Thursday, 4 October 2012
Replacing Manhole
Common defects
The manhole getting old and rusting though.
Using the wrong type of manhole, such as using a light duty one where lorries are going to be passing over it.
Common materials used
metal manhole
cement
possible limitations in materials
bent frames
missing components
using the wrong manhole.
Identify power tools, tools and materials.
Shovel
Hard brush
Soft brush
Dustpan
Brick trowel
Tape measure
2 buckets
Broom
Bin
Manhole frame
Manhole
Cement
57 Dale Drive, Patcham, Brighton BN1 8MY
TEL: 01273 506843 Mob: 07654323765 Fax: 0161 728 3172
METHOD STATEMENT
Client: - Brighton Council
Item:- Replacing a manhole
Date:- 04/10/2012
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Description of the Works
This work requires us to replace a manhole with a heavy duty manhole as the lightweight one is breaking due to the regular pressure of large vehicles such as busses and lorries.
Method
1. Gain any permits to work, and put signs up a week before to give people notice part of London road will be closed off for us to work.
2. All operatives will wear at all times necessary safety/protective clothing, eg overalls, safety hat, safety glasses/goggles, gloves, safety boots and ear defenders.
3. Ensure that electrical power supply is available and connect any required extension leads to the working area (we will use a generator as cables dangling along London road will be a hazard).
4. The jackhammer will be needed for probably a days work, we will hire it for two days just in case there is any unforeseen situations. We will use it to dig through the tarmac/concrete and get the lightweight manhole out.
5. We will then repair anything we may have damaged and get the new heavy duty manhole in, we will pug it into position leaving a small gap near the top of the cover.
6. Once the manhole is in place we will lay tarmac up to the manhole making the top of the cover level with the road.
7. We will then leave it to go off/hard and after that reopen the road for the general public to use again with a stronger manhole capable of taking the heavy weight.
Control Measures
Personal protective equipment to be used: Goggles, face mask, steel toe cap boots, overalls and hi-viz jackets during digging out the road and basic PPE for all tasks, especially hi-viz jacket as you need to be clearly visible to passing traffic.
Environmental.
Waste to be dumped in the back of a truck and taken for disposal (included in quote)
Health and Safety & Associated Risks
Specific Hazards - Flying debris, Noise, Vibration
Hazardous Operations - Risk Assessments provided
COSHH - Lime and asphalt
LIME:
Emergency Overview: Lime - Spar is an odorless white or grayish-white material that ranges from pebble to
a granular powder. Contact can cause irritation to eyes, skin, respiratory system, and
gastrointestinal tract. Lime - Spar reacts vigorously with water, releasing heat which may
ignite combustible materials in specific instances.
Potential Health Effects
Eyes: Contact can cause severe irritation or burning of eyes, including permanent damage.
Skin: Contact can cause severe irritation or burning of skin, especially in the presence of moisture.
Ingestion: This product can cause severe irritation or burning of gastrointestinal tract if swallowed.
Inhalation: This product can cause severe irritation of the respiratory system. Long-term exposure may
cause permanent damage. Lime - Spar is not listed by MSHA, OSHA, or IARC as a
carcinogen. However, this product may contain trace amounts of crystalline silica in the form
of quartz or crystobalite, which has been classified by IARC as a Group I carcinogen to
humans when inhaled. Inhalation of silica can also cause a chronic lung disorder, silicosis.
Medical
Conditions Aggravated
by Exposure: Contact may aggravate disorders of the eyes, skin, gastrointestinal tract, and respiratory
system.
Potential
Environmental Effects: This material is alkaline and if released into water or moist soil will cause an increase in pH.
Eyes: Immediately flush eyes with generous amounts of water or eye wash solution if water is
unavailable. Pull back eyelid while flushing to ensure that all lime dust has been washed
out. Seek medical attention promptly if the initial flushing of the eyes does not remove the
irritant. Do not rub eyes.
Skin: Brush off or remove as much dry lime as possible. Wash exposed area with large amounts
of water. If burned seriously or if irritation persists, seek medical attention promptly.
Inhalation: Move victim to fresh air. Seek medical attention. If breathing has stopped, give artificial
respiration.
Ingestion: Do not induce vomiting. Seek medical attention immediately.
TARMAC:
Emergency Overview
Regulatory status : This material is considered hazardous by the Occupational Safety and Health
Administration (OSHA) Hazard Communication Standard (29 CFR 1910.1200).
Signal Word : WARNING
Hazard Summary :
Hot material can cause severe eye and skin burns on contact. Hydrogen sulfide
from heated material can accumulate in vapor space of tanks and containers.
Contact between heated material and water can cause a violent eruption. Fumes
from heated material can cause irritation to the eyes, skin, and respiratory system,
and can increase susceptibility to sunburn.
Potential Health Effects
Eyes : Hot material can cause burns to the eyes. Mists, vapors or fumes from this
material can cause eye irritation with tearing, redness, or a stinging or burning
feeling.
Skin : Hot material can cause burns to the skin. May cause skin irritation with redness,
an itching or burning feeling, and swelling of the skin. Exposure to sunlight and
to asphalt vapors may amplify tendency for sunburns. Skin contact may cause
harmful effects in other parts of the body.
Ingestion : Contact with hot material may cause burns. If swallowed at ambient
temperatures, no significant adverse health effects are anticipated. If swallowed
in large quantities, this material can obstruct the intestine.
Inhalation : No significant adverse health effects are expected to occur upon short-term exposure to this product at ambient temperatures. Asphalt fumes have been
associated with irritation of eyes nose and throat. Also, lower respiratory effects
have been reported. Hydrogen sulfide (H2S) can evolve when this product is
stored or handled at elevated temperatures. H2S can cause respiratory irritation
and hypoxia. At low concentrations, H2S has an odor of rotten eggs. At higher
concentrations, H2S odor is not apparent. DO NOT use odor as an indicator of
exposure to H2S.
Target Organs : Eyes, Skin, Respiratory system, Kidney, Liver
57 Dale Drive, Patcham, Brighton BN1 8MY
TEL: 01273 506843 Mob: 07654323765 Fax: 0161 728 3172
RISK ANALYSIS SHEET
Activity / Operation ~ Replacing lightweight manhole with a heavy duty manhole
Identifying Hazard ~ Flying Debris / Noise / Vibration / Lime / Asphalt
**************************************************
RISK ASSESSMENT
SEVERITY LIKELIHOOD
High € Fatality, Major Injury or High € Certain or Near Illness Causing Long Term Certain to Occur.
Disability
Short Term Disability. To Occur
Low € Other Injury or Illness Low € Very Seldom or Never occurs
**************************************************
S/L RATIO
Plot assessment of SEVERITY
L/M M/M H/M
H/H: Avoid wherever possible.
L/L M/L H/L L/L: minimal risk.
******************************************************
SPECIFIC MEASURES REQUIRED TO MINIMISE THIS RISK
Protective equipment - Gloves / Goggles or safety glasses / Dust Mask / Safety Shoes / Ear defenders.
A qualified electrician must make all electrical connections. All test PAT Test certification is in place.
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crookes crooked construction & co.
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