Architectural Specifications

Scope of Work

All greenhouse parts, materials and equipment shall be furnished by the greenhouse manufacturer. Greenhouse installer shall erect the greenhouse and place all equipment. Masonry, flashing, plumbing, heating, electrical power (and control wiring), and utility connections shall be provided and installed by others.


Exterior framing shall consist of 6063-T6 aluminum extrusion alloy, supported by a hot-dipped galvanized steel sub-structure. The steel structure shall consist of truss-style ribs on 8’ 5 1/4” centers or 6’9”. Framing sections between steel ribs shall consist of 5 vertical rows of glass on 8’ 5 ¼” centers or 4 rows at 6’9” centers for 25’ & 30’ wide. Sidewalls posts shall attach to perimeter foundation 8” above floor grade, 8” thick or 9” thick depending on width of greenhouse to the depth required by local conditions and practice. (24” high walls or higher for snow zones and special applications may be used). All bolt screws, nuts and other fasteners used in the greenhouse shall be galvanized, stainless, plated or aluminum as required by manufacturer.

Design Load

American Classic Greenhouses can be tailored to meet any current building code for wind load and/or snow load. Stamped engineering calculations are available. Foundation kneewall width may change with engineering.


All glass shall be 1/8” double strength or 1/8” tempered glass. Roof glass is shingled with a 1/2” to 3/4” overlap, vertical glass shall be supported and separated by special vinyl extrusions. All glass shall be held in place with specially designed stainless steel clips. Glazing compounds used in the bedding of glass shall be butyl glazing tape with silicone caulking in certain areas. Clear insulated polycarbonate materials are available at additional charge. Insulated Glass is available at an additional charge but does not carry a warranty against seal break down.


The greenhouse shall have a continuous ball and socket hinge along either side of the ridge to facilitate a single vent along each side or end to end. Ridge vents are glazed with polycarbonate and are controlled by a thermostat and integrated into the overall climate control system. Side vents are available for special applications and shall be operated from a single point by a permanently lubricated worm gear driven chain vent machine that shall be manually operated.


Doors and frame shall be extruded aluminum shapes for hanging 1 ¾” thick tubular aluminum doors (1/ ¼” thick on smaller models). Doors shall be installed and pre-hung within 1 ¾” X 3” extruded aluminum framing at all openings to the size required.


Sill Plate
The sill plate shall be extruded aluminum shape approximately 2 ½” x 2”, permitting lateral security and sufficient adjustment to accommodate minor foundation irregularities.
Steel Frame
The hot-dipped galvanized steel frame is to be 3 X 4.1 channel. Welded 3/8” base plates to be secured to foundation with two anchor bolts each of the size specified on drawings.
The purlins shall be an extruded aluminum shape specifically designed for greenhouse use, weighing 0.912 lbs per foot.
The ridge shall be of extruded aluminum shapes designed to incorporate the ball and socket hinge for the roof vents, weighing 1.636 lbs per foot.
Glazing Bars
The glazing bars are an extruded shape weighing approx. 0.3 lbs per foot measuring- 1 1/8” x 1 ¼”, designed to receive stainless steel glazing clips.


Adjustments to standard models are available upon consultation.


The erection and glazing of the greenhouse and setting of climate control equipment shall be as specified in the order.


Greenhouses are shipped to your jobsite within the United States via motor freight, FOB Fort Worth, TX.

International greenhouses are shipped via motor freight, FOB Fort Worth, TX to your choice of exporter within the 50 United States.


Available for each greenhouse nationwide by our skilled and professional factory installation team. The installation team will meet the motor freight carrier and unload at your jobsite. Call for quotations.