fakro LWS-P 22/47, Installation Instruction

W

Fig.18. 

W

- Distance between the ceiling joists.

D1

stringer

D1=D2

D2

header

nails

header

Fig.19. 

VIII. INSTALLATION OF THE TEMPORARY SUPPORT BOARDS

Before you begin:

The frame around the ceiling opening must be finished.

STEP 1

Using 4 nails or screws attach the temporary support board 1

Ē

x

4

Ē

x 36

Ē

 where the hinged end of the ladder will be installed.  This

temporary support board must form a 1/4

Ē

 ledge across the

ceiling opening (Figure 20).

Note:

It is recommended to use double headed nails which can be easily

removed.

STEP 2

Using 4 nails or screws, attach the second temporary support at

the other end of the opening so that the temporary support boards

are 

ď

X

Ē

 inches apart (table 3).

CAUTION:

Check the distance between the temporary support

boards, it must be equal to the values given in table 3 and fig. 20.

The attic ladder can fall down if the temporary support boards are

spaced incorrectly.

MODEL

X - distance between headers

LWS-P 22/47
LWS-P 25/47

46-1/16

Ē

46-1/16

Ē

LWS-P 22/54
LWS-P 25/54

52-7/8

Ē

52-7/8

Ē

Table 3

X

X

temporary 

support boards

1/4" ledge along hinged side

screws or nails

Fig.20. Installation of temporary support boards.

X

1/4"

temporary support boards

Installation of stringers

STEP 1

Measure the length of the stringer 

ď

W

Ē

 between the cross-beams

(Figure18).  The measurement should be perpendicular to the headers.

STEP 2

Cut the stringer to size.  Use timber similar in size to the existing

ceiling joists.

STEP 3

If the joists do not make up the other two sides of the frame, you

need to install one more stringer of the same length as before.  On

Figure 18 only one stringer is needed because the ceiling joist

makes up one side of the frame.  

STEP 4

Position the stringer (or stringers) along the unframed side if the

ceiling opening (Figure19).  The inside dimensions of the frame

should be equal to the ceiling opening (see product label or table

2 on page 5.

STEP 5

In order to install stringers to the headers you should use nails long

enough to go through both cross-beams and enter the stringer at least

1

Ē

.  In most cases it should be 20d nail 4

Ē

 long.  Square the stringer

and drive 3 nails at each end through the double header. Both

measured dimensions should be within 1/8

Ē

 to consider them equal.

9