Wednesday, May 26, 2010

Week 2: Day 4


Tuesday May 25, 2010

Today both teams returned to the sites they visited on Wednesday May 19th. Group 1 visited the Kingdom of Sheba site and Group 2 visited the Conrad Hotel site.

Group 1: The Kingdom of Sheba

Tour to Kingdom of Sheba with Mr. Fergel, Mr. Patt Doyle and Mr. Tarek Matar

Tour on site:

Our tour began around the pool area where they use gunnite (a stiff material sprayed on steel and ideal for pools). The MEP coordination is very important on this particular area since all water systems are essential here. There is also a strong coordination between two sub-contractors carried out by the main contractor, DCC. For example, the kid’s pool wasn’t built because a nearby tower crane needs to be removed by a bigger one,which would need to be placed at the location of the pool.

We also elaborated on Post-Tension (PT) slabs: The steel cable path is marked with red on the slab for insurance. If any holes need to be drilled in the slab later, the markings ensure the tendons will not be hit. The main benefit of PT slabs is they allow long spans without beams. The procedure of casting PT slabs is: First we put upper and lower cage then we drive in the duct and bend it following the moment diagram. We pour concrete and do the tensioning over two phases, once at 25% of the concrete's compressive strength and again at 75%.

We also saw a transverse slab (solid slab) used for the mechanical floor, the mechanical floor requires a large amount of reinforcement to support the machinery needed. The work on the slab seen was delayed because of redesign.
Furthermore we discussed joints: expansion, movement and shrinkage joints are used for multi-purposes but all with the same goal: allow movement in buildings without creating extra stresses.

Lecture about Planning:

  1. Contract program: Original time schedule that the contractor and client originally agreed on.

  2. Update program: re-nominations and redesigns usually cause delays in the original schedule. In addition to that, the indecision of the client causes much delay this is why they go to acceleration programs.

  3. Acceleration program: A speed up process that all parties agree on in order to accelerate the project. Usually the cost increases (supervising cost mainly) and the client pay it. This process isn’t about increasing the amount of labor; it is mostly increasing the amount of tasks performed in a given area.

  4. Project organization chart : The top of the chart is the project manager who supervises the rest of the staff : IT technician, Secretary, document controller, managers, surveyors, night shifts, etc…





Group 2: The Conrad Hotel
Tour given by Mr. Omar Lababidi, Project Director

Tour on Site:

Team 2 visited Conrad Hotel’s construction site for the second time. We arrived in the morning to the site and we were welcomed by the project manager Mr. Omar Lababidi, who showed us a short movie about the car park system that will be used at the Conrad Hotel.

Mr. Omar then took us on a tour to see a sample of the standard rooms for the hotel, mock-up rooms had been assembled on the second floor. These mock-ups showed us the interior design of the hotel, we were able to see a suite and a typical room. The mock-up rooms are almost fully functioning. Clients are brought into the rooms to test them out to insure they are satisfactory. Mr. Omar showed us interior design samples that clients of other hotels from the same chain as the Conrad Hotel will chose between

We later went to check the work in the car park space where piling works were being done. Afterwards, we saw how the exterior is being fixed with marble and granite. There are 22,000 pieces of granite and marble that will be used for the façade.

After being outside on the site, we came back to the office and checked again the drawings and a brief movie on how the hotel is supposed to become. The entire team agrees that going to see the Conrad Hotel.was an amazing experience



In the afternoon, after our site visits, we had a lecture on Construction Management from Mr. Ian Harper DCC’s Contracts Director. The information from this lecture can be seen at the link below.


Week 2: Day 3


Monday May 24, 2010

In the morning, we had the second part of Mr. Naim Mohamed’s lecture on Cost Estimation and Pricing. The information from the lecture can be found at the link below.



Sunday, May 23, 2010

Week 2: Day 2

 Sunday May 23, 2010


Upon arrival to the office we were tested on the different subjects that we had learned throughout the first week. We then had lecture given by Mr. Naim Mohammad (Chief Estimator) that covered the first part of cost estimating and pricing. The description of the lecture can be seen at the link below.

Erga Progress Engineering Consultants

Lecture by Mr. Joseph Sawaya, Director

In the afternoon we visited Erga Progress Engineering Consultants, one of DCC’s preferred consulting firms due to the fact they are in good terms with each other. Mr. Joseph Sawaya, Director, lectured on the different projects that their firm has done. One particular project that he talked about was the Mina Al Fajer, a combination of villas, apartments, a marina and a 4 star hotel. One main challenge to this project was the unsteady soil that was located on site. A special technique (Tenser Retaining Wall) was used in order to stabilize the soil. Holes were also drilled so that rebar could hold the soil from collapsing, then grout was used to fill in the gaps in order to reinforce the stability of the rebar. He also talked briefly about the Ariyana Tower, 2Y Tower, Guardian Towers and finally the Sama Beirut located in Archrafieh, Lebanon.

Mina Al Fajer located on Fujeriah's Hajar Mountains

Week 2: Day 1



Monday May 22, 2010


For the first construction site visits, we split up into two groups and we went to two different sites. Group 1 went to The Kingdom of Sheba site and Group 2 went to The Conrad Hotel site.


Group 1: The Kingdom of Sheba


“The Kingdom of Sheba is a wonderful mix of two worlds”


Project scope:


  • Kingdom of Sheba is located on the Palm of Dubai, on the Crescent Road providing unrestricted views across the gulf.
  • The site area is about 700,000 ft2
  • Built area is about 1,847,000 ft2
  • Architectural style : Yemeni styled apartments and villas
  • Total of 300 keys: 28 town houses, 34 villas (4 or 5 bedroom) and 238 apartments.
  • Contractor: DCC
  • Consultant: Holford Associates


Tour on site:


First the team went through site induction by Mr. Arich who explained the importance of PPE on site in addition to traffic safety measures. Also we were shown the assembly points, the facilities (fresh water, restrooms, praying room…) and smoking sections.


After site induction we were guided by Mr. Patt Doyle and Mr. Fergel through the site in order to check the different construction phases and different sections of the site. A total of approximately 2200 people work on site (1200 of DCC , 500 of MEP and 500 of subcontractors)


First we inspected the curing of the concrete slabs: Mesh fabric is put on the slabs and constantly kept hydrated. The mesh absorbs water and keeps a wet medium for the concrete during the curing phase. We also learned that there is a constant coordination between MEP and structural in order to insure plumbing without having to drill through concrete.


Then we moved to check the waterproofing of the substructure. Since the Palm area is basically at sea level, waterproofing is essential. Constant dewatering is required while working on foundations or the substructure. This lowers the water table. In order to waterproof smooth finishing is required then the team uses Geotextile material to protect the waterproofing after backfilling. Also, DCC uses Micro-carbon Inhibitor for concrete to add a 30 life span to it against corrosion. When it comes to smaller structures bitumen liquid is used to coat kitchen, toilets, etc... and a 24-hour test in performed to check.


We also went to check the villa’s architectural features: mortar is used to make the impression of bricks; a Yemeni pergola is placed on the outer porch. GRC is used to create designs on balconies with the Yemeni texture. In order to hide cracks shadow lines are used on the corners. We also saw later on the steel mesh they use when there are two different materials, also in order to avoid cracks.



Group 2: The Conrad Hotel


“The Grandeur of the Conrad Hotel”


Project Scope:


  • Three basements, two podium levels, two mezzanines and 50 stories of business offices and deluxe hotel apartments.
  • There will be an automated car park with lifts and mechanisms that take cars to and from their racks in about 30 seconds, located behind the tower.
  • The car park and the tower are connected at Level 6 of the tower by a full length bridge that is covered by landscaping. Accessible from the tower, with a pool on the roof of the car park.
  • Total height of the building is 255 meters
  • Total built up area is 150,000 m2
  • The podium area is primarily supported by a s pace truss
  • Contractors: DCC and Arabtec (Joint Venture)

Tour:


After signing in at the entrance and going down into the cool basement for the meeting rooms, our group was given the general plans of the building and a safety overview for the site. The Conrad Hotel is a joint venture contract between two contraction companies, DCC and Arabtec, who previously worked together on the Fairmont Hotel in Dubai. This project is currently halfway done with the construction of the slabs and columns; the crucial piece between the two styles of the tower is currently getting ready to have the concrete poured into the pre-arranged reinforcement on site. We were also shown the piling and excavation that has been done for the technically advanced, automated car park.


The site was very hot, but when we went to the upper levels, there was a breeze, which broke our sweat, and we went through at least two or three bottles of water each! We were able to see the extremely large reinforcement that has been set into place for the transfer beam at the 24th floor, where the building changes shape and the columns no longer line up on top of each other. This beam needs 40 mm steal reinforcement and is extremely heavy because it is the foundation for the rest of the structure, the 25 floors that are still to be constructed.


We finished our first tour of the construction site with a ride back down the passenger hoist to another floor where we were able to see the hollow core slabs that are used on every floor except the floor holding the heavy mechanical equipment, floor 23. The hollow core is quite impressive, and it saves weight and cost for the entire building to have specially designed slabs in this way. Everything on site looks amazing, and we are excited to see it again in a couple days.


Week 1

Saturday May 15, 2010

Introductory information (AM)

Forming the team
The first day we went to the DCC head quarters, all of us received IDs, safety shoes, hard hats, hi-visibility vest, protective gloves and sunglasses which are the PPE (Personal Protective Equipment). We also received and measuring tape, a laptop and fully equipped desk. Afterwards, we formed 2 teams.


Sunday May 16, 2010



    Tour across Dubai + tour visit to Burj khalifa (PM)




    Monday May 17, 2010

    Presentation: LAB Architecture Studio (AM)
    Presentation by Donald Bates
    Mr. Donald Bates visited the DCC office and presented information about LAB Architecture Studio and their projects. Federation Square in Melbourne, Australia is shown below. The information presented can be viewed at the link below.




     Tuesday May 18, 2010

    Concrete batch plant visit (AM)
    Tour by Adel William, technical manager of RMB

    In the morning, we visited the Ready Mix Beton concrete batch plant. The lecture and tour information can be found in the link below.






      Wednesday May 19, 2010


      Site visit (PM)




      A- Code Building
      • Location: Barsha 3

      • Plot: 373-1323

      • Owner: Mr. Shirawi

      • Architect/Consultant: DXB Lab

      • 3B + G + 14 Office Building

      • Plot Size: 13030 ft2

      • Facade design inspired by computer coding


      B- 014 Tower
      • Location: Business Bay

      • Plot: B-014

      • Owner: DID (DCC sister company)

      • Consultant: ROR

      • 4B + G + 21 +2P Office & Retail Building

      • Plot Size: 3195m2, 34392ft2

      • Unique design, engineering, and construction methods create a globally distinguished structure.





      Additional lectures taught during the first week of the DSIP program including Safety, Reading and Understanding Construction Drawing, Introduction to Tendering Process and Construction Planning and Scheduling can be seen at this link: Week 1 Lectures.