DE1092636B - Glazing beams made of concrete, especially prestressed concrete, for greenhouses - Google Patents

Description

GERMAN

The glazing of greenhouses is known to be supported by columns, rungs, rafters or the like. carried. The use of wood as a carrier of the glazing is uneconomical because of the low Lifespan of the wood in the warm, humid greenhouse climate. Iron structures tend to particularly strong condensation and rust formation and cause due to the good thermal conductivity significant heat losses from iron. In modern greenhouse construction, putty strips are used instead provided supports, rungs, rafters ad. Like. Made of concrete, especially prestressed concrete, as a carrier for Glazing used. These concrete beams are weatherproof.

But even when using concrete beams for the glazing, there is still a tendency to heat losses and condensation, as the concrete girders with their concrete blocks are cold bridges represent. If this condensation also affects the glazing supports little or no is harmful, the falling drops of condensation water cause damage to sensitive ones Cultures. However, mineral components can also be dissolved out by the condensation the concrete beams from these play a certain disadvantageous role.

It is known per se in structural engineering to prevent the formation of cold bridges by concrete girders avoid that one provides the concrete beams with sheaths made of heat-insulating materials, which also can be nailed in order to attach other components to them. Such a measure comes for the numerous Concrete supports for greenhouse glazing are out of the question for economic reasons. the Such a measure would cost the use of concrete beams as glazing beams for Practically question greenhouses at all.

It is also known in construction engineering to nail concrete beams on an outside with, if necessary to provide dovetail profiled embeddings, the material of which is heat-insulating and is sometimes more or less weatherproof. These deposits serve primarily for attaching further components to the concrete girders, the glazing girders, which are never provided with filler strips represent.

To now the economical use of concrete beams in greenhouse construction while avoiding them at the same time of heat loss and condensation on glazing supports provided with filler strips To enable concrete is proposed according to the invention, instead of the known Concrete filler strips that are made in one piece with the carrier, special filler strips made from heat-insulating glazing carriers concrete,

especially prestressed concrete,

for greenhouses

Applicant:

Otto Debus,

Schlierbach via Gladenbach (Hess.)

Otto Debus, Schlierbach via Gladenbach (Hess.),
has been named as the inventor

to arrange the weather-resistant building material, each one engaging in the outside of the carrier Have feet and are firmly connected through this with the carrier.

The foot of the putty bar can be concreted in the carrier. The foot can also be profiled in cross section be, for example dovetail-shaped, and be inserted into a corresponding groove of the carrier. In a further embodiment of the invention, the putty bar can have strip-shaped approaches on both sides be provided which cover the outer surfaces of the carrier and together with the outward facing Part of the putty bar at the same time form the putty beds.

As a heat-insulating, weather-resistant building material for the putty strips, for. B. one of the in the trade Building materials known under the protected trade names “Eternit” and “Fulgurit” are used. The glazing and the insulating covers of the outside of the concrete beam through the The putty bar and the putty then result in a cover that protects the concrete beam against hypothermia, which prevents the formation of condensation and at the same time reduces heat loss.

Two embodiments of the invention are shown in the drawing. It shows

1 shows a cross section through a known glazing support provided with a cement strip Concrete and the subsequent glazing,

FIGS. 2 and 3 show two exemplary embodiments of glazing supports made of concrete according to the invention, with the following Glazing, also in cross section.

As FIG. 1 shows, the known glazing support 1 is made of - optionally with tension wires Reinforced - · Concrete provided with a protruding putty strip 3 on its outside. The putty bar 3

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and the adjacent outer sides of the carrier 1 together form cement beds 2 for the glass panes 4. The cement 5 of the glass panes 4 ends with the outer side 3σ of the cement strip 3. By Kittleiste 3 of the concrete beam 1, in particular of a prestressed concrete beam 1, a considerable heat exchange between outside air and greenhouse interior is possible as a result of the relatively large thermal conductivity, not only heat losses, but in low outdoor temperatures and to a sub-cooling of the concrete beam 1 and thus condensation on him leads. A putty bar 3 should not be dispensed with either, since it forms a lateral support for the putty 5 in a simple manner as well as protecting it against mechanical damage.

According to the invention, to avoid condensation and heat losses in the embodiment of FIG Concrete carrier 1 forms the cement beds 2 for fastening the glass panes 4. The cement strip 6 as well as the glass panes 4 and the cement 5 together form a heat-insulating outer cover for the respective concrete beam 1, so that heat losses through this are reduced and its undercooling in connection with condensation is avoided.

In the exemplary embodiment according to FIG. 3, a specially profiled mastic strip 7 is provided as a heat-insulating one-piece outer covering of the concrete beam 1. The putty bar 7 is embedded with its dovetail-shaped foot 7 a in a corresponding groove 8 of the concrete beam 1 and provided on both sides with strip-shaped projections 7 b , which cover the outer surfaces of the carrier 1 and together with the outwardly directed part 7 c of the putty bar 7 at the same time form the cement beds. In this embodiment provides significantly better thermal insulation is obtained due to the over the entire outer surface of the concrete beam 1 extending Kittleiste 7, since the c already by the cover through the glass panes and the putty 5 as well as the here relatively wide outwardly directed part 7 scored thermal insulation This is supported by the additional insulation provided by the strip-shaped extensions 7 b.

Claims (4)

Patent claims: 1. Glazing girders made of concrete, in particular prestressed concrete, provided with a mastic strip for Greenhouses, characterized in that the putty bar (6, 7) is made of heat-insulating, weather-resistant Building material consists, has a foot engaging in the outside of the carrier (1) and through this is firmly connected to the carrier (1). 2. Glazing support according to claim 1, characterized in that the foot of the putty strip (6) in the carrier (1) is set in concrete. 3. Glazing support according to claim 1, characterized in that the foot (7a) of the putty strip (7) dovetail-shaped in cross-section and inserted into a corresponding groove (8) of the Carrier (1) is inserted. 4. Glazing support according to claim 3, characterized in that the putty strip (7) is provided on both sides with strip-shaped projections (7 b) which cover the outer surfaces of the carrier (1) and together with the outwardly directed part (7c) of the putty strip (7) form the cement beds at the same time. Considered publications:
German Patent Nos. 802 094, 805 710;
German patent application ρ 5631 V / 37b D (published June 15, 1950). 1 sheet of drawings © 009 647/31 11.60