Device i.e. sideboard, for forming access path above roof void insulation, has three lintels made of same material, and inner opening zone for installing device on roofing framework, where boards are fixed on lintels by metallic fasteners
摘要
<p>The device has three lintels (3-5) made of same material, and an inner opening zone for installing the device on a roofing framework, where the device has width of 31 cm, height of 35 cm and thickness or depth of 6.5 cm. Two parallel boards are fixed individually on the lintels by metallic fasteners (6).</p>
