TYPE OF CONSTRUCTION: Plumbing & Mechanical – Commercial
SCOPE OF WORK:
Installation of Plumbing & Mechanical systems for a
new office building, including but not limited to;
• 27,400+ feet of plumbing piping
• 127,300+ pounds of metal ductwork
• (9) Air Handler Units
• (2) Boilers
• (2) Domestic Hot Water Heaters
• (170) VAVs
• (19) Exhaust Fans, Relief Fans, Supply Fans, &
Gravity Vents
• (2) Air Cooled Screw Chillers
• (1) VRF System
• A new BAS system
BUILDING FEATURES:
• (4) Levels of Office Space
• Full Service Commercial Kitchen
• Connector Wings to Two Existing Office Buildings
SIZE OF PROJECT:
• 143,050 sq/ft
CONTRACTED VALUE:
• Original Contract – $5,422,260
• Final Contract – $5,860,910
LENGTH OF CONSTRUCTION PROJECT:
• 12 Months
PERCENTAGE OF WORK SELF-PERFORMED:
• 79%
CONSTRUCTION COMMUNITY OPPORTUNITIES BASED ON MERIT:
• When bidding a project, our estimators will send out a request for proposal to our database of pre-qualified subcontractors/suppliers. When awarding the contract/purchase orders for this project, we considered the amount of the bid, as well as the experience of the subcontractor/supplier with the type of work associated with this project.
Mechanical Systems of Dayton Inc. entered into an agreement in June of 2019 with Gilbane Building Company for the Plumbing and HVAC Scope of Work for the construction of a new Speedway Campus Expansion Office Building located in Enon, Ohio for a total contract value of $5,860,910. The project consisted of a total of 143,050 S.F. with four floor levels and a mechanical roof penthouse and was asking for substantial completion by the end of June 2020. We had basically one year to fulfill the installation of the following;
HVAC
• Boilers
• Chillers
• Modular Air Handler Units
• Hydronic pumps
• Variable Air Volume Boxes
• Unit heaters & Fan Coils
• Exhaust fans & gravity vents
• Variable Refrigerant Flow Heat Pump System
• Commercial Kitchen Hoods
Plumbing
• (7) Restroom Groups and several individual Restrooms
• (7) Coffee Bars
• Domestic Water Booster Pump System
• Gas Fired Water Heaters
• Equipment Connections to Kitchen Equipment
• Kitchen Waster Interceptor System
• Backflow Preventers
• Natural Gas Piping System
Upon receiving a Letter of Intent, the structural steel was quickly being set in place and the concrete slab on the decking would soon follow. We knew going into this project that there would need to be an expedited coordination effort in order to begin our Scope of Work on schedule. MSD’s Virtual Design Construction team hit the ground running to begin locating the required floor and roof openings along by launching into a whole building coordination process with all mechanical, electrical, plumbing and fire protection trades that would need to produce the first working drawings within 90 days. Although that may sound like an adequate time-frame for the coordination effort, there was much coordination required for this project to begin and stay on schedule and to be considered an overall successful project. The coordination effort included;
• (7) mechanical rooms that housed (6) Modular AHU’s.
• (3) Modular AHU’s located on the roof.
• (170) Variable Air Volume boxes
• Roof Penthouse that consisted of (2) boilers, associated hydronic pumps, and
domestic hot water heaters.
• (2) Air Cooled Screw Chillers located in an exterior chiller yard along with
associated pumps.
• (2) Mechanical riser shafts from the lowest level through the roof.
• Full service commercial restaurant style kitchen.
And while it may seem that the coordination effort for this type of building is straightforward, there were many times that additional design issues would be discovered and would require further details from the design team. This had the potential for pushing back the completion schedule. As the coordination effort was completed floor by floor, our work was ready to begin. MSD is fortunate to have an in-house prefabrication
team and they reviewed the final coordination drawings to identify areas of opportunity for material fabrication which included the following;
• Hot water and chilled water loop piping system.
• Natural gas piping.
• Skid built water closet and urinal carriers for restroom groups which would allow for the Carrier group to be set in place as one unit followed by immediate tie-in of the domestic water and sanitary piping.
We were also able to utilize our pre-fabrication department to build housekeeping pad forms for the HVAC and Plumbing equipment with the required rebar welded in place which allowed for a quicker and more simple installation. The coordination and pre-fabrication not only resulted in labor cost savings, but was a contributing factor in realizing a successful completion of this very time-aggressive project thanks to Team MSD!
