BUILDERS PLANT AND TEMPORARY

WORKS AND SERVICES

Lecture 2

One of the most important resources to be managed is

machineries and equipments.

The cost of using machineries / equipments may varies

from the range of 20% - 40% of total construction cost.

Some types of projects are labour intensive while

majority of infra-structure works are extensively using

machineries / equipments.

Introduction

Based on substantial cost involved, thus construction

machineries / equipments must be properly

managed.

Appropriate planning and acquiring of machineries

can help to reduce or avoid the problems face during

construction stage.

Introduction (contd)

Planning and scheduling of machineries / equipments

must be indicated on the work programme.

Requisition on acquiring must be made once the

decision has been made to use a particular

machinery.

Analysis of levelling on the usage of machineries /

equipments can guide the managers to make critical

decision.

Planning of Machineries and

Equipments

Undoubtedly, critical activities will be given the most priority.

If during a particular day, 2 or more activities require the use of same equipment, hence priority must be given to the critical activity.

Despite careful planning and acquisition, problems may still occur during construction stage.

Planning of Machineries and

Equipments

Several problems faced by the contractors during the constructions progress.

Among these problems are highlighted in Figure 1. However, the important things to do is to acquire the machineries / equipments needed.

Problems related to Machineries and

Equipments

Several Activities

SHORTAGESINEFFICIENT

BREAKDOWNUNAVAILABILITY

PROBLEM RELATED TO

MACHINERIES & EQUIPMENTS

STOLEN

No Security

No Maintenance

Over Usage

No Requisition

Uneconomic age

Unaware of Market

Availability

Unplanned

Under CapacityUnskilled

Operations

No Hoarding

Figure 1 : Problems Related to Machineries and Equipments

The decision to acquire construction machineries /

equipments has to be considered seriously cause the

capital required is very high. The cost of some

machineries can be in the range of several hundred

thousand to Million Ringgit.

If decided to purchase and own a particular machine,

one has to take into account services such as

maintenance, rental, cost account, etc.

Acquisition of Machineries and

Equipments

The decision to acquire construction machineries /

equipments has to be considered seriously cause the

capital required is very high. The cost of some

machineries can be in the range of several hundred

thousand to Million Ringgit.

If decided to purchase and own a particular machine,

one has to take into account services such as

maintenance, rental, cost account, etc.

Acquisition of Machineries and

Equipments

There are several factors to be considered if one decided to purchase and own a particular machine.

(i) Output Capacity beside capacity of the machine, availability of skill operator has to be taken into account.

(ii) Market Demand before purchasing it is good to consider market demand so that the purchasing is not only for a project but can also be rented out.

Acquisition of Machineries and

Equipments

DIGGER & BACKHOE multiple usage it finds its

application

Building highways, airports and roads.

Construction of dams, water and sewer systems.

Constructing commercial buildings, housing developments, hospitals, schools and office building.

Helps in mining and offshore drilling.

Excavating, digging, small demolitions, landscaping and preparation of construction sites.

BulldozerLike any bulldozer scrape dozer too has tractor, ripper and blade as the main part. It uses scraper for doing various functions which in turn is controlled by joy stick, monitor panels and pedals. The whole mechanism of the dozer depends on the principle of the hydraulic systems.

ApplicationsLand clearing and land leveling Preparing construction sites Helps in the construction of roads Construction and maintenance of canals and dams Removal of snows Other smaller and bigger civil engineering projects.

ScrapersScraper is an important mechanicalequipment that is used for excavating,digging and hauling of materials. Scraperis available in different sizes andconfiguration depending on the nature ofthe project. It is one of the most versatileequipment that performs differentfunctions single handedly.

ApplicationIt helps in preparing the ground for thenew loads of solid waste that constantlyarrive.

Helps in preparing work at landfills.

It digs, the site, loads, hauls and dumpsthe wastes materials and helps inpreparing the sites for construction.

It is also used in road construction etc.

CraneArmed with heavy carriagecapacities and powerful engines,the construction crane findstheir applicability in numerousprojects like.

ApplicationAt construction sites, cranes areused to lift steel, concrete andother materials.

i. Construction of bridges.ii.Construction of ports.iii.Lifting heavy industrialdevices.iv. Used in lifting of containerson sea ports etc.

Batching Plant

Equipment used at a concrete batching plants includes soils, weight hoppers conveyors, mixer engines, and auxiliary generators. The raw material like cement, sand and aggregate are batched and mixed into slightly moisture concrete. The required concrete is fed via conveyor belt into the block machine. Boom Scrapper is used for pulling the material towards the gates for batching of aggregates. Cement Hopper with Screw Conveyor, concrete mixer reversible drum, weight batcher with precision scales for aggregate and cement are some of the other equipments that are used in concrete batching plants.

TEMPORARY WORKS AND SERVICES