Fireproof building element

Claim 2

Fire proof building element with a multi-sheet glazing unit of glass or glass ceramic characterized in that at least one of the glass sheets of the multi-sheet glazing unit is a fire resistant glass sheet consisting of a glass whose product of the thermal expansion unit α (20°-300° C.) and elasticity module E is between 1 and 5 (kg/cm 2 ·°C.), the distance between the sheets being between 2 mm and 150 mm, and characterized in that the building element contains one or more high heat reflective foils arranged between the sheets at a distance from the fire resistant glazing unit, the high heat reflective foil reflecting over 90% of the radiation, and also characterized in that the high heat reflective foil is put in a rolled up form or in a folded form between the two sheets of the building element such that the visible area is not covered and which can, in the event of a fire, be spread out completely between the glass sheets.

Claim 3

Fire proof building element according to claim 1 wherein the fire resistant glass sheets are designed to prevent passage of flame and smoke for 60 minutes, and wherein the building element including its mountings, fasteners and joints are resistant to the action of fire such that they remain workable as room closures and let neither flame nor smoke pass through during a 60 minute fire trial consistent with German Industrial Standard 4102.

Claim 4

Building element according to claim 1 characterized in that the fire resistant glazing unit consists of wire reinforced glass or wire-mirror glass (calcium-sodium glass).

Claim 5

Building element according to claim 2 characterized in that the fire resistant glazing unit consists of a glass ceramic wherein the product of the thermal expansion value, α (20°-300° C.) and elasticity module E, is smaller than 1 (kg/cm 2 ·°C.).

Claim 6

Building element according to claim 1 characterized in that the fire resistant glazing unit consists of glass sheets whose product of the thermal expansion unit α (20°-300° C.) and elasticity module E is between 1 and 5 (kg/cm 2 ·°C.) and which are put into the area of the frame by partial hardening under a compressive stress.

Claim 7

Building element according to claim 1 characterized in that the glass sheets consist of a glass whose softening point (η=10 7 .6 poise) is above 750° C.

Claim 8

Building element according to claim 1 characterized in that the glass sheets consist of a glass strengthened by upper surface crystallization.

Claim 9

Building element according to claim 1 characterized in that the glass sheets in the area of the frame of the sheet or on the total upper surface possess a crystalline upper surface layer with a lower thermal expansion value than the value of the base glass.

Claim 10

Building element according to claim 1 characterized in that, besides the fire resistant glass sheet, it has multi-glass sheets of one or more synthetic layers laminated together, which laminate is fire resistant.

Claim 11

Building element according to claim 1 characterized in that it is filled with a gas which has a thermal conductivity less than the thermal conductivity of air.

Claim 12

Building element according to claim 1 characterized in that the sheet away from the fire is thicker than the sheet toward the fire.

Claim 13

Building element according to claim 1 characterized in that this means for the automatic spreading of the foil is so arranged that it either responds to an increase in the environmental temperature or to an increase in the pressure between the sheets.

Claim 14

Building element according to claim 1 characterized in that the high heat reflective foils are fastened with their one end to an upper inner side of the frame between two sheets and that the foils rolled up or folded from bottom to top rest on a mounting support, which support has means which is activated through a completely automatic release mechanism in the case of a fire so that the foils are unrolled between the sheets by gravity.

Claim 15

Building element according to claim 13 characterized in that the foils are fastened at their other end on rods on which they are wound up.

Claim 16

Building element according to claim 14 characterized in that it contains two foils which are led around a common rod by joining together their other ends in a loop-type arrangement and the foils are rolled up on the rod.

Claim 17

Fire proof building element with a multi-sheet glazing unit of glass or glass ceramic characterized in that at least one of the glass sheets of the multi-sheet glazing unit is a fire resistant glass sheet and that the building element contains at least one high heat reflective layer or contains one or more high heat reflective foils arranged between the sheets at a distance from the fire resistant glazing unit, characterized in that the fire resistant glazing unit consists of glass sheets whose product of the thermal expansion unit α (20°-300° C.) and elasticity module E is between 1 and 5 (kg/cm 2 ·°C.) and which are put into the area of the frame by partial hardening under a compressive stress characterized in that the sheet away from the fire is thicker than the sheet toward the fire and the distance between the sheets is between 2 mm and 150 mm, also characterized in that the glass sheets consist of a glass that shows a strong curve at the upper surface crystallization, and characterized in that the glass sheets in the area of the frame of the sheet or on the total upper surface possess a crystalline upper surface with a lower thermal expansion value than the value of the base glass, the building element being filled with a gas which has a thermal conductivity less than the thermal conductivity of air, and also characterized in that the high heat reflective foils are made of aluminum or gold which reflect over 90% of the radiation, and also characterized in that the high heat reflective foil is put in a rolled up form or in a folded form between the two sheets of the building element such that the visible area is not covered and which can, in the event of a fire, be spread out completely between the sheets.

Claim 18

Fire proof building element with a multi-sheet glazing unit of glass or glass ceramic characterized in that at least one of the glass sheets of the multi-sheet glazing unit is a fire resistant glass sheet and that the building element contains at least one high heat reflective layer or contains one or more high heat reflective foils arranged between the sheets at a distance from the fire resistant glazing unit, characterized in that the fire resistant glazing unit consists of glass sheets whose product of the thermal expansion unit α (20°-300° C.) and elasticity module E is between 1 and 5 (kg/cm 2 ·°C.) and which are put into the area of the frame by partial hardening under a compressive stress characterized in that the sheet away from the fire is thicker than the sheet toward the fire and the distance between the sheets is between 2 mm and 150 mm, also characterized in that the glass sheets consist of a glass that shows a strong curve at the upper surface crystallization, and characterized in that the glass sheets in the area of the frame of the sheet or on the total upper surface possess a crystalline upper surface with a lower thermal expansion value than the value of the base glass, the building element being filled with a gas which has a thermal conductivity less than the thermal conductivity of air, and also characterized in that the high heat reflective foils are made of aluminum or gold which reflect over 90% of the radiation, and also characterized in that the high heat reflective foil is put in a rolled up form or in a folded form between the two sheets of the building element such that the visible area is not covered and which can, in the event of a fire, be spread out completely between the sheets.

Claim 19

Building element according to claim 16 characterized in that it has a means through which the high heat reflective foils can be spread out in case of a fire completely automatically between the sheets.

Claim 20

Building element according to claim 17 characterized in that this means for the automatic spreading of the foil is so arranged that it either responds to an increase in the environmental temperature or to an increase in the pressure between the sheets.

Claim 21

Building element according to claim 16 characterized in that the high heat reflective foils are fastened with their one end to an upper inner side of the frame between two sheets and that the foils rolled up or folded from bottom to top rest on a mounting support, which support has means which is activated through a completely automatic release mechanism in the case of a fire so that the foils are unrolled between the sheets by gravity.

Claim 22

Building element according to claim 19 characterized in that the foils are fastened at their other end on rods on which they are wound up.

Claim 23

Building element according to claim 20 characterized in that it contains two foils which are led around a common rod by joining together their other ends in a loop-type arrangement and the foils are rolled up on the rod.