Vertical Construction and Renovation

Cerrudo Services’ experience in vertical construction and renovation includes multiple task orders for the US Coast Guard, US Army Corps of Engineers, Lawrence Livermore National Laboratory, Lawrence Berkeley National Laboratory and other Government entities.

US COAST GUARD TRAINING CENTER – BUILDING 134 MAINTENANCE AND REPAIR OF MEMBRANE ROOF AND HVAC EQUIPMENT

  • Client: US Coast Guard
  • Location: USCG Training Center, Petaluma, CA
  • Date: October and November 2021
  • Contract #: 70Z08821FPFP00200
  • Value: $505,064.00

Project Details

This membrane roof and HVAC replacement project required the removal and replacement of the existing roof membrane and replacement of two existing Bryant HVAC units over the bowling alley portion of the building.  Cerrudo installed approximately 8,900 SF of new ¼” roof cover board and white Dura-Last 60 mil PVC reinforced roofing membrane and base flashing (Areas 1 through 5).  New metal ‘L’ flashing was installed around the perimeter of Area 4 to prevent further deterioration of the existing roof deck.  Approximately 1,000 LF of new running seamless gutters and downspouts were provided.

The existing HVAC units above the bowling alley in Area 2 were replaced with new units containing R-22 refrigerant.  The existing unit’s refrigerant was properly recovered and all oils evacuated.  New shut off valves, flexible gas lines, and necessary fittings were installed.  Propane was supplied to the new units.  New electrical disconnect switches for the units were installed.

160 LF of new five-foot-high equipment screening was installed at the front side of the building.

US COAST GUARD – EMERGENCY RESPONSE CLEANUP ACTION AND POWER RESTORATION AT POINT BONITA LIGHTHOUSE

  • Client: US Coast Guard
  • Location: Point Bonita Lighthouse, Sausalito, CA
  • Date: October and November 2021
  • Contract #: 70Z08821FPQQ19200
  • Value: $207,515.00

Project Details

Point Bonita Lighthouse reopened to the public in July 2021.  Upon reopening, it was discovered that a transformer on one of the power poles supplying power to the lighthouse had failed and was leaking oil onto the ground.  PG&E commenced initial actions by severing power to the light.

Cerrudo Services provided all labor, materials and equipment to conduct emergency environmental testing and cleanup, replace the transformer and power pole, and restore power to the lighthouse.  Cerrudo tested the leaking transformer oil for PCB’s; none were detected.  The existing transformer was removed from the pole and the oil recovered in sealed vessels.  The pole was cut down in sections, then the base of the pole was jacked out of the ground, five feet deep.  The pole sections and transformer were removed from the site.

Cerrudo utilized a helicopter to transport the new pole and transformer to the site.  A detailed flight plan was submitted to and approved by the Coast Guard.  The new pole was set and the transformer attached to the pole.

Cerrudo retained an archaeologist to monitor all excavation work for any artifacts of interest.  None were found.

LAWRENCE BERKELEY NATIONAL LABORATORY, BUILDING 50B PENTHOUSE ROOF REPLACEMENT

  • Client: Lawrence Berkeley National Laboratory
  • Location: Lawrence Berkeley National Laboratory
  • Date: 2021
  • Contract #: 7581712
  • Value: $363,693.62

Project Details

Cerrudo Services provided the design and construction of the roof replacement and roof ladder installation at Building 50B Penthouse Roof.  The roof consists of an upper section (1,168 SF) and two flanking lower sections (each 710 SF).  The design included a new PVC membrane roof system with roof ladder and permanent fall protection system.  The roof structure was evaluated to ensure the ability to support the new roof system and new fall protection anchorage.

The new roof system included two fully-adhered layers of 1.5” ISO board insulation over a vapor barrier, and one layer of ¼” DensDeck prime cover board.  A fully-adhered PVC single-ply membrane was installed over the cover board.  PVC single-ply base flashing was fully adhered and a clad metal gravel stop with cleat at the perimeter edge was installed.  The work included new pre-finished metal gutters, and a new fixed roof ladder on the west side of the penthouse.  A new galvanized guardrail fall protection system with ballasted rubber-footed bases was installed to complete the project.

Three crane lifts were required to transport demolished roof debris from the roof and to bring the temporary fall protection scaffolding and new roof materials onto the roof.

LAWRENCE BERKELEY NATIONAL LABORATORY, BUILDINGS 50 AND 78 ROOF REPAIR

  • Client: Lawrence Berkeley National Laboratory
  • Location: Berkeley, CA
  • Date: 2016
  • Contract #: 7304623
  • Value: $420,655

Project Details

Cerrudo was awarded the design build contract to perform roof repairs at Buildings 50 and 78. Building 78 is a 5,675 SF single story structure built into the north side of a hill. The existing roof is a concrete deck with a fully adhered built up roof and gravel cover. The roof repair for Building 78 was initially designed as a three-ply modified roof system based on the RFP requirements. The client requested a change of design to a PVC membrane roof system so that the existing built up roof could remain.

The existing loose gravel was removed. Tapered insulation was adhered to the roof, then DensDeck primed recovery board installed over the tapered insulation.  A Duro-Last PVC membrane roof system was adhered to the recovery board. The perimeter parapets were raised and new two-piece perimeter edge metal installed.

The new Building 50 roof over the existing library, 2,208 SF, was designed with a fully-adhered PVC membrane system. The existing built-up roof membrane was tested and found to contain PCB’s. The membrane was removed by workers trained in PCB removal and containment. A DensDeck cover board was installed over the concrete and corrugated metal roof deck, and rigid thermal insulation adhered over the cover board. A 40 mil PVC single ply white fully adhered field membrane with water-based adhesive was installed over the insulation, heat welded at laps. New gutters, downspouts and roof ladder were installed.

US COAST GUARD BODEGA BAY DESIGN BUILD GALLEY CONSTRUCTION

  • Client: US Coast Guard
  • Location: Bodega Bay, CA
  • Date: 2015
  • Contract #: HSCG88-15-J-PQQ002
  • Value: $267,511

Project Details

Cerrudo Services provided the design and construction for the galley at Station Bodega Bay.  The design utilized the equipment that the Coast Guard had previously purchased and stored.  The new commercial kitchen is capable of preparing meals for up to 35 people.  The scope of work included:

  • New stainless steel casework, countertops, backsplash and storage components, and new freezer storage.
  • New hand wash sink, faucet and accessories including garbage disposal.
  • Reconfiguration of existing interior doors, windows and walls to increase efficiency of circulation, allow the operation of a serving line and provide adequate prep area.
  • New floor and wall tile.
  • Plumbing, mechanical, fire protection and electrical work required for a code compliant kitchen.

Cerrudo removed and disposed of all existing kitchen equipment, furnishings, flooring and finishes. The Government furnished exhaust hood included an integrated fire suppression system.  A new panelboard was installed to accommodate the increased electrical loads required by the new equipment.  The existing sewer pipe was replaced and extended.  All Government furnished appliances needed to be converted to propane use.

US COAST GUARD TRAINING CENTER, H COMPLEX MAINTENANCE AND REPAIR

  • Client: US Coast Guard
  • Location: Petaluma, CA
  • Date: 2015
  • Contract #: HSCG88-14-J-PFP444
  • Value: $2,232,354

Project Details

H Complex consists of seven buildings (122, 123, 124, 125, 126, 127 and 128).  Cerrudo Services furnished all materials, equipment and supervision for the maintenance and repair to the heating system, some electrical systems and architectural work on the H Complex.  The H-Complex was originally built as barracks for the Army in 1948.  Over time the occupancy use has changed to offices, classrooms, and barracks.

Cerrudo provided new radiant heaters for the bathrooms on the 1st and 2nd floor of Buildings 124 and 125.  New cabinet unit heater air terminal devices were installed at Buildings 122, 123, 124, 125, 127 and 128.  New units and associated piping, valves and controls with fresh air ducting from the modified louvered windows to the units were installed.  A new 4 ton roof mounted heat pump unit and distribution ducting at Building 127 with new electrical service and fused disconnect was installed. Cerrudo replaced cooler and freezer boxes including new subfloor and doors, refrigerant piping, valves, controls, compressors and evaporators at the Building 126 Galley.

New Men’s and Women’s bathrooms were constructed on the 1st and 2nd floor of Building 124 including the demolition of the existing rooms.  New work included plumbing fixtures, lighting, flooring and wall surfaces, bath accessories and exhaust fans.

Gutters, downspouts and roof access for Buildings 122, 123, 124, 125, 127 and 128 were provided.  Cerrudo replaced the south facing windows at Buildings 124 and 125 including repair of moisture damage.  New architectural fixtures and finishes were provided in Classroom Buildings 122 and 123.  New carpet tiles were installed where new work occurred.

DESIGN BUILD BAND ROOM CONSTRUCTION, USARC DRILL HALL

  • Client: US Army Corps of Engineers
  • Location: Los Angeles, CA
  • Date: 2015
  • Contract #: W91238-11-D-0031-0006
  • Value: $1,019,369

Project Details

Cerrudo Services was prime contractor for the design and construction of a standalone 2,860 SF Band Room within the existing Patton Drill Hall in Bell CA.  The rehearsal hall is an open space with an 18’H acoustical tile ceiling, acoustical panels mounted on the walls and carpet tile flooring.  In addition there is a storage room and three individual relocatable music practice rooms.

The new partitions were required to meet an acoustical value of 56 STC to isolate the sound and vibrations from the practice rooms and rehearsal room to the adjacent offices.  The space was designed to support optimal reverberation times for musical performances at mid-range frequencies (500-1000 HZ).

New roof top HVAC units were installed to service the rehearsal hall and the three practice rooms.  Each practice room has a separate, individually controlled HVAC unit with dedicated outside air.  The contract included the installation of a fully functional fire alarm and mass notification system throughout the two story 40,000 SF building as well as the new Band Room.

DESIGN BUILD ERECTION OF METAL BUILDING, DEFENSE DEPOT SAN JOAQUIN

  • Client: US Army Corps of Engineers
  • Location: Defense Depot San Joaquin, Tracy CA
  • Date: 2015
  • Contract #: W91238-11-D-0031-0005
  • Value: $409,481

Project Details

Cerrudo Services was prime contractor for the design and installation of a 3,750 SF pre-engineered metal shed structure on the north side of Warehouse 57-1 at Defense Depot San Joaquin.

The structure has fully operational lighting with occupancy sensors, speaker / strobes, sprinkler system with new riser for Type II construction storing ordinary combustibles and weatherproof receptacles for power and telecommunications.  The structure’s siding and roof panels are 26 gauge steel with a roof slope of ¼” per foot, with gutters, downspouts and skylights.  The structure is not attached to the existing warehouse; an expansion joint separates the two at the upper roof edge.

Fire sprinklers, electrical and data are originating within the occupied warehouse.  Piping, conduit and cable trays were installed within the warehouse to termination points at the north wall where they penetrate the exterior concrete panel.  The wall was X-rayed to confirm the location of the steel before drilling through the wall.

DESIGN BUILD REPAIR OF TRAINING CENTER, BEALE AFB

  • Client: US Army Corps of Engineers
  • Location: Beale AFB, CA
  • Date: 2015
  • Contract #: W91238-11-D-0031-0004
  • Value: $509,530

Project Details

Cerrudo Services was the prime contractor for the renovation of a 4,665 SF portion of the 3rd floor, Building 2145, including construction of five new classrooms.  The scope of work included demolition of existing walls, new gypsum board faced walls and demountable classroom partitions, replacement of ceiling tiles and carpeting, fire alarm and fire sprinkler relocation and addition, HVAC relocation, lighting relocation and new electrical and telecommunication outlets.

Building 2145 is a SCIF (sensitive compartmental information facility).  Barriers were installed to segregate construction workers from operational activities and to provide protection against unauthorized access and visual observation to secured building areas.  All workers and work were under the visual observation of Government escorts.  Electronic devices including cameras, cell phones, GPS devices and radios were prohibited in the building.

US COAST GUARD – ALAMEDA HOUSING REROOFING

  • Client: US Coast Guard
  • Location: Alameda, CA
  • Date: 2014
  • Contract #: HSCG88-12-J-PQQ068 and HSCG88-13-J-PQQ190
  • Value: $1,577,329

Project Details

Cerrudo Services provided re-roofing of housing units at the Coast Guard’s Marina Village housing complex.  The work was completed in two phases.  The first phase consisted of 18 housing units; the second phase of 44 housing units.

The existing asphalt shingle roofing was removed down to the roof deck.  Existing gutters and downspouts were removed.  Vinyl siding was removed where necessary to replace roof-to-wall flashing.  Damaged roof sheathing, wall insulation board, fascia board and fascia metal were removed as required.

New asphalt shingle roofing systems were installed including new soffit vent baffles between wood trusses, new eave edge vents, solar powered attic fans, and new gutters and downspouts.  Vinyl siding was replaced at roof to wall flashing and damaged roof sheathing was replaced.  Damaged wall insulation board, fascia board and fascia metal was also replace where removal of the existing flashing, gutters and roofing caused damage to the existing material.