- -Metal
Tube Greenhouse Construction: Design-Install
Guide &
Samples
- -
- -This
greenhouse frame is constructed from 16 gauge, 1-1/2" square,
galvanized steel tube.
- -All
angle and straight cuts were made and then the tube was
painted.
Next, 4" to 6" lengths
- -
of pressure treated 2x2's
were tapped into ends of tubes and cut off flush with end of
tube.
- -
- -Tube
end to be attached to the foundation is left open.
-
- -For
attaching studs to foundation, 1-1/2" square (actual size) treated
blocks were fastened
- -to
foundation board with deck screws, via a pre drilled hole in the
center of the block.
- -See
Framing
layout for Polycarbonate
for proper spacing.
- -
- -Joinery
was done by first drilling into steel and pinning wood blocks to
tube ends with set
- -screws.
Next tubes are drilled prior to setting galvanized deck screws at
key locations for
- -secure
attachment of joints
- -
- -Wood
ledger board is set at upper end of roof for convenient attachment
of rafters.
- -
- -Top
plate of front wall is actually a flat steel bar that is fastened
to inner surface of tubes.
- -
- -L-shaped
deck clips were used at corners for additional reinforcement. We
recommend
- -clips
at both sides of studs, where stud attaches to foundation board. s
is
- -an
important addition to ensure structural stability, and is a key
factor for code approval.
- -A
little over design never hurts. Polycarbonate is a covering
material and is not structural.
- -
- -The
most labor intensive part of process is cutting the tube&
drilling for screw placement.
- -The
end result is a narrow profile structure that will not be effected
by moisture.
- -
- -Another
option is mill finish, or prefinished, 1.75" square aluminum tube
with 1/8" wall thickness.
- -2x2
will slide into the tube easier than with steel. One idea is to
coat the inner walls of the tube
- -with
an exterior grade construction adhesive, slip in the 2x2 and let
dry overnight. Liquid
Nails
- -brand
is available at lumberyards.
Use same approach with 2x4
inserts & proper sized tube.
- Note:
The above mentioned
construction techniques have been relayed to us by the builder.
Sundance Supply has not built a structure of this design and can
not confirm strength of design or ease of construction. Quality of
craftsmanship and joinery design will effect strength of
structure. Following our procedures for attaching polycarbonate to
the frame will ensure a proper strong covering, but in no way can
we ensure the integrity of your frame construction. As usual, we
recommend applying for a building permit. The plan review and
inspection process will typically provide necessary structural
safeguards. Best of luck with your project.
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