DE202006009605U1 - BKR-box-type rib for blackboard construction, has front and support belts arranged parallel to one another with variable distance and connected with bars at both sides, where hollow space formed between belts is filled with insulation - Google Patents

Abstract

The rib has front and support belts arranged parallel to one another with a variable distance and connected with bars comprising Purenit-plates, at both sides. A hollow space formed between the belts is filled with insulation. The belts are made up of construction solid wood KVH-NSI (RTM: Not defined). The rib is of three different standard types such as light, middle or strong with 80 millimeter wide. The plates are fastened on the belts with aluminum groove nails.

Description

The BKR box rib is a further development of known rib types in wood construction. Components are the straps made of structural wood; Fassadengurt (6 / 4.5 KVH) Carrying strap (6 / 8-10-12 KVH), as well as the webs made of Purenit. The bars are applied to the straps with aluminum grooved nails. The box rib is filled at the factory with a freely selectable insulating material.

purenit is made of recycled polyurethane. The production is CFCs as well as HCFC-free.

purenit is a construction material with high thermal insulation capacity in conjunction with a for one insulation high strength.

The Material is recyclable, as well as with all woodworking machines editable. By nailing the bars with aluminum nails are The ribs can be easily shortened on site.

advantages

• • höherer Wärmedurchlasswiderstand wie bei den bekannten Systemen.
• • hohe Tragfähigkeit durch die mittragenden Stege.
• • keine unterschiedlichen Dämmstärken im Gurt und Stegbereich.
• • einfache Anschlüsse seitlich an den Rippen durch eine beidseitige Beplankung in voller Rippenhöhe
• • Dämmmaterial nach Wunsch

The main advantages of the BKR rib are:

• • higher thermal resistance as in the known systems.
• • high load capacity due to the supporting webs.
• • no different insulation thicknesses in the belt and web area.
• • Simple connections on the side of the ribs through double-sided planking at full rib height
• • Insulating material as desired

use

The BKR rib is for now the use in wood panel construction, in particular provided in the area of the walls.

In Another development step is the use as a bending beam (rafters, Ceiling beams) conceivable.

dimensions

The width of the ribs (straps + webs) is 80mm. There are four rib heights available:
200mm, 240mm, 300mm and 400mm

Load capacity

The Ribs were with a for the webs modified area calculated. Since the modulus of elasticity of the webs is smaller than the modulus of elasticity of the Straps is, was the area the bridges in proportion reduced the moduli of elasticity.

The modulus of elasticity of Purenit webs is estimated in advance. Assumption 5500 N / mm ² .

All rib heights are available in three load capacity levels (rib spacing 62.5cm, service class I, load duration medium) L (light) F _{c, 90, R} = 30.2 KN / m M- (middle) F _{c, 90, R} = 34.5 KN / m M- (strong) F _{c, 90, R} = 38.7 KN / m

The Details refer to a 1m long piece of wall.

Thermal resistance

Of the Thermal resistance is chosen by the Thermal insulation dependent.

When installing a thermal insulation with the thermal conductivity group 035, the following U-values for the entire wall (rib and Gefachdämmung) result:
(Rib spacing 62.5cm, WLG 035, no contact resistance taken into account, no skins considered) 200-L 0.190 W / m ² · K 240-L 0.156 W / m ² · K 300-L 0.122 W / m ² · K 400 L 0.091 W / m ² · K 200-M 0.195 W / m ² · K 240 M 0.158 W / m ² · K 300-M 0.124 W / m ² · K 400-M 0.091 W / m ² · K 240-S 0.161 W / m ² · K 300-S 0.125 W / m ² · K 400-S 0.092 W / m ² · K

Attachments

• Calculation of the load capacity
• Calculation of U-values
• Drawing standard types-1
• Drawing standard types-2
• Drawing nailing the webs

Claims (6)

BKR box rib, characterized in that the box rib consist of a facade belt and a support belt, which are arranged in parallel with a variable distance and are connected with webs on both sides, wherein the cavity between the straps is filled with insulation. Device according to claim 1, characterized in that that there are three different standard types of box rib (Light (1), Middle (2), Strong (3)), with all ribs totaling 80mm are wide. The box ribs of the standard types Light and Middle are 200 mm, 240 mm, 300 mm and 400 mm high respectively, the standard type ribs S be with the heights 240 mm, 300 mm, 400 mm. Device according to Claims 1 and 2, characterized that the facade belt made of KVH-NSI construction timber, with the moderation 60 × 45 mm for all three standard types exist. Device according to claims 1 to 3, thereby in that the carrying strap is made of solid construction wood KVH-NSI, with dimensions 60 × 80 mm for the Standard type Light, 60 × 100 mm for the standard type Middle, 60 × 120 mm for the standard type Strong. Device according to claims 1 to 4, characterized that the webs for connecting the belts consist of Purenit plates. Device according to claims 1 to 5, characterized that the bridge plates are fastened to the straps with aluminum grooved nails 4-40 becomes.