All preparations, including the reinforced steel, have been completed in the garage section of the building to prepare for pouring the concrete slab for the garage.
The special inspections engineer reviews the placement and securement of the reinforced steel for the garage slab.
Both the structural engineer and the site superintendent review all of the preparations to ensure the area is ready to pour the slab. This area of the building will have to be strong enough to support regular bus traffic in the maintenance bay.
The concrete contractor has poured the slab and is finishing the surface while it is still wet to give the finished slab a nice smooth surface for the garage area.
After 24 hours the concrete will be hard enough to walk on but it will need an additional week of curing time before any more construction can occur on top of the slab area.
Pouring a concrete slab requires a lot of special equipment and skilled labor to complete the process correctly.
In addition to inspecting the garage area, the architect, the structural engineer, and the special inspections team perform further testing and inspections on the first floor section of elevator shaft. These inspections and tests are to verify that everything has been completed according to the design specifications. They will also ensure that everything meets the International Building Code (IBC) requirements.
Now that the first floor slab has been completed in the office area and the garage section, the steel workers begin to lay the 2nd floor decking in preparation for the 2nd floor slab to be poured. Here a steel worker takes a break from welding the decking to the steel beams that will support the 2nd floor slab.
In addition to the metal decking, the 2nd floor must also have reinforced steel placed within the concrete slab to give it the proper strength it will need to support the floor and meet all of the design requirements.
With the metal decking installed the engineering team inspects the 2nd floor area of the elevator shaft to ensure it meets all the design requirements before the 2nd floor slab is poured.
With all of the preparations completed, the concrete pump truck is on site well before sunrise pumping concrete up to the 2nd floor to form the fininshed slab.
With all of the concrete in place the contractors work to smooth the surface to a nice even finish to complete the 2nd floor.
Once the garage slab has had enough time to fully cure and harden, construction of the pre-engineered metal building (PEMB) for the garage section begins with placement of the exterior wall columns around the perimeter of the slab.
Like the office section, the steel workers must once again perform a delicate balancing act to install the columns and beams in place for the PEMB. The site superintendent, Bernie Campbell of McKenzie Construction, and our construction manager, Jerry Walker look on as the first set of columns are joined together by support beams.
The garage begins to take shape as its skeleton is assembled together with each support beam in place.
With the roof supports in place the PEMB for the garage section continues to progress forward.
In addition to constructing the garage, the roof trusses for the office section are being set into place as the primary roof support system for the office area.
Again, like most steel work, the trusses require a high degree of skill and balance to get each truss secured into its proper place. This requires close communication between the roof team and the crane operator to ensure everything is done safely.
Once all of the trusses are installed the next step will be to install the roof decking which will support the insulation and the exterior panels that will make up the finished roof system.
Progress continues on the garage while the trusses are being installed on the office section. Looking through the frame work that will support the overhead bay doors, we can see the crane installing the hoist beam that will be used for lifting heavy mechanical parts or moving supplies into the storage area of the second floor.
With the PEMB (pre-engineered metal building) complete, the contractors will begin to install the exterior panels and roof system to enclose the garage area and make it weather tight.
Here we see the beginning of the exterior wall boards being installed. These boards are made of moisture/mold and weather resistant material known as Glass-Mat sheathing for exterior walls.
Here the West wall of the garage section has been completed. Next it will be covered with a plastic wrap material, such as Tyvek, that will also act as an additional weather barrier. After the weather barrier wrap is completed, a fiber cement board siding will be installed that will become the finished exterior surface.