©Spirafix Limited 2009, All Rights Reserved
"U" Bracket Fixing
(26-51mm Outside Diameter)
"U" Bolt
Bracket (018)
Tube
Elevation
Side
Elevation
Plan View
SpirafixT
M
"U" Bolt
M12
Setscrew &
Washer
SpirafixT
M
Typical "L" Bracket Arrangement
M12
Setscrew &
Washer
SpirafixT
M
or
Coachscrew
Cup
Square
Bolt
"L" Bracket & Coachscrew Fixing
Shed,
Temporary
building etc.
Coachscrew, M12 x
50mm (min. length)
& Flat Washer.
SpirafixTM &
Bracket (002)
Elevation
In the case where there is no access at the
rear of the timber, suitable coachscrews can
be used (12mm diameter). It is recommended
that they be inserted along the centre-line of
the timber as shown above.
This anchoring system is suitable for steel box
section (RHS) type furniture. The standard
brackets are not needed for this application.
The section must be drilled as shown opposite
to provide four clearance holes at each corner
on the lower sections and four access holes
directly above. The large OD mudguard washers
must be used to span the 20mm diameter
holes.
Steel Furniture Leg Fixing Arrangement
(without Bracket - 50mm wide RHS minimum)
Plan View
42mm dia. hole to accept
standard tube cap.
Open or closed end
M12 Setscrew and
large washer.
18mm dia. hole for
SpirafixTM entry.
Side View
(Section)
For calculating the number
of SpirafixTM needed to
carry the vertical load, use
the lower values given in
the performance data
table.
Raise joists off ground by approximately 25mm to
avoid them absorbing moisture and to prolong life.
Inclined Joist
(steps etc.)
25mm
Recommended Joist Fixings with "L" Bracket
Elevation
General Notes on Using SpirafixTM Anchors
The SpirafixTM ground anchoring system works
best with objects that are free standing and
that have a degree of rigidity in their own
structure. Prime examples are seats, picnic
benches, five-a-side goal posts, sheds, kennels
etc..
Using SpirafixTM with an object that has a small
footprint (less than 1metre square) is not
recommended, especially if it is taller than 1
metre.
The key to ensuring that the system operates
at maximum efficiency is to tighten the
setscrews adequately. A 19mm across flats
wrench that has a handle of between 250mm
to 300mm long, when used by a person of
average strength, should deliver enough
torque to do this. Overtightening may damage
the threads on the setscrew.
There are two different head types on the anchors. The “A” type is the original head and is used most widely. The general method of
installation is to mark out the ground where the anchors are needed by using wooden pegs or any other item that can be pushed into
the ground. An anchor is driven in at each point where there is a marker and then the structure is either placed over the anchors or,
if “L” brackets are being used, then they are located over the anchors and then fastened to the anchor and the structure using
screws. See the first diagram below on the left to get me off the hook from explaining further! The bolted method used by the “A”
types gives the most secure fixing off the types in use.
However, the “C” type head is easier and quicker to use and is better suited to temporary uses where structures are being erected
and then dismantled regularly. This applies mainly to events where, for example, mobile horse jumps are being used. The mobile
structure is fitted with a bracket that has a slot through which the anchor can be passed. The item to be fixed is placed in position
and then “nailed” to the ground by driving the anchor through the slot until the underside of the head touches the bracket. At this
point it cannot go any further. The slot in the bracket prevents the anchor from rotating and therefore it cannot come back out of
the ground unless it “breaks out”. See the 50mm Diameter “C” Type page for further details.
Products > SpirafixTM Anchors > Fixing Methods
