FIELD OF INVENTION
The present invention relates generally to storage sheds of heavy industry,
more particularly the invention relates to a segmental ,manually movable
storage shed for storage and retrieval of alloy steel raw material for making'
water walls' of Boiler in Thermal power plants.
BACKGROUND OF THE INVENTION
Boiler is one component of a thermal power station where pulverized coal
and hot air is ignited and burned to produce heat which heats the water in
the "water walls" which encloses the burning area where the water in the
"water wall" is converted to steam.
The steam thus heated under pressure is used to run "steam turbines"
which produces electricity.
The water walls are normally made up of seamless steel tubes and flats of
steel welded together.
The flats welded to the tubes are of alloy steel material. This alloy steel
flats, in coil form, along with its wooden packing, is stored in storage sheds
to prevent the steel flats from getting rusted due to moisture absorption.

The present invention seeks to eliminate need for a 'permanent storage
shed which normally requires at least one electrically operated overhead
travelling (EOT) crane to handle the heavy alloy steel flats coils.
Japan Patent JP08113986A provides a movable shed having improved
safety, constituting a plurality of tracks 5, 6, 7 having different gauges each
of which comprises a pair of left and right rails 2, 3, 4 laid in rows so that
rails of broad gauge are located outside rails of narrow gauge, and mobile
sheds 8, 9 are movably provided on the tracks 5, 6, respectively so that the
shed 9 can be moved into the shed. Each of the tracks 5, 6, 7 is supported
by a frame 1 having a height larger than that of a human body and grooves
16 extending along the rails 2, 3, 4 are formed on the frame 1 and trolley
wires 17 for feeding power to moving devices of the sheds 8, 9 are laid in
the grooves 16. Workers working on the floor in a building or on the floor in
a building or on the outside ground are prevented from being run over by
the moving sheds 8, 9 and prevented from contacting the wires 17 from
being struck by electricity.
OBJECTS OF THE INVENTION
It is therefore an object of the invention to propose a segmental movable
storage shed for the storage and retrieval of alloy steel flat coils without
using electrical power.
Another object of the invention is to propose a segmental, movable storage
shed for the storage and retrieval of alloy steel flat coils which is constructed
in plurality of smaller segments.

A further object of the invention is to propose a segmental, movable storage
shed, for the storage and retrieval of alloy steel flat coils, in which the
segments of the storage shed, is having stainless steel wheels.
A still further object of the invention is to propose a segmental, movable
storage shed, for the storage and retrieval of alloy steel flat coils, in which
two rails of mild steel "Bright Bars" are used for movement of the segments.
Yet another object of the invention is to propose a segmental, movable
storage shed, for the storage and retrieval of alloy steel flat coils, in which
two continuous raft foundations are built with embedded steel beams over
which the rails are welded.
Another object of the invention is to propose a segmental, movable storage
shed for the storage and retrieval of alloy steel flat coils wherein open web'
steel structure is formed for framing of the segments.
Yet further object of the invention is to propose a segmental, movable
storage shed for the storage and retrieval of alloy steel flat coils in which
Aluminum Zinc alloy coated steel sheets are provided for covering the
segments.
A still another object of the invention is to propose a segmental, movable
storage shed for the storage and retrieval of alloy steel flat coils in which
locking arrangement for the segments is included to the continuous raft
foundations.

SUMMARY OF THE INVENTION
Accordingly there is provided a segmental, manually movable, storage shed
for the storage and retrieval of alloy steel flat coils which does not need a
fixed electrically operated overhead travelling crane for the handling of steel
flat coils, as in prior art configuration, rather mobile cranes are used for the
handling, which is cheaper.
The foundations and the rails of movable shed are provided sufficiently
longer than the total length of the multiplicity of segments. This extra length
provides for the loading and unloading of the coils after moving the
segments to create 'open to sky' space over the loading and unloading area
within the two rails
The segmental movable storage shed is light in weight since the height of
the movable shed is only about 3 metersfmaximum permitted storage height
of the alloy steel flat coils is 2.5m), and also overhead cranes are not
necessary.
The segmental movable storage shed is light in weight since light weight
open web structure framing is used and because of light weight Aluminum
Zinc alloy coated steel sheet is used for roof and side covering.

The light weight of the structure along with its covering enables the
segments of the shed to be moved over the mild steel 'bright bar7 rails easily
using manual force.
Because of the light weight and low height, the cost of the proposed system
gets drastically reduced over 'permanent' storage sheds.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 shows the sectional elevation and plan view of the segmental
movable storage shed for the storage and retrieval of Alloy steel flat coils
used in making of boiler 'water walls' of Thermal power plants.
Figure 2 shows a segmental movable shed.
DETAILED DESCRIPTION OF THE INVENTION
The movable segment of shed (1) is made up of open web steel structural
framing (2) to reduce the weight of the movable segment of the shed.
The open web steel structural framing and purlins (3) is made up of 350
MPa high Tensile steel tubes to reduce the weight of movable segment of
the shed.

The movable segment of the shed (1) is covered with 0.5mm thick
Aluminum Zinc Alloy coated High Tensile 550 MPa steel sheets (4) to reduce
weight as well as long life for the covering.
Bracings made up of 'steel wire rope '(5) is used instead of tubes in the form
of 'X' which gives rigidity to the movable segment of the shed as well as
reduces the weight.
The tubular purlins (4) are proposed at closer spacing than normal (1.2 to
1.4 meter) to give the structure rigidity and also to take care of the
additional wind force when the segmental sheds are in the open.
Four numbers of stainless steel wheels per movable segment is proposed to
eliminate corrosion of the wheels in outdoor exposure (6). Mild steel 'Bright
bar' (7) square rods are proposed as rails at the bottom of both the columns
of the movable segment of the shed to reduce rusting as well to reduce
friction and to maintain straightness.
A steel beam (8) is proposed at the foundation top level, embedded in
concrete, to connect the foundation and the rail (6) by welding.
The two high tensile pipe open web frames are interconnected by open web
strut members (9) to give rigidity to the movable segment of the shed
To arrest water leakage during rains, when the segments of the sheds are
stacked against each other, through the gap between the stacked segments,
a rain water gutter arrangement (10) is proposed.

A continuous, shallow raft foundation (11) is proposed to take care of the
'dead' and wind loads and also to reduce the 'bearing pressure'. The
shallow raft foundation at ground level acts as a flooring also.
A locking arrangement (12) is proposed for the movable segment of the
shed so that the segmental shed can be locked at pre-determined locations,
which is also capable of transferring the wind uplift loads from the shed to
the foundation.
The continuous foundation (11) and the rails are provided on both sides of
the segmental movable shed on which the shed is moved using "manual
force'.
The continuous foundation and the embedded square bar rails (7) are laid
longer than the total length of the segments stacked together.
The extended area (13) of the foundation and rails beyond the stacked
segmental sheds is used 'first' as the loading area. After loading of the steel
flat coils, the extended area is closed, by moving the stacked movable
segments to the extended area. During the process of closing the extended
area (13) another 'open to sky' area is generated for subsequent loading.
When the steel flat coils which are loaded and closed, is to be removed, the
segments are moved to the 'open to sky' area and the steel flat coils are
removed using mobile cranes. Hence handling of the steel flat coils using
EOT cranes is avoided as per the prior art method.
The segmental movable shed are not designed with EOT crane, the height
of the movable shed becomes lower and hence the weight of the movable
shed is lighter.

The height of the movable segment is kept around 3m just giving enough
space for the maximum permissible stacking height of 2.5m for alloy steel
flat coils.
Because of the reduced height of the segmental movable shed the wind
loads on the segmental movable shed (1) is lower and hence the weight of
the segmental movable shed becomes lighter.
Also since E.O.T. is not used for handling of the alloy steel flat coils, the
columns (14) of the segmental movable shed are not designed for crane
loads and hence weight of the structure becomes lighter.
The foundation (11) of the system is also not designed for the EOT crane
loads, the foundation becomes lighter.
Because of the above mentioned reasons the weight of the structure
becomes very light as well as the cost of the segmental movable shed, for
the storage and retrieval of alloy steel flat coils becomes very much cheaper
than 'permanent 'storage sheds with E.O.T Cranes.

WE CLAIM:
1 A segmental, manually movable storage shed for the storage of
alloy steel flat coils used for the making of 'water walls' in Boiler in
a thermal power plant comprising:
steel frames (1) which span across the distance between at least
two rails (7) which is covered with metallic sheets (4) over purlins
(3), which moves on wheels, (6) with a continuous foundation
(11) and a locking arrangement (12).
2 The movable segmental storage shed as claimed in claim 1
wherein the steel frame (1) as well as the purlins (3) are formed
of 350 MPa high tensile alloy steel tube to make the steel framing
light weighted.
3 The movable segmental as claimed in claim 1, wherein the
metallic sheets (4) used for covering the segmental shed (1) is
made up of 0.5 mm thick 550 MPa high tensile steel coated with

Aluminum Zinc alloy and wherein the metallic sheets are pre
painted,
4 The movable segmental storage shed as claimed in claim 1,
wherein the stainless steel wheels (6) is provided with double ball
'bearing' for easy movement of the movable shed.
5 The movable segmental storage shed as claimed in claim 1,
wherein said at least two rails (7) are made of 'Mild Steel Bright
Bar* square rods to have better corrosion resistance and
straightness.
6 The movable segmental storage shed as claimed in claim l,
wherein said locking arrangement (12) consisting of steel rods and
350 MPa High Tensile steel tubes and bolts.
7 The movable segmental storage shed as claimed in claim 1,
wherein said raft foundation (11) is a Mz5 grade reinforced
cement concrete shallow raft which run along the bottom of said
two rails.
8. The movable segmental storage shed as claimed in claim 1,
wherein a steel beam is provided at top level of reinforced
concrete, which steel beam is embedded in concrete over which
the rail is connected by welding.

9 The movable segmental storage shed as claimed in claim 1,
comprising a framing (2) made of high tensile steel tubes and wire
ropes (5) for bracings.