amasaman group assignment edited by aheey
TRANSCRIPT
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1.0 INTRODUCTION
This report was compiled by the Amasaman group of the Construction Technology and
Management Level300 class of theKwame Nkrumah University of Science and Technology,
Institute of distance learning.
The group was tasked to visit a construction site and report on progress of work, ongoing
activities, future progress of work, construction site layout, hazards and adequacy of safety signs.
In view of that, we chosethe Achimota Retail Center, a shopping mall being developed along the
Achimota - Nsawam road by WBHO. The field work was done on 1st November 2014 at
12.00pm.
Company/Construction Site
Visited
WBHO - Achimota Retail Center
Company History WBHO Construction Pty is a South African Company with
over fourty years experience in the Mining, Earthworks,
Building and Civil work etc.,undertaking variousprojects in
South Africa, Zimbabwe, Congo DRC, Sierra Leone,
Mozambique and other African countries. It was incorporated
in Ghana about ten (10) years ago. They have undertaken
various projects including Ahafo and Akyem Gold projects,
with Newmont Ghana Gold as their client. They have also
worked with various mining companies such as Anglogold
Ashanti, Tarkwa and Obuasi mines, Obotan Gold project at
Asanko etc., among others. Their building works in Ghana
started with the West Hills Mall which is currently the
biggest Shopping Mallin West Africa.
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Projects Location Achimota (adjacent the Old Peace FM building and opposite
the St Johns Grammar SHS).
The construction site shares a boundary with the Electricity
Company of Ghana (ECGs building), Northwards. To the
South, with Best Point Savings and Loan, to the East, with
Pyto Riker (GIHOC) Pharmaceuticals and to the West, by the
Accra - Nsawam Highway.
ProjectsDescription Name of Project:Achimota Retail Centre
The 14000m
2
Achimota Retail Centreis being constructed by
the WBHO. The project is being developed by a private
investor, Delico Ghana Ltd.
The project is expected to house fifty (50) retail shops, banks,
fashion shops, restaurant/food courts, two basements and an
ample space for about 700 cars for parking.
The project commenced four (4) months ago and it is
expected to be completedin October 2015.
2.0 PROGRESS OF WORK
The project commenced four (4) months ago with site vegetation clearance and removal of
topsoil. It continued with detailed engineering earthworks, filling to make up levels in
foundationsand underneathfloor slabs.
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Concrete works have progressed quickly which have seen the basement for car park almost
completed. Roof trusses will be constructed on Retail Shops by next week.
The project is estimated to last for twelve (12) months.The progress summary document which
we saw, indicatedthat the project wasbehind schedule for seven (7) days.
Table 1.0 is a summary showing the progress of works for the month ending October.
Table 1.0Project start date 2ndJune 2014
Project completion date 8th
October 2015
Total days required 300 days
Construction elapse time 84 days
Construction remaining time 216 days
Actual construction remaining time 233 days
Variance in schedule/slip time -7 days
Percentage of completion 28%
3.0 ONGOING ACTIVITIES
As at the time our team visited the site, the workers were on pay-off, with only a few
employees doing power floating on site.
The following activities were ongoing during the time of our visit.
1. Concreting of column and column bases
1. Concrete in surface beds of car park and power floating of floor
2. Fixing rebars in beams
3. Plastering of wall around retail shopsarea
4. Fixing rebars in walls of sewage treatment tank.
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5. Placing of slab infills for coffer/waffle slab
6. Setting out and laying of sandcrete blocks.
7. Scaffolding. i.e. erecting and dismantling.
4.0 FUTURE PROGRESS OF WORK
1. Retail shop area to receive roof trusses
2. Plastering to be continued
3. Slab infills to be completed and concreted
4. First fixesof plumbing and electrical worksto start in some areas and to continue in other
areas.
5. Reinforcement in sewage treatment tank to be completed
6. Formwork to side of walls of sewage treatment tank to be completed
7. Concreting ofseptic tank walls to be completed
5.0 CONSTRUCTION SITE LAYOUTS
The construction site layout is very well arranged as shownin figure 1.0 below. There is space
for vehicular movementsto the various areas which is very important in setting up a construction
site. The site office is located near the entrance, south-easternside of the construction site. This
is to enable visitors, workers, site managers have a fair view ofwho is approaching or entering
into the construction site. Stores and workers change room is located near the entrance on the
south-western side of the construction site. Various laydowns for subcontractors,
refuse/scraps/offcut materials, eating and steel cutting and bending yard. There is a detailed
traffic layout around the office as shown in figure 2.0
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Figure 1.0 Construction site layout and traffic flow plan
Figure 2.0
FIGURE 1.0 SITE/ TRAFFIC FLOW CHAT
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FIGURE 2.0 SITE OFFICE LAYOUT.
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6.0 ENVIRONMENT,HEALTH AND SAFETY
WBHO is well known for its health and safety procedures and records,having chalked a lot of
success in this regard on various completed projects across the country. This project is no
exception. According to the Health and Safety Managers reports, total man hours for the project
as at now stands at 221,031 hours with a ZERO (0) Lost Time Injury(LTI).Now, only Six (6)
incidents were recorded which aremade of First Aid cases, near misses, theft and Equipment
(i.e. tyre) damage. The company has a well-established laydown safety cultures or safety
indicators and a few are stated below;
All workers on the construction site are inducted
All visitors coming into the construction site are inducted
All Operators are also inducted
Workers are advised to report incidents and not harbor them.
Workers using equipment and machinery are trained exclusively and are given
competence certificates
Work areas are visited frequently.
Job hazard analysis (JHA) is carried out before any work begins.
Pre-startinformation/Pre shift information is always carried out before work begins.
Tool box meetings are also carried outweekly.
Companys Safety Notice board with all policies displayed as well as Man-hours worked.
With the above safety indicators or cultures, we made a visit to site to have a fair view and
understanding of construction works and also identify possible hazards and adequacy of safety
signs on the construction site.
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Over and above, we believe that safety on the construction site is well managed and the hazards
found were of minimum risk except for the first floor area not barricaded and no toe board
placed on most scaffolds which might trigger a heights fall of persons, tools and equipment.
Tables 2.0 and 3.0 showpictures of hazards identified, stating its possible harm and possible
corrective measures.
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Table 2.0
Picture Hazard Identification and Possible correctivemeasure
Hazard - Protruding rebar uncapped
Possible Corrective Measure: Userebar cap and/orwrap a caution cape around the protruding rebar
Hazard - No caution tape put around excavationpit.
Possible harm/hazard - Minimum fall, a vehicle
could fall in pit if the driver is not familiar with
working area and possible leg breakages if
someone falls in.
Possible Corrective Measure: Barricade with
caution tape around excavated base pit.
Hazard - No caution tape put around excavationpit.
Minimum fall, a vehicle could fall in pit if the
driver is not familiar with working area andpossible legbreakagesif someone falls in.
Possible Corrective Measure: Barricade with
caution tape around circular excavated base pit
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Table 3.0
Picture Hazard Identification and Possible correctivemeasure
Hazard - No barricading on first floor
Possible harm/hazard - Fall of a person, tools,materials from height.
Possible Corrective Measure - Hard barricading orcaution tapesshould be used.
Access to the floor area can be restricted by using
a safety sign (AREA NOT SAFE) at the stair case.
HazardUnprotected or notoe board installed onscaffold
Possible harm/hazard- Fall of materials, tools and
equipmenton persons working below
Possible Corrective Measure - Use a 200mm highbarricade or 12.5mm plywood secured to the
scaffolds with a binding wire or rope.
Hazard - Not battering the sides of excavation ofdepth exceeding 2m
Possible harm/hazard - possible collapse of the
sides if the ground is unstable which could resultfrom exerted pressure from nearby foundations.
No quick escape for persons working in pit as
there are no side benches.
Possible Corrective Measure - width of excavation
could be widened, benched orbattered.
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Picture Sign Identification, adequacy and usage
Signs Identity-Vehicle speed limit
Position: Sign is placed just after the entrance intothe site.
Purpose: To inform drivers of light and heavy
vehicles and machinery of the maximum speedlimit on the site.
Signs IdentityScaffoldssafe tag
Position: Placed close to the access stairs toelevated scaffold platforms and other floor areas
Purpose: To inform possible users that scaffold or
elevated platform/working area is safe.
Signs Identity- PPE information board
Position: Placed at the entrance of the constructionsite and few locations within the construction site
Purpose: To inform workers, visitors etc.of the minimum safety requirements to access the
construction site
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Picture Sign Identification, adequacy and usage
Signs Identity-Electric Shock
Position: Sign is placed on various electricaloutlets (GPOs) situated at different locations inthe construction work area where electricity is
required for works.
Purpose: To inform workers of possible electric
shocks when accessing these power outlets.
Signs Identity- Assembling or Muster Point
Position: Placed close to the site office with
adequate open area.
Purpose: To inform all workers on the construction
site of the place of assembling in the case of an
emergency and possible evacuation.
Signs Identity- No Smoking
Position: Placed at the entrance of an enclosed areain which combustible materials, chemicals, oil etc.
fuel bundare kept.
Purpose: To inform workers, visitors etc. thatsmoking is not accepted in the area.
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Picture Sign Identification, adequacy and usage
Signs Identity- Fire Extinguisher
Position: Sign is placed at open and close areaswithin the construction site and wherebusyworksare going on.
Purpose: to extinguish fire in the cause of anoutbreak as a first option before the local fire
service is called upon.
Signs Identity- Emergency Exit
Position: Placed at indoor areasof the site officeson top of thedoors
Purpose: To inform occupants of the exit door in
the cause of an emergency or any fire outbreak.
Signs Identity- Wet Floor
Position: Placed mostly in office areas and otherareas of the constructionsitewhere water is found,
especially on concrete surfaces.
Purpose: To inform workers or occupants that
there could be a possible slip-and-fallif care is not
taken.