[0001] It has been studied and experimented with tests of load, to have more safety, offering
an alternative to the traditional connections after having conducted a research and
a careful analysis of existing products in commerce.
[0002] The special base in steel (momentarily for lack of industrial production) can be
drawn by beam HEA-HEB-HEM with parallel wide wings cut and shaped considering the
various measures that they satisfy the calculations of resistance to the traction,
bending, twisting moment to establish the safety admissible load adding a hypothetical
permanent and accidental overload.
[0003] To conclude the manufactoring product it needs to perforate the holes in the superior
part of the special base as well visible in the sketch fig.1 and subsequently follows
the treatment of zinc-coated.
[0004] To allow the correct connection it needs to perform some milling in the main beam
and in the secondary beam so is possible insert the special base in the secondary
beam and lean all on the main beam inserting the wooden screw in the special holes
of the superior wings of the special base as in the sketch fig.2.
[0005] Through special template is possible to realize the milling of the beam in wood to
permit the correct insertion of the fitting special base to fit the secondary beam
in correspondence of the special place on the main beam so that result hidden between
them, getting the so-called "disappeared".
[0006] One of the most fundamental characteristic of this special base is to be a hot rolled
element so that has not intenal tensions (es. weldings, folding with possible stretchings,
nervelessness, cranny and incisions provoked by the folding machines).
[0007] Another important point in favor is the overmanned rays of link of the superior wings
and of the inferior wing of the special base.
[0008] The innovation intends to reach important targets: great safety and more quality;
if in the future the innovation had to have a breadth employment it could be proposed
to some great industry or steelworks a production on well precise measures through
heat lamination, or through forging or hot rolled of the pieces.
[0009] Two of the objectives reached with the new special base are to bring great loads
and to guarantee great safety.
[0010] Making tests of load using two specimen special bases inserted in a secondary beam
baseed and screwed in the milling of two primary beam, it has been possible to ascertain
that increasing progressively the load, the derived endurance tests has overcome every
expectation.
[0011] Still under load we have been removed the fixing screw and is been able to verify
that the structure has not accused yielding, because the superior wing of the special
base, on the secondary beam acted in compression, from here the name "Special bases
to disappearance self-supporting ".
[0012] It is necessary use this special base on a square or rectangular section beam, in
lamellar wood BS 11 and BS 14, double-lamellar, in timber and KWH beams.
[0013] The superior wing fig.2(1) of the special base offers a rest on the mean beam like
the inferior wing fig. 2(3) offers a rest in the slot of secondary beam, while the
superior wing fig.2(2) it acts in compression in the milling of the secondary beam
and under load it maintains the special base in line with the beam.
[0014] The special base can be used for the realization of intermediate floor, attics, suspended
ceiling, and for the primary and secondary roof framework of the greatest part of
the wood structures.
[0015] When the main beams are parallel each others and the structure to be realized is
in square with them we have to use the square linear cut special bases as represented
in draw fit.1; otherwise when the beams are not parallel and the structure is not
in square, it could be realized (always from the same "
J"profile),left and right special bases as represented in top view in sketch fig.3,
where the wing superior fig3(1) is equal to the normal special base, while the wings
fig.3(4) and (5) can be realized with inclined cut, so also the inferior wings of
the special base.
1. The product
" Hidden special base self-supporting in hot rolled steel for wooden beams"
has been studied and experimented with tests of load, to have more safety, offering
an alternative to the traditional connections after having conducted a research and
a careful analysis of existing products in commerce.
The innovation bases its essential feature on displacement the anchor from overlapped
to the wooden timber depth.
The superior wing fig.2(1) has the anchor on the top of the mean beam and the inferior
wing fig.2(3)inserted in the milling offers the anchor to the secondary beam, whereas
the superior wing fig.2 (2), acting in compression on the secondary beam does not
allow under load the releasing of the base.
2. The "Hidden special base self-supporting in hot rolled steel for wooden beams"
As claimed in claim 1), an important characteristic contained in the shape of the
base, that displaces the anchor from overlapped to the wooden timber depth, is to
have a "Z"(zed) profile.
Afterwards the special base is composed by the superior wing fig.2(1), the vertical
coast and an inferior wing fig.2(3) as anchor.
Adding the superior wing fig.2(2) that acts in compression, in conclusion we get a
"J"(Jey) profile as showed in the sketch fig. e fig.2
3. The "Hidden special base self-supporting in hot rolled steel for wooden beams"
As claimed in claim 1 and 2, the innovation is characterized by a special base derived by hot working without inside tensions as the welding or the
folding could give it.