Horse Scaffolding

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Horse Scaffolding
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Horse Scaffolding

• Horse Scaffolding is a scaffold for light or
  medium duty work.
• It is scaffolding made up of "saw horses," which
  support a work platform.
• Horse Scaffolding is mainly used during Ship
  Construction and maintenance.
• Since new methods of ship construction have come
  about, it has greatly reduced the use of these
  scaffolds.

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OSHA Regulations

• 1915.71(g)(1) The minimum dimensions of lumber
  used in the construction of horses shall be in
  accordance with Table E-3 in 1915.118.
• 1915.71(g)(2) Horses constructed of materials
  other than lumber shall provide the strength,
  rigidity and security required of horses
  constructed of lumber.

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OSHA Cont.

• 1915.71(g)(3) The lateral spread of the legs
  shall be equal to not less than one-third of the
  height of the horse.
• 1915.71(g)(4) All horses shall be kept in good
  repair, and shall be properly secured when used
  in staging or in locations where they may be
  insecure.

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OSHA Cont.

• 1915.71(g)(5) Platform planking shall be in
  accordance with the requirements of paragraph (i)
  of this section.
• 1915.71(g)(6) Backrails and toeboards shall be in
  accordance with paragraph (j) of this section.

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OSHA Dimensions

• Table E-3 - Specifications for the Construction
  of Horses Height in feet Structural members
  1016Legs ................. 2 x 4 3 x 4 4 x 6
  Bearers or
  headers.... 2 x 6 2 x 8 4 x 6
  Crossbraces .......... 2 x 4 or 1 x 8 2 x 4
  2 x 6
  Longitudinal braces... 2 x 4 2 x 6 2 x
  6

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Procedures and Policies

• Scaffolds can not be more than 10 feet or two
  tiers in height, whichever of the two is less.
• When horses are made up in tiers each horse must
  be placed directly over the other horse in the
  tier below.
• The legs of each horse must be nailed down or
  otherwise secured to prevent displacement and
  each tier must be crossbraced.

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Procedure Cont.

• Maximum intended load - Light duty 25
  pounds/foot2
• Maximum intended load - Medium duty 50
  pounds/foot2
• Bearers - Light duty2 X 4 inches
• Bearers - Medium duty3 X 4 inches
• Legs 2 X 4 inches

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Procedures Cont.

• Longitudinal Braces Between the legs1 X 6 inches
• Gusset braces at the top of the legs1 X 8 inches
• Half diagonal braces2 X 4 inches
• Horses must not be spaced more than 8 feet apart
  for the light-duty loads, and not more than 5
  feet apart for medium-duty loads.

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Injuries

• Injuries due to horse scaffolding are mainly fall
  injuries.
• Since Horse scaffolding cant be higher then 10
  feet, serious injuries or fatality is slim to
  none.
• Could not find any serious injuries due to horse
  scaffolding or any data.

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Injuries

• Injuries due to horse scaffolding are mainly fall
  injuries.
• Since Horse scaffolding cant be higher then 10
  feet, serious injuries or fatality is slim to
  none.
• Could not find any serious injuries due to horse
  scaffolding or any data.

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Horse Scaffolding

• Horse scaffolding is not commonly used except for
  construction and repairs of boats.
• Can not be higher then 10 ft.
• Can not be more then 2 tiers high.
• Serious or fatal injuries are not commonly
  associated with horse scaffolding.