Step 11
Screw the screweye into the marker hole on the underside of the door. This may be a good opportunity
to double-check the swing of the door to insure it doesn’t bind against the finished frame.
Assembling Strings & Treads
Lay out the strings on the ground or on trestles, with the guide channels on
the bottom and facing outward (as drawing right)
Step 12
Step 13
The treads are precision cut to act as spacers, holding the outside width of the
stairs at a constant measurement. They should fit snugly into the rebates,
grooved side up. Start at the bottom of the the stairs and install
all but the top
tread
.
Please note the top tread is deeper than the others
. Attach each tread to the
strings with No.10 x 1½"CSK screws, after first drilling pilot holes into the ends of
the treads, using a 3mm bit through the pre-drilled holes in the strings.
Guide
Channels
Top Stops
Slide Bar
Catch
Pin
Fork
Door Guide Frame
Step 14
Before lifting the stair section, install the
door guide frame
(no.10) into the guide
channels on the outside of the strings. Be sure the FORKS POINT DOWNWARDS
and the catch pin is on the left side of the string. Slide the Door Guide Frame all
the way to the bottom of the stairs. DO NOT FORCE, as this may spread the bars
or damage the brackets.
.
Step 15
Lift the stairs up to the
header guide frame
(No.5) into the guide channels on
the outside of the strings. Make sure the slide bars are seated in the guide
channels.
DO NOT FORCE the slide bars of either the
door guide frame
or the
header guide frame
over the edge of the ladder as this may also spread
the bars or damage the brackets
. Fix top tread. Fix top stops with M6 x 30mm
bolts and M6 nuts.
Step 16
To install the top tread, ask a helper to push and hold the stairs up to where their position on the strings clears
the attic floor. Install the tread in the same manner as the other treads (Steps 12 and 13), but please note the
top tread is deeper (184mm). At the same time, the top stops may be fitted using M6 x 30mm bolts and M6 nuts
through the pre-drilled holes.
For sizes 1-3
Lower the stairs until they touch the floor and the treads are level. Measure the section of the ladder above the
floor level and cut an equal length off the bottom of the strings. Depending on the tread position, it is possible
to take or leave up to 50mm extra if required.
6
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