* Because of major access restrictions it has been decided to erect all the steelworks first, thus cutting down on site congestion.
2. DISCUSS THE PROBLEMS ASSOCIATED WITH ACCESS TO & WORKING SPACE ON THE SITE.
ACCESS from road to site must be provided on a regular basis in all developments. Access maybe restricted to one point only by either local authority control or by the length of the front of the site. However possible the builder will use the intended permanent point of access at his entrance for construction traffic. If he decides to go with one entry point, the contractor is faced with the prospect of the trailers or lorries to drive onto the site and then after unloading reverse out into the street or when the lorries arrive to the site allow them to reverse in so as when their load has been delivered they can drive straight out or point 2 - provide a large turning area within the site to allow the trucks / trailers to drive straight into and out of the site, or point 3 once the truck or trailer arrives to the site keep it out on the road and either a fork lift or dumper truck to empty its contents or if a concrete pump truck its boom maybe extended. When planning these arrangements all parking and loading restrictions must be taken into account.
PLANNING is one of the most important elements to the construction industry, without planning of the site and its works a complete sham is inevitable. Each stage or process of a site must be planned day to day in advance. It is pointless in having a concrete delivery and the ground has not been excavated or steelwork not installed. These examples must be planned so as each activity is done in the correct sequence. Space is a key element to a good and safe working site, if this is not done in the correct sequence not only will your site be congested but you will have staff on site unable to carry out there duties because of site congestion.
Other important factors are the proposed layout of the building, roads and services; in addition there are a number of site issues which will influence the final decision. Regular consideration must be given to these items – location, means of access to and from site, materials to be used, size of site, and type of work to be done.
LOCATION obviously rural and city locations come with their own problems. Rural areas tend to be wide open spaces making storage and site accommodation easier. Public transport may not be readily available so site workers would have to devise some form of means of getting to and from site. City locations become very easily congested; it then becomes difficult to store components and materials, also very difficult for site accommodation for staff, but ample public transport.
SITE SIZE principle objective in construction planning is control, which is control of the works in progress, control of materials, and control of the working staff. On a small site, the control can be achieved by siting the foreman’s office near to the entrance, within convenient walking distance of the work and storing all materials in one storage area, under the supervision of one storekeeper. If the site is a large site this would not work. On very large sites several entrances maybe found, this also means all the entrances would have to be manned and gatekeepers appointed. This relieves the foreman of his job and his office can be sited in a position from which access to the entire site is more convenient. Putting all the material in one storage point may aid security but, on a big site this means traveling from various areas to collect material for the works. Placing several storage areas near to the worksite should remedy this.
SECURITY cuts down on materials being stolen, vandalism and public protection, this also includes control of site visitors, couriers and deliveries for whom a log will be made available to sign upon entry of site. The need for security may vary from site to site and the value of goods stored on site. Perimeter fencing, internal site protection and night security may all be necessary
DELIVERIES subject to traffic conditions in city areas, surrounding roads and to any imposed control on such things as parking and loading time restrictions, height and weight limits. In rural areas the distance to be covered by the delivery trailer are greatly extended and surrounding roads can be twisting and narrow, these factors both for city and rural areas will slow down the actual delivery and must be taken into account in both the planning stage and staff unproductivity.
3. CREATE A FLOW CHART & NETWORK DIAGRAM FOR THE FRAME CONSTRUCTION BASED ON REALISTIC ESTIMATES FOR THE DURATION OF THE ACTIVITIES.
NETWORK DIAGRAM AND CRITICAL PATH FOR THE CONSTRUCTION OF A
FOUR-STOREY STEEL FRAMED BUILDING.
TONY GIDEON CIVIL ENGINEERING CONSTRUCTION ASSIGNMENT DR RAHMAN Page of
