shall not be stacked
more than 16 feet high
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HOUSEKEEPING AND DISPOSAL OF
WASTE MATERIALS
 Storage areas shall be kept free from accumulation of
materials that constitute hazards such as:
 explosions,
 fire,
 tripping and falling of workers, and/or
 harboring pests
 Vegetation control measures should be exercised
when necessary
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INSPECTION OF RIGGING EQUIPMENT FOR
MATERIAL HANDLING
 In general :
 Rigging equipment shall be inspected:


Each day prior to use on each shift, and
As necessary during its use to ensure that it is safe
 Defective equipment shall be removed from service
 Shall not be loaded in excess of its recommended safe
working load (refer for tables tables H-1 thru H-20 of
subpart 1926.251 for specific rated capacities)
 Equipment shall be removed from the immediate work area
when not in use
 Special custom design grabs, hooks, clamps, or other lifting
accessories, for such units as prefabricated structures and
similar materials, shall be marked to indicate the safe working
loads and shall be proof-tested prior to use to 125% of their
rated load
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INSPECTION OF RIGGING EQUIPMENT FOR
MATERIAL HANDLING…cont
INSPECTIONS OF SLINGS AND ALL ATTACHMENTS:
 Sling and all attachments shall be inspected for damage
or defects by a competent person designated by the
employer each day before use
 Damaged or defective slings shall be immediately
removed from service
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ALLOY STEEL CHAINS
 Welded alloy steel chain slings shall have permanently
affixed durable identification stating: size, grade, rated
capacity, and sling manufacturer
 Any other additional attachment when used with this
type of chain (such as hooks, rings, or oblong links),
shall have a rated capacity at least equal to that of the
chain
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ALLOY STEEL CHAINS cont.
 Alloy Steel Chains:
 Shall be inspected at least once a year
 Shall have a rated capacity (working load limit) that
conforms to the values shown in table H – 1
 Should not be used with job or shop hooks and links,
or makeshift fasteners, formed from bolts, rods, or
other such attachments
 The employer shall make and maintain a record of
the most recent month in which each alloy steel
chain sling was thoroughly inspected, and shall
make such record available for examination
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WIRE ROPE
 Tables H-3 through H-14 shall be used to determine the safe
working loads of various sizes and classifications of improved
plow steel wire rope and wire rope slings with various types of
terminals
 Protruding ends of strands in splices on slings and bridles shall
be covered or blunted
 Wire rope shall not be secured by knots, except on haul back
lines on scrapers
 An eye splice made in any wire rope shall have at least three full
tucks.
 This requirement shall not operate to preclude the use of another
form of splice or connection if:


It can be shown to be as efficient, and
It is not otherwise prohibited
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WIRE ROPE cont.
 Must consist of one continuous piece except for eye
splices in the ends of wires
 Wire ropes shall not be used if, in any length of 8
diameters, the total number of visible broken wires
exceeds 10% of the total number of wires, or if the
rope shows other signs of excessive wear, corrosion,
or defect
 “Never saddle up a dead horse ”
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WIRE ROPE cont.
 Wire rope:
 Shall not be kinked or permanently bent
 Shall be protected from the sharp edges of its load
 Shall not be pulled from under a load resting on it
 Shock loading is prohibited
 Be aware of the safe operating temperatures
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SYNTHETIC WEBBING SLINGS (NYLON)
 Shall be marked or coded to show: name or trademark
of manufacturer, rated capacity for the type of hitch,
and type of material
 The manufacturer’s safe working load shall never be
exceeded
 If a red warning thread is visible, the sling must be
removed from service
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SYNTHETIC WEBBING SLINGS (NYLON)
cont.
 Shall never be used for hoisting materials with sharp
edges unless protective measures have been taken
 Shall not be used if there are visible defects are
observed due to:
 excessive operational temperatures,
 burns/charring from chemical products, or
 conditions such as punctures, tears, cuts or distortion of
fittings
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OTHER ATTACHMENTS
 Any other additional attachment (such as hooks,
rings, oblong links, etc.) shall be used following the
manufacturer’s recommendations and the OSHA
tables
 All parts to be used for hoisting materials shall have
a rated capacity at least equal or higher to that of
the part with the lowest rated capacity in the whole
assembly
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DISPOSAL OF WASTE MATERIALS
 All waste material shall be removed from the
immediate work area as the work progresses and
placed into waste containers
 An enclosed chute shall be used when materials are
dropped more than 20 feet to any point lying outside
the exterior walls of the building
 When debris is dropped through a hole in the floor
without the use of a chute, the area onto which the
material is dropped shall be completely enclosed with
barricades not less than 42" high and not less than 6
feet back from the projected edge of the opening above
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