Text of Resources in Construction / Materials. Materials for Construction No construction project can...
Resources in Construction / Materials
Materials for Construction No construction project can proceed
satisfactorily without materials. In smaller companies accounts may
be set up with some suppliers and foremen are given the
responsibility for ordering materials. With medium or large
companies the purchasing of materials is usually handled by head
office staff. However the site manager could be given this
responsibility on smaller contracts. Material management includes
Quality control and scheduling / testing Ordering Handling and
storage Waste control Security
Materials for Construction Quality control Prior to work
starting on site, the architect or engineer may require samples of
materials to be provided for their approval. These are called
sample panels. If samples are not used the contractor will still
use materials and components which match with the contract
documents. These documents include the bill of quantities, contract
drawing and specification. When materials are delivered to site
they need to be checked. Unsatisfactory materials should be
returned to the supplier.
Materials for Construction Ordering materials The procurement
of materials begins at the estimating / tender stage: Quantities
are taken from the bill of quantities or measured up on site.
Enquires are sent to suppliers and prices are obtained. The correct
quality and quantity of materials must be ordered. Deliveries
should be planned in advance so that no hold up occurs in the
production process, but not too far in advance that materials will
get damaged before they are used.
Materials for Construction Handling and storage of materials
Carelessness when unloading materials can cause waste. Having the
correct plant to handle materials is important. Bricks and blocks
are now usually delivered on pallets and they are lifted off using
telescopic handlers. This is quicker than lifting them off by hand.
It is better to lift off the material where it is going to be used
as this saves time. The storage of materials is as important as
their handling. There are problems if materials such as
plasterboard get damp. Incorrectly stacked materials causes
problems. Doors should be stored flat. Materials can be stolen if
not stored securely.
Materials for Construction Waste Control Approximately 35% to
45% of the cost of construction work is spent on materials. It is
therefore important that they are used efficiently. Two common
causes of waste include Excess materials being left unused Damaged
materials being unusable In order to prevent waste on site it is
important that there are supervisors on site, and site operatives
are trained in the correct way.
Materials for Construction Security Theft and vandalism cause
problems on many building sites. The losses incurred must be added
to the value of materials when allowing for waste. Small hand tools
and even large items of plant are also stolen and their loss causes
delays to production and an increase in insurance costs. It is
difficult to define a set of rules which would prevent theft and
vandalism on sites. They vary so much in size and location. Some
prevention measures are Checking deliveries Stop Site operatives
taking items Control of vandalism Vigilance against theft Crime
Materials for Construction Storage Correct storage for sheet
materials, plasterboard or doors. Stack on a continuous even
platform in a fairly dry environment. It is particularly important
that doors are stored in a temperature similar to that which they
will eventually be positioned.
Materials for Construction Storage Correct storage for facing
brick, paving brick and concrete blocks. Stack on a continuous even
platform normally a pallet. Stacks should be no more than 1.8
metres high. The pallets of brick should be stacked on a level area
which has been hard-cored. Facing brick are supplied from the
manufacturer wrapped in polythene to prevent them getting