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This report has been commissioned for the client to give an in depth analysis method statement for the works carried out to the cotton mill, which will involve demolition, site clearance and construction for the new DIY store intended to be constructed. The report will cover the complete project duration form day one on site to the final hand over of the building.
The report will focus on the site arrangement and layout for the new DIY store in its three main stages of construction which is:
Site Preparation and Demolition
The way the site has been arranged in regards to the site layout and how the different resources required by the labourers has been laid out, will be analysed throughout the report in each of its stages.
The purpose of this is to justify the decision made for the site layout is of best interest for the construction of the DIY store in regards to efficiency, the health and safety of the staff in accordance to legislation and the general wellbeing of the neighbouring community. Special attention will be given to:
The users of the Sainsbury's store located directly behind the cotton mill.
The day nursery opposite the cotton mill.
The High school which is beside the day nursery.
The residents living near the building.
Commuters traveling along Apple Street and Charlton Bridge.
The weir which is directly opposite the ancillary building.
Scope of Works
The works involved on the site involve:
The clearance of the existing cotton mill and ancillary building
To adjust the site layout for the construction of the DIY store
The construction of the DIY store
Landscaping of the site
The contract period for this projected is expected to be 85 weeks and the contract sum is approximately £7.4 million with liquidated damage set as £7,500 per week. The date of possession of the site is anticipated to be 10th January 2011
Site Arrangement and Logistics
The management of the site is important to make sure that all proposed work can be completed for its proposed date in a safe and efficient manner. All site arrangements are planned and managed in advanced for each stage, all arrangements are unique to its stage to ensure optimal performance throughout the project. Detailed planning has gone into site arrangement in each stage to fully understand the scope of the project and how arranging plants, office accommodation and welfares is used to the contractors advantage to guarantee maximum health and safety and efficiency.
The next section will explain the site layout in accordance to each stage, all site layout plans can be found in Part A.
Site Perpetration and Demolition: Plan no 1
At the entrance of the site they will be a heavy duty sliding aluminium fencing painted in anti-climb paint. Anti-climb paint is an extra precaution taken out for the sites security as a school is located nearby it can help prevent break in from student. The front gate will allow vehicle and pedestrian access.
The gate will be controlled by a gate keeper who will be there to let vehicles and pedestrians in to the site, the keeper will help direct delivery trucks into the right location around the site with the awareness of other staff around the site in addition a banksman will be hired to do signalling. Special training will go into the gate keepers roll as their duties and responsibilities will be unique compared to other staff. To help aid vehicles to deliver material and also make drivers aware of any labourers around there drop off points, signage will be placed around appropriately.
All vehicles leaving the site will be checked for cleanliness by the gate keeper, if there was dirt the gate keeper will jet wash the dirt away.
The entrance gate is the main access point on to the site therefore it has been placed at the front where the gate can be visible from all the far corners of the site. This is so that employees will be able to see any trucks or plants leaving or entering the site, as well as the public- they will be able to see vehicles turning into or leaving out of the site. This will give staff and pedestrians greater awareness of their surroundings which could possibly diminish potential accidents.
Hazard Risk Board/Think Safe board:
On entrance to the site all operatives and drivers will be presented by a hazard board which will inform them off all the activities which will be taking place on the day as well as any potential hazards which have happened. The board will be constantly updated, this is extremely important as it will remind workers of any hazards which will be taking place on the day for example demolition of the building. The hazard risk board is at the front as it is there to remind the operatives off activities taking place as soon as they enter the site to protect them from any potential accidents.
Also at the site entrance will be a large think safe board reminding operatives and the community off all potential hazards on site, the think safe board will be specially adapted to cater to the visually impaired by having information up in braille and catered for the hearing-impaired by installing a loop system next to the board.
There will be 5 parking bays allocated on site which will be used by the Foreman, Contract manger and project manager the other two bays will be for guest visiting the site. Out of the two guest bays one will be a disabled bay parking. The parking space will be near the site entrance towards the reception, this is so that workers can quickly park and be able to quickly get into their work. Another reason is for access for the disabled will be less strenuous as the reception will be directly near the parking.
All staff must go through the reception to gain access to the site; this is where staff will be able to sign in using a clock in style system. This is implemented so that the project manager will know who is on site and to make sure staff has arrived on time. By going through the main reception will disable any unauthorised personnel from entering the site. An added security feature will also be implemented where all staff must present there CSC cards to the receptionist to prove there occupational competence, without this they will not be granted access to site. On entering the reception staff must also have on display a badge which shows that they have been for induction, if not the receptionist will admit them into the introduction room where they can be briefed and given a badge to show that they have completed induction. Each staff will be briefed again at different stages of construction and be assigned a new colour badge at each stage to prove that they have gone through induction.
The main office is a 25m² port cabin located on top of the reception cabin; this is for the professional qualified personnel's to complete their work. The main office will have its own toilet and washing facility's which will be used by the staff working in the office and the receptionist. The office will be equipped with computers and telephone points which will be used for business and safety features. Visitors can also go upstairs to the mobile office as space will be allocated for short meetings.
The main office will be placed on top of the reception as this will free up space for other rooms around the site, also by having the office high up staff can have a better view of the construction site and to look over operatives.
The induction room is the first room next to the reception; all staff will have to report to this room on their first time on site, and also once at each stage of construction. Here staff will be educated on health and safety, site rules and regulation and potential hazards on site and familiarize themselves with signage meanings. Staff will also be briefed on where fire exits/emergency exits are located around the site and where the fire assembly points are. A mini map of the site layout will be given to locate where the welfares and amenities are located. After briefing staff will have to complete a multiple choice test to ensure that staff has been educated adequately. If passed staff will be given a badge to show that they have completed their induction and will be given there protective clothing and equipment and a locker key if applicable. If failed then an in-depth one to one session will be given as it is the employees' duty to make sure that staff is protected around the sight.
The induction room is located right next door to the induction room as this is the first place all staff and visitors have to go to be briefed to make sure they can precede around the site.
The café/resting area will be located next door to the induction room here employees will be able to have their lunch and also take their breaks. The canteen/resting area will protect staff from the weather and will have provisions for heating staff on cold days. The canteen will have windows to keep the room cool on hot day and also can be opened to remove any discomforting smells. The canteen/resting area will be equipped with table and chairs so staff can sit down and eat comfortably. Provision for preparing food will be incorporated into the canteen by having a microwave oven as well as a kettle to boil water. Adequate provisions will be carried out to make sure that clean water will always be readily available to all staff by having two water tanks in the canteen/resting area, this will be regularly monitored to make sure cups and water are always available. Signage will be put around the cabin to reinforce the no smoking rule around the site.
The canteen and resting area is on site as this will allow workers to take there breaks within the site perimeters which will give staff more time on their break which will give them a chance to re energise. Also it will ensure staff can start work immediately after their break as they are already on site. The cabin is situated at the furthest point away from any works, this is to ensure that no dust or debris can come near the resting area; this is for the staff safety and welfare. By having the canteen close to the entrance staff again can come to work early and have their breakfast before they start work which will save them time and help prepare them for the day.
First Aid room:
Next door to the canteen will be the first aid room which will be a full time occupational service ran by a medial practitioner. The room will comply with the health and safety (first aid) regulation 1981, sub section first aid room. A few examples of what the first aid room will entail are as follows:
Sink with hot and cold running water.
Smooth topped work surface.
Clean protective garments for first aiders.
The room will be cleaned on a regular basis and will always be ready for immediate use in case of an unfortunate case of an accident to occur. The room will only be used as a first aid room and will be clearly signposted in its universal green and white symbol.
The room is sited at the front of the building as it has easy access to transport and to other surrounding welfare facilities.
Scattered around the building will be first aid box's which will comply with the recommendation found in the HSE leaflet IND(G)215L first aid at work, a few example of what the kit will involve are as follows:
20 individually wrapped sterile adhesive dressings.
2 sterile eye pads with attachments.
1 pair of disposable gloves.
Regulation 3 categories 2 of the health and safety at work act state that suitable staff should be able to perform first aid to injured staff. During the projects competent personnel's will be sent for training to learn first aid so that during construction the staff will have a first aider close by however in the meantime the first aiders will be the project manager, receptionist and gate keeper.
Bathroom/toilet and changing rooms:
Located near where works commence are two toilets and changing room one for boys and one for girls. Both toilet and changing rooms are identical in lay out. The bathroom/toilets and changing room has been broken down into two rooms, the room to the left is the shower room and toilets. This room on entrance has 3 showers for staff to wash themselves and 3 toilets to the north side of the room and 1 disabled access toilet. All the toilets and showers will work with a drainage system, where the water can be recycled to control dust on site. The bathroom/toilet will be adequately ventilated and sink basins will be large enough for staff to wash their face, hands and forearms. The room will have hand dryers instead of paper towel to help lower emissions, the bathroom will be equipped with soap and toilet paper Hourly checks will be carried out to ensure the cleanliness and facilities of the room are always up to standard.
The second room on the right can be accessed from either the front of the building or through the door between the toilet and changing room. The changing room will allow staff to get change from there uniform to their normal clothes or vice versa, lockers will be provided to staff to store their clothing and their belongings, as well as their work uniform which will have space for their boots, helmet and so on. A wall mounted electric spin dryer will also be installed in the changing room for staff to dry wet clothing.
Bathroom/toilets and changing room are located close to the site works as staff can get changed and get straight on to site, this is convenient especially once they have finished work as they can get rid of all the much and grime from their boots at the boot cleaning zone which is near the bathroom and proceed straight into the showers. This is beneficial as they will not make the rest of the site dirty. Another reason why this is a convenient location is because the closeness of the toilets to where the site works are commencing this will save time and allow for work to run more efficient as staff can quickly go to and from the toilets to the site at ease.
The ancillary building is located at the North West side of the site perimeter it currently contains offices, general offices telephone room and lavatories. All of these features have already been accommodated for on-site therefore this building will be demolished in this stage. Before any demolition will take place all electrical, gas and water supply will be cut off. Whilst demolition takes place of the ancillary building all works will be planned and all necessary requirements will be taken to prevent or reduce danger. Also all demolition works will be recorded prior to the demolition during the demolition and on completion. This is a requirement for CDM regulation part 4 section 29.
The mobile plant will be located beside the North West side of the site perimeter next to the ancillary building. According to Construction health and safety standard - No. 26 it is requirement for a site which will involve vehicles on site must make provision for mobile plant storage. The mobile plant will be fitted with a flashing amber beacon and will be controlled by a competent Banksmen. The banksmen role is to ensure that the reversing area of the mobile plant zone is free of pedestrians, vehicles manoeuvres are executed safely and to constantly watch vehicle operatives.
Type of mobiles which will be stored will include crawler cranes, dumper trucks and fork lifts and so on. The mobile plant will be next to the plant store and will all be gated off for security, safety and insurance purposes.
The reason why the mobile plant is located here is because it is very close to the site works which is convenient as workers can quickly access vehicles to get work completed and store vehicles quickly. The mobile plant is away from the welfare section and is in a secluded area of the site this is for the general safety for the operatives on site.
The plant store will be located next door to the mobile plant store, all materials and operatives tools like hammers, spades and scaffolding posts will be store in this container. Similar to the mobile plant store this storage will also be gated off and locked. A stock check will take place at the end of each day to make sure no tools will go missing. By keeping the tools in a plant store will protect them from being damaged whilst not in use and not to be affected by weather conditions.
The reason why the plant store is placed here as it is again very close to site next to the mobile plant store which will enable staff quick access to the tools required to complete their daily tasks.
Re fuel Store
The petrol store is located on the north east side of the site perimeter and is adjacent to the mobile plant store. The petrol store will be used by the vehicle on site to fill up petrol. As staff will be dealing with hazardous substances extra care will go into the setup of the petrol store and be created into a bunded area. Also extra training will be given to staff on techniques to clean oil spillages in a safe manner. Around the re fuel store will signage will show no smoking and no naked lights or other source of ignition should be used whilst re fuelling.
The petrol store location is ideal as it close to the mobile store, once works is done at the end of the day staff can refuel their vehicles and go directly to the mobile plant store so that vehicles are ready for work on the next day.
BS 7671:2008 specifically legislates for the supply of electricity on construction and demolition sites. This will be achieved by having a power plant is located at the edge of the north east perimeter of the site. here will be installed a generator will provide 400volts of electricity which will power fixed plants on site transformers will be installed to power outlets to step down the voltage to 110v to power general plants around the site this source will also power the lights and heaters in the oasis . In damp and confined situation and areas which will have high risk power outlets will be stepped down to 55v. The power plant will be caged up to avoid any damage to it.
The power plant is placed here as it is close to the construction site.
Site Waste Management
Site waste management skips can be located at the southeast perimeter of the site layout away from the welfare facilities. It is crucial to keep the site clean and to remove demolition and waste material from the site in an efficient manner, this is why a waste management controller will be appointed to transport all waste to the waste management zone. The waste management zone will have different type of skips for different types of material and waste, also for materials which will be recyclable. This will be identified by users with adequate signage placed on and around the skips. Waste will be transported from the site to the waste zone via dumper trucks which will be loaded with rubble from the demolition via diggers.
The site waste management zone has been placed here as it will provide good distance from where construction takes place to keep the construction zone clean and less hazardous, another factor is as the waste material will be heavy and access to the site can be restricting it will be easier for waste personals to simply pick up the waste from near the entrance using the secondary entrance specially used for waste collection.
Before any works takes place the upmost attention will be paid to secure site as well as the community. This will be achieved by erecting hoarding around the site perimeter, which will be of 2.5m of height made from plywood fitted with debris nets, this height is important as we will be demolition the cotton mill building and ancillary building the higher the hoarding the less likely for debris to fall over to public roads and in to the weir. On top of all the hoarding will have mesh to prevent unwanted personnel's to climb over. Hoarding will be secured into the ground by having post cemented into concrete blocks, this will give the hoarding stability to wind and ensure that hoarding will not fall over. All openings will be locked when staff are off site and the main gate will monitored by gate keeper, additional CCTV will be placed will be placed around the site and will be monitored by the gate keeper. The hoarding will have all relevant information for passer byers to contact an authorities figure on site also a brief outline of the scope of works and what potential hazards they need to be aware of. In order to keep the contractors image high regular maintenance will be taken place to hoarding to ensure there is no graffiti or damages done to the hoarding. Pleasant pictures will be painted on the hoarding so that community will not see an eye sore.
Construction Phase: Plan no 2
Everything from the site preparation and demolition phase will be kept in the construction stage with addition to new plants which will make the construction phase run more smoothly. Note however a few minor adjustments will take place with existing plants which will be explained in this section.
Access roads and pedestrian routes around the site:
All access roads and foot paths will have hard surfaces and have the universal Highway Code markings. The access road will run from the main entrance and will lead to the centre of the construction works, from this point there will be a mini roundabout for vehicles to turn. If turn left it will lead access to the mobile and plant zone, if turns right it will take you towards the material offload zone, from here you are given road access to the material storage and plant fabrication zone. Alongside the road which gives access to the material storage and plant fabrication and mobile and plant store will be pavements for operative to walk around the perimeter of construction works safely. All paving's will have a little fence beside it to segregate the road access from the pedestrian access to reduce any hazards.
This layout for road access has been thought for in favour of deliveries on site, the aim was to have trucks with material come in to site go around the roundabout towards the exit and unload material into the loading zone. Like these trucks will not have to reverse out of the site on to a busy roundabout the driver will be given help and direction by the gate keeper who has been trained uniquely for this position.
The two roads placed on opposite sides of the site (left- mobile and plant storage, right- material storage and pre fabrication zone) have also been given road access as all vehicles on site needs to be parked in to the mobile plant zone. It was crucial to have road access to the material storage as it will have to be a quick process to move materials from the loading zone into storage, this can be successfully achieved in a most efficient way by using vehicles to drive to and from the loading zones. All deliveries will be made big as this will minimise the amount of times trucks will have to come and visit the site.
Deliveries will only be delivered between 9am till 3 pm this has been agreed with the local schools to ensure maximum safety for the minors. All delivery drivers will call the banker to keep them updated on their location so the banker can prepare the site and staff for the delivery.
All footpaths and road paths will be monitored and when not in use be cleaned with power floor washes to keep the appearance of the site at a high standard and minimise dust. All vehicles leaving the site will have their tyres washed so that no muck will come out of the site.
The site will have multiple access point placed around for safety exits and fire exits the perimeter, access point 2 will be located at Charlton Bridge. This will be used a fire exit during the works of the construction project starting from demolition ,once works are completed, at the landscaping stage it will be converted to a service area for vehicle access. All exits will be clearly signed as well as being regularly checked to make sure access points have no obstructions.
The unloading zone is located at the south east corner of the sites perimeter. This is where trucks will pull over to unload material onto site; adequate signage will be placed around this zone to minimalize any potential accidents. Once materials have been unloaded operatives will come with fork lifts to take the material and store the material in a safe bunker which is adjacent to the unload zone. The material will then be locked away and be used when needed on site. The reason why the unloading zone has been placed in this location is because it allows easy access for delivery trucks to come on to site, drop off the material and leave in a safe manner. Another reason is because of the closeness of the storage bunkers; staff can simply take the material and store it safely as soon as delivery arrives. This will result in no material left lying around and save staff from any potential hazards.
All material used during the construction will be stored in storage bunkers, these bunkers have been scattered across the perimeter of the site directly opposite where construction works are taken place. Storage is important as it secures the material which will be used to complete the construction, prevents material from being damaged by weathering as well as keeping the site tidy. Material will be stored in a manner that it will be easy to put in and take out material without struggling.
Material store have been cleverly allocated around the site to keep workers motivated and always engaged in work, this is because when staff run out of material there are in close proximity to get more. By having material stores close to operatives it will save them time and effort when renewing their materials as they do not have to travel far.
Pre Fabrication Store
When material come on to site they will need to be fixed and fitted this can be done in the pre fabrication room, this room will be dedicated to personnel's to assemble material so that it can be fitted or used on the construction site. They will be two pre fab stores located at the east boundary of the site perimeter.
Now that the ancillary building has been demolished the mobile plant has been extended to fill up the space, the reason for this is more vehicles will be on access for the construction of the DIY store therefore more space will be required to park the vehicles.
The waste management skips will be in its same spot playing its same role and duty but now the skips will be smaller as all the demolition have taken place and all the main waste has gone.
External Finishes and Landscaping: Plan no 3
From this point onwards all construction will be completed and all services will be activated and will be running in the newly built DIY store. This will make logical sense to remove everything from the demolition stage which is:
First aid room
Crane and diggers
Temporary Power supplies
At the landscaping stage the access roads will be smoothed over and will be ready for applying signage's on the floor (parking bays, entrance sign, zebra crossings etc.) also any last minute touch up jobs or repairs can be completed at this stage. Due to the nature of such a project last minute repairs will bound to occur this is why we there will still be the following on site(note as works are complete they will be one of each but small, as works are completed big tools are no longer required):
Small waste separation
Even though minor works will still carry on it is still essential to uphold site security and the safety of all personnel on site. To help achieve this, the following will still be intact to the site until the DIY store is competed, and ready to hand over to the client:
Health and safety signage's
Site hoarding/ CCTV
First aid points
Construction health and safety section 10 - electricity
BS 7671:2008, Section 704 specifies requirements for the supply of
electricity on construction and demolition sites. Electrical installations of
offices, cloakrooms, meeting rooms, canteens, restaurants, dormitories,
toilets etc. on construction and demolition sites are covered by the
general requirements of BS 7671:2008, Parts 1 to 6.
BS 7375:2010 Distribution of electricity on
construction and demolition
sites - Code of practice
Prior to any construction work starting on site, electrical, gas and water supply will be cut off from the perimeter of the site. This means the use of generators will be needed for lighting purposes on site, in the temporary surgery and electricity for the use of mechanical tools. Gas cylinders will be used to heat up the oasis cabin units. Storage tankers will be used to store fresh water for cleaning and drinking purposes. The will be enough electricity provided by the 110 Volts DC generator for the labourers on site to work on as well as powering the cabins and the temporary surgery. Along with the generator, emergency lighting will also be installed in the case of a power shortage hence blackouts.
There will be another access point situated on Floyd Road at the other end of the site. This will come in use for deliveries and disposal of stockpile material which is talked about later in Section 4.15. For health and safety reasons, two access points will be needed in the case of a fire i.e. a fire escape route. Suitable signage will be posted around the site showing the fire escape route.
The Construction (Design and Management) Regulations 2007
Demolition or dismantling
29.-(1) The demolition or dismantling of a structure, or part of a structure, shall be planned and carried out in such a manner as to prevent danger or, where it is not practicable to prevent it, to reduce danger to as low a level as is reasonably practicable.
(2) The arrangements for carrying out such demolition or dismantling shall be recorded in writing before the demolition or dismantling work begins.