Steel or Iron Plate or Joist for Supporting Floors, Walls, and the like.
Year: 1890

page_text: Date of Application, 26th Mar., 1890
Complete Specification Left, 27th Dec., 1890-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Steel or Iron Plate or Joist for Supporting Floors, Walls,
and the like.
JOSEPH MAYOH, 31, Brundretts Road, Chorlton-cum-Hardy, Manchester,
Engineer, do hereby declare the nature of this invention to be as follows :—
My invention relates to a new form or section of a steel or iron plate or joist for
supporting floors walls and the like.
It is composed of a bar of steel or iron any required depth and thickness &
corrugated cross sectionally.
The corrugations need not be of any particular pitch, size or shape, but the pitch
is regulated by the depth of the bar or joist.
It is designed to compare with the ordinary H section of steel or iron bars now
largely used for carrying purposes and is found to possess great strength.
Dated this 25th day of March 1890.
JOSEPH MAYOH.
COMPLETE SPECIFICATION.
Steel or Iron Plate or Joist for Supporting Floors, Walls,
and the like.
JOSEPH MAYO, 31, Brundritt Road, Chorlton-cum-Hardy, Manchester,
Engineer, 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 :-
My invention relates to a new form or section of a steel or iron plate or joist
for supporting floors walls and the like.
In place of the ordinary rolled joist H section being used I prefer to use iron
or steel plates or bars corrugated cross sectionally.
The corrugations need not be of any particular pitch, size or shape, but the pitch
must be regulated by the depth of the plate or joist & length required.
The plate or joist can be made any depth & thickness to suit requirements &
for different strengths.
To form a concrete floor for which this invention is specially suited I put the
Corrugated plate or joist a specified distance apart and set up on edge, resting on
walls, girders or other supports at each end. To form a bed or seat on the ends
I put a small piece of thin flat iron or a cast iron shoe, and insert therein the
corrugated joist.
During the construction of a concrete floor 1 should insert or thread through the
joist a round or square iron or steel rod of small dimensions (say "square) to
prevent the joist from falling on one side.
The cement concrete floor would be constructed in the ordinary way.
For supporting walls the joists could be used in the ordinary way & bolted
together.
In order to prevent any misunderstanding
describe the invention on the
Drawing No. 1, & explain the same in the following passages.
Fig. 1. gives a half full size section of the corrugated bar suitable for a floor
6 inches thick, the top finished with one inch thick granite & the bottom or ceiling
floated with thick of plaster. This view also shews the iron rod threaded
through same.
Fig. 2. gives a half full size section of the corrugated bar suitable for a floor
6 inches thick as before but the top boarded and the underside floated as before.

page_text: Fig. 3. gives a plan of a concrete floor with boarded top or surface.
Fig. 4. gives a plan of a concrete floor with a granite top or surface.
Fig. 5. gives a longitudinal section of a floor with a granite surface.
Fig. 6. gives a longitudinal section of a floor with a boarded surface.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare what 1
claim is :
1. The plate or joist being corrugated it is considerably stronger than a straight
plate and it will compare favourably with the ordinary H section iron now so
largely used.
2. The corrugations will prevent the bar from buckling when loaded, & will
act as a key for the concrete to adhere too.
3. The joist having no flanges & being of small dimensions on the edge it
will prevent the concrete ceiling from shewing the lines of joists usually to be
found if the ordinary Hiron is used.
The plaster will also readily float over the edge of the joist referred to and
prevent the iron or steel becoming twisted by heat or fire.
Dated this 24th day of December 1890.
JOSEPH MAYOH.