Improvements in Fire-proof Floors, Roofs, Girders, Joists, and the like.
Year: 1891

page_text: Date of Application, 28th Nov., 1891
Complete Specification Lelt, 23rd July, 1892-Accepted, 27th Aug.,
-1892
Improvements in Fire-proof Floors, Roofs, Girders, Joists, and
the like.
I, JOHN HOLMES BLAKESLEY, of 39 Victoria Street, in the City of West-
minster, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in fire-proof floors, roofs, girders; joists
and the like.
The fire-proofing material is divided horizontally into segments resting on skew-
backs with one or more steps, the said skew-backs being supported by the flanges
of the girders or joists, by which means the fire proofing can be put up after the
main stucture is erected, to carry the superincumbent weight.
My invention is constructed with suitable skew-backs grooved to receive the
flanges of the girders or joists, the same running parallel to and covering the afore-
said girders or joists. Between the skew-backs resting on the upper step I drop
into place for fixing the blocks slightly arched or straight, and at the base of the
said skew-backs I attach a flat tile, whose office is simply to support the plaster
ceiling underneath, and also to keep a large air space between the tiles and the
blocks, by which great lightness and great powers of ventilation are secured. The
blocks acts either as girders or arches.
The blocks and skew-backs, may be either solid or hollow, keyed or unkeyed,
and of any convenient formation.
The fire-proof casing in all parts is made of fire-clay, terra cotta, or any other
suitable fire-proof material, and the spaces are, where required, filled or levelled
with concrete in the usual way, or can be covered with asphalt or any other
material as desired.
It will be understood that the foregoing is given by way of illustration and that
the shapes, materials and parts may be varied in many ways within the scope of my
invention.
Dated this 28th day of November 1891.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.
COMPLETE
SPECIFICATION.
Improvements in Fire-proof Floors, Roofs, Girders, Joists, and
the like.
I, JOHN HOLMES BLAKESLEY, of 39, Victoria Street, in the City of West-
minster, Civil 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 improvements in fire-proofing floors, roofs, girders, joists,
pillars, staunchions or any part of the metallic materials usually used in the erection
of public or private buildings.
The fire-proofing material is divided horizontally into segments resting on skew-
backs with one or more steps, the said skew-backs being supported by the flanges
of the girders or joists, by which means the fire-proofing can be put up after the
main structure is erected, to carry the superincumbent weight.

page_text: '
TIL one accompanying
which-
Fig. 1, is a transverse section of the blocks tiles and skew-backs fitted to
girders.
Fig. 2, is a transverse section of a combination of the blocks and tiles, with
skew-backs fitted to girders.
Fig. 3, is a section on line A B.
°
Fig. 4, is a transverse section of the blocks tiles and skew-backs fitted to
girders.
Fig. 5, is a longitudinal section of Figs. 1, and 2, with the vertical section of
staunchion attached to girders.
Fig. 6, is a section of the tile on line C D.
Fig. 7, is a plan of the staunchion with fire-proofing.
Fig. 8, is a half span of a block tile skew-back and girder in transverse section.
Fig. 9, is a transverse section of a flat tile fitted to a skew-back.
Fig. 10. is a section on line E F.
Various parts of the figs. are broken off for want of space.
Like letters refer to like parts throughout the views..
The fire-proofing material a, e, b, hand i, n or o, is divided into segments
resting on skew-backs with one or more steps, the said skew-backs c being
supported by the flanges of the girders or joists d, by which means the fire-proofing
can be put up after the main structure is erected to carry the superincumbent
weight.
h
My invention is constructed with suitable skew-backs c grooved to receive the
flanges of the girders or joists d, the same running parallel to and covering
the aforesaid girders or joists d, with the division filled in with a block. Between
the skew-backs e resting on the upper portion I drop into place for fixing the
blocks a, or n, slightly arched, or straight as o in Figs. 9, and 10, (the skew-back
being provided with a step), and at the base of the said skew-backs c I attach a flat
tile e or with grooves, whose office is simply to support the plaster ceiling
underneath, and also to keep a large air space between the tiles e ori and the
blocks a, horn, by which great lightness and great powers of ventilation are
secured. The blocks acts either as girders or arches. Any design of perforation
may be used in either the blocks, tiles or skew-backs.
C
The blocks and h, tiles e, i and o, and skew-backs c, may be either solid or
hollow, keyed or unkeyed, and of any convenient formation.
If preferable the block and tile may be constructed in one as in Fig. 2, with
grooves on the under surface to support the plaster ceiling.
The fire-proof casing in all parts is made of fire-clay, terra-cotta, or any other
suitable fire-proof material, and the spaces are where required, filled or levelled
with concrete in the usual way indicated by long dotted lines in Fig. 5, or can be
covered with asphalt or any other material as desired.
The fire-proofing material or k for pillars or staunchions is divided vertically
as well as horizontally into segments keyed together or bedded transversely or
longitudinally with keys or beds of metal m, cement, or other suitable material,
by which means the fire-proofing can be put up after the main structure is
erected.
It will be understood that the foregoing is given by way of illustration and that
the shapes, perforations, materials and parts may be varied in many ways within
the scope of my invention.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is
1. In fire-proofing, the combination of the perforated blocks a hand n, tiles e and i
with the skew-backs e block or key / constructed of fire-clay or of any other fire-
proof material to render floors, roofs, girders and joists fire-proof, substantially

page_text: as herein described and according to Figs. 1, 3, 4, 5, 6, and 8, in the accompanying
drawing.
2. In fire-proofing, the combination of the perforated block and tile b with
grooves g skew-backs block constructed of fire-clay or of any other fire-proof
material to render floors, roofs, girders and joists fire-proof, substantially as herein
described and according to Figs. 2, and 5, in the accompanying drawing,
3. In fire-proofing, the combination of the blocks j and of fire-clay or any
other fire-proof material with keys m, to render girders, pillars and staunchious
fire-proof, substantially as herein described and according to Figs. 5, and 7, of the
accompanying drawing.
4. In fire-proofing, the combination of a flat tile e, i, or o, with the skew-backs c
blocks, of fire-clay or of any other fire-proof material to render floors, roofs,
girders and joists fire-proof, substantially as herein described and according to
Figs. 3, 6, 9, and 10, in the accompanying drawing.
Dated this 22nd day of July 1899
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.