The Preservation and Fixing of Galvanized Corrugated Roofing or Sheeting.
Year: 1893

page_text: Date of Application, 27th Feb., 1893-Accepted, 27th May, 1893
COMPLETE SPECIFICATION.
The Preservation and Fixing of Galvanized Corrugated Roofing or
Sheeting.
WILLIAM THOMPSON Engineer and Contractor Custom House Quay Wexford.
I do hereby declare the nature of my invention for THE PRESERVATION AND
FIXING OF GALVANIZED ROOFING OR SHEETING and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention consists of making lateral stretchers or framing for stiffening or
supporting galvanized roofing composed either wholly or in part of galvanized steel
or iron plates or flanges (on which the roofing rests) of such thickness that an
operator erecting a roof can punch them by hand along with the roof sheeting in
position and so get the bolt or rivet holes into both the stretchers and roof sheeting
accurately superimposed.
The stretchers may be of a simple or of a composite form.
When they are of the simple form they are wholly of thin plates of steel or iron
-preferably galvanized-so as to preserve the roofing-but not necessarily
galvanized as they may be coated with lead or tin or some anti-corrosive mixture-
or they may be of plain or "black" steel or iron with strips of felt or canvas or
other similar material inserted between them and the roof sheeting, but none of
these alternative methods are at the same time as effective and as cheap as the zinc
coating or galvanizing.
The stretchers may be of any convenient hollow or trough section to give them
stiffness having projecting edges or flanges on or against which the galvanized
corrugated sheeting bears and to which it is bolted or rivetted.
When greater stiffness is required a composite formation is adopted, either by
bolting or rivetting a bar of iron or steel of any suitable section to the stretcher in
the simple form-as shewn in Fig. 3 of the accompanying drawing or bars of iron
or steel of any suitable section are used as grounds to the edges of which thin
plates or flanges of galvanized iron or steel are bolted or rivetted and on or against
which and to which the galvanized corrugated sheeting to be affixed is attached.
In the accompanying drawing
Figs. 1. 2. 3. & 4. represent stretchers of the simple form or wholly composed of
thin plates any of these can be made composite by adding or attaching a bar of
iron or steel of any suitable section as in Fig. 3.
Figs. 5. & 6. represent stretchers built up or of the composite form or con-
struction.
Any suitable section of bar iron or steel may be used as a ground for the
galvanized preserving and securing strips or flanges.
A reference to the drawing will make this clear. R. S. represents the galvanized
corrugated sheeting to be affixed-S. the body of the stretcher itself when of the
simple form. F. F. are the flanges or strips of galvanized iron or steel-B. B. B. are
examples of bar iron or steel grounds of the composite form of stretcher.
.
This invention is alike applicable to stretchers for securing galvanized corrugated
sheeting when placed vertically as in the gables of roofs or when it is used for
shelter or wall sheeting.
No claim is made in respect of galvanized strips or other non-corrosive packing
inserted between iron or steel stretchers and galvanized sheeting other than to which
the sheeting is attached as herein described.

page_text: 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 that what I
claim is
For stretchers or framing for galvanized corrugated roof or wall sheeting having
flanges rendered non-corrosive as described, but preferably galvanized, on or
against which flanges the said roofing or wall sheeting bears and to which the said
roofing or wall sheeting is bolted or rivetted. Such flanges being slight enough to
be punched by haud along with the sheeting and during the operation of fixing the
latter.
Dated this 25th day of February 1893.
WILLIAM THOMPSON.