| Work Method Statement: |
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Tilt-Up and
Pre-Cast Concrete Construction Work |
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| Activity |
What are the Hazards? |
What is the Risk? |
How are you going to Control the Hazard and minimise the risk of injury? |
Who is going to Monitor and |
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(What has the potential to
cause injury?) |
(From Risk Calculator - see below) |
A HAZARD MAY REQUIRE THE USE OF ONE OR MORE
CONTROL MEASURES - CROSS OUT/ DELETE CONTROL MEASURES NOT USED |
Review
it and How? |
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1. Only Certified
Riggers to be in charge of Trained Crews |
Name |
| Construction |
Collapse |
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| using Tilt-Up |
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2. Care should be taken with the Pre-Cast Elements in the
Handling, Transporting |
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and
Erection to ensure no harm occurs to the elements that may impact |
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| Concrete |
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Structural Soundness |
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3. Follow the Shop Drawings Strictly. Shop Drawing Details should include - |
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Concrete
Specifications; Lifting Inserts Specifications; Temporary Bracing/ |
Signature |
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Propping
Requirements; Any Special Requirements
ie: Colour, Cement Content & |
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Water/ Cement Ratio |
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4. Follow the
Documented Erection Sequence Strictly.
It should have the following |
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Considerations
- Site Limitations; Local Street Access; Delivery Sequence; |
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Transport Requirements
& Overhead Obstructions |
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5. Engineer to check
whole building at each stage during erection and under |
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in-service conditions |
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6. Personnel should
wear appropriate PPE and never be positioned to stand below |
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or work on an element that is leaning towards them. Ie:
For Face-lifted Wall |
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Panels, bracing inserts should be on the same face of the
Panel as the lifting |
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inserts. |
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7. Correct Anchors, Plate Brackets & Bracing Inserts to
be used as per |
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Manufacturers Instructions and should not be removed
without Authority |
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8. Specified (Test
Certificates Available) Lifting Inserts should be used as per |
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manufacturers instructions and positioned symmetrically
about the centre of gravity |
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across the width of the element to prevent element slewing
sideways during |
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erection.
Manufacturer's symbol or name, lifting capacity of insert & insert
length |
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should still be able
to be viewed |
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9. Restraint Systems
should withstand load as well as loads when the panel is up |
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to 5 degrees off
vertical |
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10. Each Element
should never have less than 2 temporary supports unless it is |
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an Approved Exception
Specified by the Design Engineer |
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11. Props Capacity
should be sufficient to resist eccentricity due to Loading on |
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One Side Only; Situation where the Element may bear on Only
Two Discrete |
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Points During
Erection; Construction Loads & Wind Loads |
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12. Elements are to remain braced or propped
until they are adequately |
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restrained or
incorporated into the final structure |
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13. Fixings must be designed to fail in a
ductile manner |
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14. Failure of a
single member should not lead to the complete collapse of the |
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structure.
Progressive Collapse is prevented by - providing adequate structural |
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strength & continuity of the structure & its
parts; alternative load paths that
cause |
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applied forces to be
safely transmitted through the structure |
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15. Joint materials
used should be sufficient to maintain -
alignment during |
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erection; accommodate tolerances and expected structural
movements; thermal & |
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shrinkage movement of elements; fire resistance level &
weather resistance. |
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Method (How) |
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16. Consider Extra
reinforcement at Openings and Temporary Support Points to |
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Control Cracking in
Elements |
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inspection |
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where required |
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17. A tool keyed locking pin should be on all
brace adjustment mechanisms to |
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prevent over extension
and unintentional dislodgement of locking pin |
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supervised |
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18. Check
Environmental Conditions are safe for erection ie: Wind & Seismic |
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Activity |
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competent |
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19. Post Warning signs where appropriate and if
necessary isolate public - eg. |
persons where |
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Use of Barricades,
etc. |
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required |
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| HOW TO USE
THIS RISK TABLE |
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RISK
RATING CALCULATOR |
Likelihood |
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Risk Rating |
Prioritisation |
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Consequence |
Very likely Could happen anytime |
Likely Could happen sometimes |
Unlikely Could happen, but only rarely |
Very Unlikely Could happen, but probably never
will |
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1 or 2 |
Action to rectify |
| Step 1: Identify potential hazards. |
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What injury/damage could it cause? |
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must be done |
| Step 2: Decide what the possible Consequence could
be |
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Death or permanent disability |
1 |
1 |
2 |
3 |
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immediately |
| Step 3: Decide How Likely? It is to happen |
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Long term illness or serious injury |
1 |
2 |
3 |
4 |
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3, 4 or 5 |
Consider |
| Step 4: Line up your choices in the table to get a
number |
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Medical attention & several days off work |
2 |
3 |
4 |
5 |
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control measure |
| Step 5: Use the Priority table (far right side) to
guide your next steps |
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First aid needed |
3 |
4 |
5 |
6 |
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as necessary |
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