Steel
Quality
|
Steel
towers
supplied
by
Lansford
are
made
of
top
quality
prime
grade
steel.
The
very
cheap
towers
sold
by
some
companies
and
individuals
are
normally
made
of
scrap
steel.
|
“Made
to
British
Standards”
|
Beware
of
suppliers’
claims
about
this.
False
claims
by
less
reputable
suppliers
are
very
common.
The
British
Standard
for
scaffold
towers
&
tube
is
BS1139:1994
(HD1004)... [ recently changed to European Standard EN1004 ] which
applies
only
to
industrial
towers.
|
Tower
Strength
&
Stability
|
The
two
main
factors
which
affect
the
strength
and
stability
of
a
tower
are
a)
metal
thickness
-
the
“gauge”
of
the
tube.
The
higher
the
number,
the
thinner
the
metal
i.e.
18g
is
thin
(just
over
1mm
thick)
and
12g
is
very
thick
(just
over
2.5mm
thick).
Lansford
do
not
use
18g
tube
in
tower
vertical
columns
because
we
believe
this
is
too
thin
for
safety
and
durability.
b)
tube
diameter
-
as
a
general
rule
the
greater
the
diameter
of
tube
in
the
verticals,
the
more
stable
is
the
tower.
|
Platform
/
Working
Height
|
Know
the
difference
between
these
terms. WORKING HEIGHT
is
taken
as
the
height
of
the
platform
plus
an
average
person’s
reach.
Lansford
always
shows
PLATFORM HEIGHT
because
it
is
the
most
accurate
and
meaningful
measurement. This will be the height of your FEET above the ground. All
towers
supplied
by
Lansford
have
safety
guardrails
which
extend
above
the
platform
height. TOWER HEIGHT is used by a few tower suppliers but this
includes the height of the guardrails (if supplied) and in our opinion is stated
to mislead customers into thinking they are getting a taller tower than is
really the case.
|
|
Height
Required
|
Check
the
height
you
require
where
possible
by
measuring
with
a
tape,
length
of
string
etc
or
by
counting
the
brick
courses
and
multiplying
by
depth
of
one
course.
Most
people
grossly
over-estimate
heights.
Note
:
an
average
eaves
level
is
15-17ft.
An
average
gable-end
is
24ft.
Remember
you
will
want
to
stand
(platform
height)
about
5
-
6ft
below
the
point
you
need
to
reach.
Consequently,
if
your
eaves
are
at
16ft
you
will
want
a
platform
height
of
10ft
-
12ft.
|
Plan Size (or Base Size)
Required
|
STABILITY -
Many people seem to think that a 6' x 4' Base Size tower will be more stable
than a 4' x 4' tower. The stability of a tower is affected by many
factors but it is the size of the
SMALLEST dimension (width) which determines stability most. Basically a 6' x 4'
tower is no more stable than a 4' x 4', though both are more stable than a 2'
wide tower.
RECTANGULAR TOWERS v SQUARE TOWERS -
The disadvantage of all rectangular steel towers (6'x4', 6'x2', 4'x2') is that
because of the alternating frame size at each lift (pair of frames), platform
boards will only fit at every-other lift, not at EVERY lift as with a square
tower (4' x 4'). Also, rectangular tower kits will start with a different
sized pair of frames at the bottom depending on the final platform height
required. Some heights need to start with a pair of long frames, alternate
heights will need to start with a pair of shorter frames.
LANSFORD ADVICE -
We suggest that for the sake of simplicity and versatility, customers choose a
4' x 4' square tower wherever possible. Narrow 2' wide towers will always
have their place in restricted width situations, as will the longer 6'x4' towers
for certain types of work, but we advise customers to only choose rectangular
towers when they have a good reason. If a 4' x 4' tower will fit - go for
it! You can always add a few extra 2' or 6' components to convert it into
a narrower or longer tower for the situations where this is necessary.
|
Using Stabilisers (Outriggers)
or Tying-In
|
As a rough rule
of thumb,
4' wide towers will need to have their stability increased by adding stabilisers
(or tying-in) above a platform height of about 12ft.
2' wide towers will require this above a platform height of about 6ft.
More information and guidance will be found at the bottom of the
"Components List" pages of both Domestic Towers (click
here) and Saturn Towers (click here).
Scroll down these long pages for the details.
|
Helping
You
Choose
|
Our
aim
is
to
help
you
choose
the
right
tower
for
your
needs.
We’ve
been
helping
people
choose
scaffold
towers
for
over
30
years
so
choosing
Lansford
is
choosing
wisely!
If you think of
any useful tips which we have not included here but would have helped you
choose, please let us know. We would welcome your assistance in improving
this page. You can email us by clicking the link at the bottom of any
page.
|