Portable Office Building Specifications

General Engineering Specifications

Starrco’s pre-assembled buildings are designed to provide years of maintenance-free service. The structural members are either powder coat painted aluminum or steel with a rust retardant finish. Walls, ceiling and floor have a solid impact-resistant core with a durable aluminum or vinyl-covered finish. Windows and sliding doors are aluminum finish, swing doors are commercial grade steel.

The model number of the building indicates it’s approximate size. (i.e. Model #46 is 49” wide x 78” long). The overall height of the building will be a nominal 90” with an interior height of 82”.

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The loading characteristics of the buildings are:
Snow Load: 30 PSF
Wind Load: 30 PSF (110 MPH Maximum)
Floor Load: 50 PSF



Structural members for corners are 3” x 3”, ¼” aluminum angle. Structural members between panels are 4” x 2½”, 3/16” aluminum “T” extrusion. Top frame will be 2 ½” x 2 ½”, 3/16” aluminum angle. All aluminum structural members will be 6063 alloy, T6 temper, finished with grey powder coat paint.



Wall panels are a minimum ¾” thick sandwich construction. Exterior of panel is smooth white painted aluminum laminated to high-density OSB board. Panel interior will be 1/8” gray vinyl covered hardboard. Panels will be caulked with a urethane sealant and fastened to structural members with plated screws


Ceiling panels are a minimum ¾” thick sandwich construction. Interior of panel is 1/8” white vinyl-covered hardboard laminated to high-density OSB board. Top of panel will have an aluminum vapor barrier.



The building base will be 4” structural steel channels, welded, with stringers on maximum 24” centers. Base includes forklift pockets. Steel channels will be painted with a rust inhibitive paint. Sub-flooring is two layers of 5/8” OSB board with aluminum vapor barrier laminated underneath. Finished floor will be commercial grade seamless vinyl.



On buildings 4’ wide or less, the roof will ship installed on the building. Installed roof consists of .060” EPDM membrane laminated to ceiling panels with aluminum gutters on all four sides.

On buildings larger than 4’ wide, roof consists of flat standing seam aluminum pans. Perimeter of roof will be anodized aluminum gutters and fascia trim. Roof is shipped knocked-down, ready for on-site assembly by others.


Windows will be single sliding aluminum with locking device. Sliding sections are glazed with 1/8” clear tempered safety glass. All window framing is finished with white powder coat paint.

Doors (Swinging): Door will be a commercial-grade 3068 20ga. steel with a 1/8” tempered safety glass window in top half. Door includes 1 ½ pair of 4 ½” x 4 ½” ball bearing hinges and a stainless steel key-in-knob lockset. Door will be mounted on an anodized aluminum door frame with wool pile weatherstrip. Door is painted white.


Doors (Sliding)

Door will be 6070 aluminum patio sliding type. Doors will be glazed with 3/16” tempered safety glass in upper section and have a solid panel in lower section.

Keyed locking device with pull handle is included. All aluminum door parts are anodized with 202R1 clear finish.

Buildings with a model number ending with “-1” indicate two sliding doors are included on the long walls.



Pre-wired electrical package includes one 125v duplex receptacle, one 230v single receptacle, T8 fluorescent lighting with lens, and one 120/240v single phase 125 amp circuit breaker box. All electrical components and wiring conform to National Electrical Code.


All Starrco pre-assembled buildings can be custom fitted to meet a variety of needs. Available options include:

  • Air Conditioning and Heating
  • Exterior Lighting
  • Thermal Insulation
  • Custom Painted Exterior
  • Special Glazing (Tinted, Insulated, Polycarbonate, etc…)
  • Countertops and Shelving
  • Standard or Thru-Wall Cash & Transaction Drawers
  • Aluminum Treadplate Flooring

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