Velux GGU INTEGRA User Manual download pdf (Page 48)

Special installation conditions

48 VELUX

If the window is wider than the distance between the rafters, it

may be necessary to install trimmers in the rafter construction.

In most cases when installing a trimmer to support a single rafter,

the solution is based on experience. Most often the trimmer has the

same dimensions as the rafters.

Note! Some constructions may require static calculations of the

load capacity of the new trimmer and remaining rafters.

Special conditions to consider:

• A large roof surface above or below the trimmer

• Existing trimmers in the roof construction close to trimmer

• Possible special support conditions of remaining rafters

For combinations of more windows side by side, it is often possible

to adjust window width and frame distances between the windows

in order to retain rafters. This must be determined before ordering

ﬂashings.

Recommended distances to rafters to allow for eective insulation

around the windows.

20-30 mm 20-30 mm

Trimmers

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 151 152

No comments

Velux GGU INTEGRA User Manual Page 48