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Scaffolding
Safety
D E PA R T M E N T O R D E R N O . 1 2 8
S e r i e s o f 2 0 1 3
A M E N D I N G R U L E 1 4 1 4 O N
S C A F F O L D I N G S O F T H E 1 9 8 9
O C C U PAT I O N A L H E A LT H A N D
S A F E T Y S TA N D A R D S
What is a scaffolding?
INTRODUCTION
It refers to a temporary or
movable platform supported on
the ground or suspended, used
for access and/or working at
considerable heights above
ground.
Working platform
Platform and walking passage
FUNCTIONS
OF A SCAFFOLDING
Classification of Scaffolds
⚬Supported Scaffolds
⚬Suspended Scaffolds
⚬Mobile
⚬Ladder
⚬Tube and coupler
⚬Frame
⚬Timber
Supported Scaffolds
⚬Bamboo
⚬Trestle
⚬Form and Carpenter’s
Bracket
⚬Roof Bracket
⚬Window Jack
Supported Scaffolds
⚬ Two-point adjustable
suspension
⚬ Single-point adjustable
suspension
Suspended Scaffolds
⚬ Design instruction shall be prepared by the end user.
⚬ Design shall be in accordance with recognized engineering principles.
⚬ Shall be designed with regard to ease and safety of erection and dismantling.
⚬ Supported scaffolds shall be capable of supporting without failure at least four (4)
times the maximum intended load, while suspended scaffolds shall have six (6)
times factor of safety.
⚬ All scaffolds designed by a structural engineer shall be approved by appropriate
authority.
DESIGN AND STABILITY
DESIGN
•Shall have vertical members(posts) diagonally and horizontally braced.
•No splices between the points of support of load carrying horizontal members and
secured to prevent lateral movement.
•The footing, sills or anchorage – sound, rigid, and capable of carrying twice the
maximum intended load.
•Posts shall rest on a foundation of sufficient size and strength to spread the load
from the posts.
•Any damaged or weakened scaffold members shall be immediately repaired,
replaced or discarded.
STRENGTH & STABILITY
DESIGN AND STABILITY
•Not be overloaded for which they are intended.
•Anchored or secured to permanent or rigid structures.
•Components produced by different manufacturers shall not be intermixed unless
the components fit together without force and the scaffold’s structural integrity is
maintained by the user.
•Front-end loaders and similar types of equipment shall not be used to support
scaffold platforms unless they have been specifically designed by the manufacturer
or such use.
STRENGTH & STABILITY
DESIGN AND STABILITY
•Must be inspected either upon delivery or before it is erected/installed.
•Any defective material shall be repaired, replaced or discarded.
•Lumber with two (2) nail holes aligned crosswise or four (4) nail holes
along its length shall not be used as horizontal load bearing member of
scaffold
INSPECTION OF SCAFFOLDS
•Check ground conditions, overhead wires, obstructions, changes in surface
elevation, and structural support.
• Ensure the following in site preparation:
• Soil are level and firm.
• Mud and soft soil are replaced with compacted gravel or crushed stone.
• On sloping grounds, the area where mudsills rest shall be leveled by
excavating rather than backfilling
SITE INSPECTION & PREPARATION
•Direct supervision of a competent/qualified person as the case may be.
•Maintained plumb regardless of connection.
•Conform to the designer’s specification.
•Runners shall be perpendicular to the posts. Spacing shall conform to the
designed scaffold.
•Diagonal braces shall extend from one connection to another.
•Diagonal braces shall not exceed an angle of 60deg from horizontal.
•Diagonal braces shall be installed immediately.
SCAFFOLD ERECTION
•All posts shall be joined or connected by means of joint pin, spigot or any
appropriate means of connections.
•Always maintain the base width to height ratio of 1:4 during installation for stability.
•No scaffold activity shall be undertaken if the wind velocity exceeds 48 kph.
•No work shall be allowed to commence below the scaffold.
•Working platform shall be provided per level during erection.
SCAFFOLD ERECTION
•Scaffolds of more than 6 meters in height shall be designed by a structural
engineer and shall be erected, installed and dismantled by TESDA certified
erectors.
•Scaffold shall be erected, added, altered or dismantled only under the supervision
of the competent/qualified person in the construction.
SCAFFOLD ERECTION
⚬ Performed by a qualified and competent person.
⚬ All manufactured scaffolds shall follow the manufacturers’ recommendations.
• Direct connections shall be evaluated by a qualified or competent person who
shall confirm.
• Inspections should be carried out daily and every shift.
INSPECTION & TAGGING
•Identification tags – solid green, yellow, or red color with black lettering.
•Tags shall be hanged in every scaffold access points.
■ Green tags – scaffolds access that have been inspected and are safe for use.
■ Yellow tags – special requirements for safe use are required and shall be closely
supervised.
■ Red “DANGER – UNSAFE FOR USE” tags – used when all green or yellow tags
has been removed.
All the records of the inspections shall be available on site and made available to
proper authority upon request.
INSPECTION & TAGGING
•Properly maintained, fixed and secured in position to prevent displacement.
•Not to be used unless it is rendered stable, strong and safe for the purpose.
•Left standing for four (4) months shall not be used until damaged members are
replaced.
MAINTENANCE DURING USE
⚬ Must be done by trained personnel.
⚬ Proceed in reverse order to its erection.
⚬ Workers should wear a safety harness and lanyard tied off to a secured anchor
before attempting to loosen stuck or jammed parts.
⚬ Do not hammer or pry apart the scaffold components.
⚬ Do not throw scaffold components.
SCAFFOLD DISMANTLING
•All scaffolds shall be properly maintained, kept, clean, and free of
damage.
• Accessories requiring lubrication shall be oiled prior to storage in a
covered or closed container, or as per manufacturer’s recommendation.
MAINTENANCE & STORAGE
BASIC CONSIDERATION
⚬The weight of workers, tools, materials and equipment to be carried by
the scaffold system.
⚬Site conditions
⚬Height to which the scaffold may be erected.
⚬Type of work that will be done from the scaffold.
SCAFFOLD AND TYPE SELECTIONS
SCAFFOLD AND TYPE SELECTIONS
BASIC CONSIDERATION
⚬Duration of work
⚬Weather conditions, including wind
⚬Requirements for pedestrian traffic through and under the scaffold area
⚬Means of access to the scaffold
⚬Configuration of the building or structure being worked on.
⚬Wind speed limit is 48kph (DO 128) and 40kph (International Practice)
SCAFFOLD AND TYPE SELECTIONS
SCAFFOLD CAPACITY
⚬Scaffolds must be capable of supporting its own weight and at least 4x the
expected load. Expected load includes Live Load + Dead Load.
SCAFFOLD LOAD RATINGS
⚬ The allowable working load of scaffolding is 3,450kg per leg [TESDA]
⚬ The allowable working load of scaffolding is 150 kg per sq. m [DO 128]
OVERLOADING
⚬ Most frequent violations in scaffold practice.
HOUSEKEEPING
⚬ Scaffold decks are usually small, narrow and confined. Debris and waste
materials should not be allowed to collect on the platform.
SAFETY
SAFE SCAFFOLD USE
⚬Do not use damaged parts that affect the strength of the scaffold.
⚬Do not allow employees to work on scaffolds when they are feeling weak, sick,
or dizzy.
⚬Do not work from any part of the scaffold other than the platform.
⚬Do not alter the scaffold.
⚬Do not move a scaffold horizontally while workers are on it, unless it is a mobile
scaffold and the proper procedures are followed.
⚬Do not put more weight on a scaffold than it is designed to hold.
SAFETY
SAFE SCAFFOLD USE
⚬Do not allow employees to work on scaffolds covered slippery materials.
⚬Do not erect, use, alter, or move scaffolds within 10 feet of overhead power
lines.
⚬Do not use shore or lean-to scaffolds.
⚬Do not swing loads near or on scaffolds unless you use a tag line.
⚬Do not work on scaffolds in bad weather or high winds unless the competent
person decides that doing so is safe.
⚬Do not let extra material build up on the platforms.
⚬Do not use ladders, boxes, barrels, or other makeshift contraptions to raise your
work height.
SAFETY
TRAINING & COMPETENCY
Competent Person - responsible for determining the feasibility and safety of providing
fall protection for personnel erecting, installing or dismantling scaffolds.
■ Must undergo the standard scaffold training and assessment prescribed by
DOLE and TESDA.
■ Training Certificate from DOLE or its accredited safety training organization.
■ Holder of TESDA prescribed Scaffold Erection Certificate.
■ At least 2 years experience in scaffold erection.
TRAINING & COMPETENCY
Scaffold Erector
■ Must undergo the standard scaffold training and assessment prescribed by
DOLE and TESDA.
■ One Day Workers Safety Orientation from DOLE or its accredited safety
training organization.
■ Must be a holder of TESDA prescribed Scaffold Erection NC II
END OF PRESENTATION

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DO 128 - 13 SCAFFOLDING SAFETY.pptx

  • 2. D E PA R T M E N T O R D E R N O . 1 2 8 S e r i e s o f 2 0 1 3 A M E N D I N G R U L E 1 4 1 4 O N S C A F F O L D I N G S O F T H E 1 9 8 9 O C C U PAT I O N A L H E A LT H A N D S A F E T Y S TA N D A R D S
  • 3. What is a scaffolding? INTRODUCTION It refers to a temporary or movable platform supported on the ground or suspended, used for access and/or working at considerable heights above ground.
  • 4. Working platform Platform and walking passage FUNCTIONS OF A SCAFFOLDING
  • 5. Classification of Scaffolds ⚬Supported Scaffolds ⚬Suspended Scaffolds
  • 7. ⚬Bamboo ⚬Trestle ⚬Form and Carpenter’s Bracket ⚬Roof Bracket ⚬Window Jack Supported Scaffolds
  • 8. ⚬ Two-point adjustable suspension ⚬ Single-point adjustable suspension Suspended Scaffolds
  • 9. ⚬ Design instruction shall be prepared by the end user. ⚬ Design shall be in accordance with recognized engineering principles. ⚬ Shall be designed with regard to ease and safety of erection and dismantling. ⚬ Supported scaffolds shall be capable of supporting without failure at least four (4) times the maximum intended load, while suspended scaffolds shall have six (6) times factor of safety. ⚬ All scaffolds designed by a structural engineer shall be approved by appropriate authority. DESIGN AND STABILITY DESIGN
  • 10. •Shall have vertical members(posts) diagonally and horizontally braced. •No splices between the points of support of load carrying horizontal members and secured to prevent lateral movement. •The footing, sills or anchorage – sound, rigid, and capable of carrying twice the maximum intended load. •Posts shall rest on a foundation of sufficient size and strength to spread the load from the posts. •Any damaged or weakened scaffold members shall be immediately repaired, replaced or discarded. STRENGTH & STABILITY DESIGN AND STABILITY
  • 11. •Not be overloaded for which they are intended. •Anchored or secured to permanent or rigid structures. •Components produced by different manufacturers shall not be intermixed unless the components fit together without force and the scaffold’s structural integrity is maintained by the user. •Front-end loaders and similar types of equipment shall not be used to support scaffold platforms unless they have been specifically designed by the manufacturer or such use. STRENGTH & STABILITY DESIGN AND STABILITY
  • 12. •Must be inspected either upon delivery or before it is erected/installed. •Any defective material shall be repaired, replaced or discarded. •Lumber with two (2) nail holes aligned crosswise or four (4) nail holes along its length shall not be used as horizontal load bearing member of scaffold INSPECTION OF SCAFFOLDS
  • 13. •Check ground conditions, overhead wires, obstructions, changes in surface elevation, and structural support. • Ensure the following in site preparation: • Soil are level and firm. • Mud and soft soil are replaced with compacted gravel or crushed stone. • On sloping grounds, the area where mudsills rest shall be leveled by excavating rather than backfilling SITE INSPECTION & PREPARATION
  • 14. •Direct supervision of a competent/qualified person as the case may be. •Maintained plumb regardless of connection. •Conform to the designer’s specification. •Runners shall be perpendicular to the posts. Spacing shall conform to the designed scaffold. •Diagonal braces shall extend from one connection to another. •Diagonal braces shall not exceed an angle of 60deg from horizontal. •Diagonal braces shall be installed immediately. SCAFFOLD ERECTION
  • 15. •All posts shall be joined or connected by means of joint pin, spigot or any appropriate means of connections. •Always maintain the base width to height ratio of 1:4 during installation for stability. •No scaffold activity shall be undertaken if the wind velocity exceeds 48 kph. •No work shall be allowed to commence below the scaffold. •Working platform shall be provided per level during erection. SCAFFOLD ERECTION
  • 16. •Scaffolds of more than 6 meters in height shall be designed by a structural engineer and shall be erected, installed and dismantled by TESDA certified erectors. •Scaffold shall be erected, added, altered or dismantled only under the supervision of the competent/qualified person in the construction. SCAFFOLD ERECTION
  • 17. ⚬ Performed by a qualified and competent person. ⚬ All manufactured scaffolds shall follow the manufacturers’ recommendations. • Direct connections shall be evaluated by a qualified or competent person who shall confirm. • Inspections should be carried out daily and every shift. INSPECTION & TAGGING
  • 18. •Identification tags – solid green, yellow, or red color with black lettering. •Tags shall be hanged in every scaffold access points. ■ Green tags – scaffolds access that have been inspected and are safe for use. ■ Yellow tags – special requirements for safe use are required and shall be closely supervised. ■ Red “DANGER – UNSAFE FOR USE” tags – used when all green or yellow tags has been removed. All the records of the inspections shall be available on site and made available to proper authority upon request. INSPECTION & TAGGING
  • 19. •Properly maintained, fixed and secured in position to prevent displacement. •Not to be used unless it is rendered stable, strong and safe for the purpose. •Left standing for four (4) months shall not be used until damaged members are replaced. MAINTENANCE DURING USE
  • 20. ⚬ Must be done by trained personnel. ⚬ Proceed in reverse order to its erection. ⚬ Workers should wear a safety harness and lanyard tied off to a secured anchor before attempting to loosen stuck or jammed parts. ⚬ Do not hammer or pry apart the scaffold components. ⚬ Do not throw scaffold components. SCAFFOLD DISMANTLING
  • 21. •All scaffolds shall be properly maintained, kept, clean, and free of damage. • Accessories requiring lubrication shall be oiled prior to storage in a covered or closed container, or as per manufacturer’s recommendation. MAINTENANCE & STORAGE
  • 22. BASIC CONSIDERATION ⚬The weight of workers, tools, materials and equipment to be carried by the scaffold system. ⚬Site conditions ⚬Height to which the scaffold may be erected. ⚬Type of work that will be done from the scaffold. SCAFFOLD AND TYPE SELECTIONS
  • 23. SCAFFOLD AND TYPE SELECTIONS BASIC CONSIDERATION ⚬Duration of work ⚬Weather conditions, including wind ⚬Requirements for pedestrian traffic through and under the scaffold area ⚬Means of access to the scaffold ⚬Configuration of the building or structure being worked on. ⚬Wind speed limit is 48kph (DO 128) and 40kph (International Practice)
  • 24. SCAFFOLD AND TYPE SELECTIONS SCAFFOLD CAPACITY ⚬Scaffolds must be capable of supporting its own weight and at least 4x the expected load. Expected load includes Live Load + Dead Load. SCAFFOLD LOAD RATINGS ⚬ The allowable working load of scaffolding is 3,450kg per leg [TESDA] ⚬ The allowable working load of scaffolding is 150 kg per sq. m [DO 128]
  • 25. OVERLOADING ⚬ Most frequent violations in scaffold practice. HOUSEKEEPING ⚬ Scaffold decks are usually small, narrow and confined. Debris and waste materials should not be allowed to collect on the platform. SAFETY
  • 26. SAFE SCAFFOLD USE ⚬Do not use damaged parts that affect the strength of the scaffold. ⚬Do not allow employees to work on scaffolds when they are feeling weak, sick, or dizzy. ⚬Do not work from any part of the scaffold other than the platform. ⚬Do not alter the scaffold. ⚬Do not move a scaffold horizontally while workers are on it, unless it is a mobile scaffold and the proper procedures are followed. ⚬Do not put more weight on a scaffold than it is designed to hold. SAFETY
  • 27. SAFE SCAFFOLD USE ⚬Do not allow employees to work on scaffolds covered slippery materials. ⚬Do not erect, use, alter, or move scaffolds within 10 feet of overhead power lines. ⚬Do not use shore or lean-to scaffolds. ⚬Do not swing loads near or on scaffolds unless you use a tag line. ⚬Do not work on scaffolds in bad weather or high winds unless the competent person decides that doing so is safe. ⚬Do not let extra material build up on the platforms. ⚬Do not use ladders, boxes, barrels, or other makeshift contraptions to raise your work height. SAFETY
  • 28. TRAINING & COMPETENCY Competent Person - responsible for determining the feasibility and safety of providing fall protection for personnel erecting, installing or dismantling scaffolds. ■ Must undergo the standard scaffold training and assessment prescribed by DOLE and TESDA. ■ Training Certificate from DOLE or its accredited safety training organization. ■ Holder of TESDA prescribed Scaffold Erection Certificate. ■ At least 2 years experience in scaffold erection.
  • 29. TRAINING & COMPETENCY Scaffold Erector ■ Must undergo the standard scaffold training and assessment prescribed by DOLE and TESDA. ■ One Day Workers Safety Orientation from DOLE or its accredited safety training organization. ■ Must be a holder of TESDA prescribed Scaffold Erection NC II

Editor's Notes

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