Year: 1899

page_text: Date of Application, 5th June, 1899-Accepted, 22nd July, 1899
I, CARL PÖTSCH, Mason, of Bachstrasse, 16-20, Minden (Westphalia) in the
Empire of Germany, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement; -
The present invention relates to joists, girders or supports for floors and ceilings
the construction of which is both cheap and simple. The girders are made of
ordinary metal say black sheet iron, and are formed of a triangular section the
inclined sides serving as abutments for the transverse supports or blocks. In
order to make these girders available as main supports, and not only as inter-
mediate supports of small dimensions between T girders, they are provided in
the interior with tension rods and connections to secure the ends of the, rods thus
forming a ceiling and floor support answering in a superior degree all require-
ments as regards fire proof quality and carrying capacity.
In the accompanying drawing:-
-
Figures 1 and 2 represent cross sections of two forms of the invention,
Figures 3 and 4 slow longitudinal sections of the forms shown in Figures 2
and 1 respectively.
Figure 5 is a cross section of a ceiling constructed on these supports.
The construction is very simple. The black iron plates are cut so as to corre-
spond with the length and height of the supports desired. They are then bent or
folded as shown at i in Figures 1 and 2 and provided with strengthening devices,
to be explained hereinafter, filled with cement 7 and left to dry and consolidate
for say from 3 to 6 days, after which they are ready for use. The blocks k,
Figure 5, are placed directly between the supports and secured with cement m,
thus avoiding the expensive and tedious erection and removal of supporting
frames, the resulting ceiling, floors, being in the end cheaper than the usual
wooden beam floors, although the new construction produces a stronger and
better ceiling-floor. The strengthening device is constructed in the following
manner. In the centre of the support where the greatest resistance is required,
a firm frame T piece, or triangle or equivalent is placed, as shown by way of
example at ab and c, Figures 2 and 3. Through the vertical part a a tension
bar e is passed, the ends of which are screw-threaded so that they can be stretched
by means of nuts applied against the plates h closing the ends of the supports.
Owing to this arrangement a considerable part of the weight is taken up and
transmitted to the ends of the carriers.
To meet the requirements in a case where the floor is exposed either to great
weight or is of considerable span, a simple support or T piece a, b, Figures 1 and 4
may be arranged to receive several tensions rods ef gh. It should also be borne
in mind, that the cement used for filling in these girders and otherwise employed
in connecting with them must be free from lime which greatly induces rust in
tha iwan nout

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is-
1. A girder, joist or like support made of sheet metal bent to a triangular cross
section and filled with cement and provided with tension rods such as e in the
interior substantially as described.
A girder, joist or like support constructed substantially as described or illus-
trated in Figures 1 and 4 or in Figures 2 and 3 of the accompanying drawings.
Dated this 5th day of June 1899.
BOULT & WADE,
Agents for the Applicant.