Altrad MINI CATCH NET FAN User manual

MINI CATCH NET FAN
USER GUIDE

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Contents
1.0 Introduction .....................................................................................................................................................3
2.0 Key features ...................................................................................................................................................3
3.0 Component Recognition...............................................................................................................................4
4.0 Catalogue........................................................................................................................................................5
5.0 Assembly Instructions.................................................................................................................................7
6.0 Setting the fans in the out of service position .....................................................................................14
7.0 Corner Formation........................................................................................................................................15
8.0 Connection to a facade.............................................................................................................................20
9.0 Technical Details.......................................................................................................................................... 21
10.0 Maintenance, Storage and inspection. ..................................................................................................21

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1.0 Introduction
DESSA offers efcient lightweight temporary roong, encapsulation solutions, aluminium lattice
girders and safety products. DESSA’s unique and distinctive aluminium solutions are suitable for
not only grandstands, stages and events but also public utility works, local authorities, government
buildings, historic buildings, highways, bridges and industrial market sectors. Time proven on
demanding and complex applications across varied climates throughout the UK, Canada, UAE,
Australia and Europe, DESSA offer unrivalled span capabilities and alternative congurations.
From a choice of roong solutions and general purpose lattice girders providing unrivalled cost
to strength ratio, to high capacity lattice girders complete with a dedicated bracing system, we
provide the industry with an ever widening range of cost effective products along with extensive
after sales support to the highest professional standards. At DESSA we develop innovative and
practical solutions for the support, access and weather protection industries. All of our designs are
technically proven and are registered with protected design rights meaning only DESSA can offer
superior solutions through our products. Our senior management team at DESSA offer considerable
experience in the elds of contracting, engineering, manufacture and customer service. Having
introduced a number of class leading products into the UK market and we have worked closely with
a number of key clients in developing bespoke solutions to their problems which we manufacture
on an exclusive basis.
2.0 Key features
• Lightweight
• High Strength
• Lockable for transport
• Fitted without tools
• Adjustable rail location Pre-marked rail for easy assembly
• No loose parts
• Fully Tested
• Adjustable lower claw
• Suits tube Ø48.3

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3.0 Component Recognition
Net Rail
Y09002
Net
Y09003
Support Assembly
Y09001

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4.0 Catalogue
DESCRIPTION PART No WEIGHT (kg) DIM 1 (m) DIM 2 (m)
Support Assembly
Supplied complete with Sliding
lower bracket and adjustable
top bracket with locking pin. For
securing the net to a scaffold or
a facade. Y09001 4.6 2.55 0.43
Net Rail
To support the net at outer and
inner edge. Y09002 3.8 3.00 0.06
Net
100x100mm mesh and 20x20mm overlay for
catching debris and tools. Supplied with integrated
cam buckles.
Y09003 4.2 3.60 2.10
2m Spacer
This optional spacer allows for spacing the support
assemblies 2m apart.
Y09004 3.0 2.08 0.08
0.6m Spacer
This optional spacer allows for spacing the support
assemblies 0.6m apart.
Y09005 1.6 0.68 0.08

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DESCRIPTION PART No WEIGHT (kg) DIM 1 (m) DIM 2 (m)
Wall anchoring bracket
This enables attaching the Mini Catch Net Fan directly
onto a facade.
Y09006 2.10 0.16 0.10
90mm offset shear anchor
Alternative way of xing the Mini Catch Net Fan to a
facade utilizing scaffold tubes.
AB0001 2.00 0.16 0.16
Net Rail connector Bracket
Allows to splice two
net rails enabling the
installation of a corner
fan. Y09007 0.60 0.16 0.13
Corner Fan Support Spur
Ø48,3mm outer diameter support spur with a hinged
connection bracket. Connects to the end
of overhanging net rails and ties back to the
main support assembly to provide support
for the outer edge of a corner fan. Y09008 3.50 3.00 0.20
Quick release pin
AF0002 0.10 82mm Ø12mm

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5.0 Assembly Instructions
5.1 Inspection.
Lay the components out for inspection. Unfurl the net in full. It is essential that the 20x20mm
mesh is uppermost and the cam buckle straps are on the edge closest to the scaffold following
the installation. Check that the service tag is attached and a valid test date is stipulated. Carry
out a visual inspection and report any discrepancies or concerns immediately. Inspect the support
assemblies.
5.2 Installing the supports.
Both the erecting and dismantling of the safety nets have to be executed with the corresponding
PPE.
The free space underneath the safety net of the Mini Catch Fan must be at least 3 metres, nothing,
except the articulated arms must obstruct the path of a potential fall. DESSA recommends the use
of the Mini Catch Fan as close as possible to the work area. A fall, even with the protection of a
safety nets system is never fully free of risks.

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Employing a safe method of work the supports need to be located vertically outside the scaffold
elevation. The uppermost claw needs to be located above the desired connection point and then
push-locked onto the ledger (as shown below).
The locking pin will slide out allowing for the ledger to enter the claw. Do not force the claw over the
ledger - it should not require force when the assembly is perpendicular to the face of the scaffold.
The sliding connector should be attached to the scaffold at the lowest possible location:

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Install the second support assembly.
The distance between the supports should be 2m. This can be achieved using the optional DESSA
spacer Y09004.
2m
optional
spacer

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5.3 Installing the net
With the 20x20mm mesh on the inside connect the outer rail to the upper claws. The claws should
be located centrally between the collars as shown below.
20x20
100x100
Simply put the rail into the claw. Ensure the claw is central between the collars.

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Install the internal rail making sure that the net stays on top of the rail, does not get in the way and
is not clipped in the claw.
Hold the upright and open the fan by reaching under the net ap
and disengaging the claw spring pins on both the supports. Push the
upright out and away from the claw and lower the fan into position
by using the net.

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Complete the installation by attaching the ve cam buckle straps to the scaffold. This should
introduce tension to the net ap allowing you to close the gap between the fan and the scaffold.

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5.4 Installing a row of fans
In order for the fans to function correctly an overlap needs to be ensured between them. This
can be achieved by installing the fans 0.6m apart. To ensure this is done correctly use the DESSA
provided 0.6m spacer (Y09005).
2m
0.6m 0.6m
To ensure overlap the internal claws on the
supports need to be shifted downwards on
every second pair of support assemblies.

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6.0 Setting the fans in the out of service position
6.1 Using spacer with hook Y09004 retract each upper fan rail assembly locking the
uprights into the rear safety claw. Following this lift each remaining fan locking in a
similar manner.
Proceed to lift the remaining, lower fans to complete the entire row:

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7.0 Corner Formation
7.1 Assembling the net extension.
Place the rails with net on a at surface. Make sure that the 20x20mm mesh is the uppermost.
Expose the rails by twisting the net on the outer rail and ipping the net ap next to the inner rail.
Locate four Y09007 brackets as shown below. The ones attached to the ends of the rails will use
AF0002 pins and the ones closer to the middle of the rails will snap on using the claw.
Install the overlapping net by placing the respective rails in the brackets as shown below. If
needed slide the net ropes out of the way. Make sure that the overlapping extension net has the
20x20mm mesh on top.

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Use AF0002 pins in the U-shaped brackets and snap the claws on.
7.2 Connect the support spurs Y09008.
Use the AF0002 quick release pins to connect two support spurs to the ends of net rails of the upper set.

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7.3 Install a pair of supports next to a corner of the scaffold, install spacer Y09004
above the lower hinge as shown below. Using the methods as detailed previously at-
tach the double fan assembly to the support frames.
7.4 Unfold the fan as you would a single one, bearing in mind that the assembly is heavier. The
optional spacer Y09004 with hook can be used to restrain the fan allowing the fan to be low-
ered slowly. Allow the support spurs to hang unrestricted for now.

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7.5 Using the integrated hook on spacer Y09004 reach out and bring the support spurs back
to the outer support assembly.

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7.6 Tie the support spurs back to the outer support assembly using standard scaffold
swivel couplers.

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8.0 Connection to a facade
8.1 Using the dedicated catch fan offset bracket Y09006.
You will need four brackets per fan. Suitable and safe connectors need to be chosen according to
the type of wall you wish to anchor to - see below (net omitted for clarity).
8.2 Using the 88mm offset shear tie AB0001.
To use this bracket you will also need standard scaffold tube to serve as connection points for the
fan support assemblies. The advantage of this method is that you will need less brackets than you
would when using the one depicted above. Again, suitable and safe connectors should be determined
according to the type of wall you wish to anchor to (shown below - net omitted for clarity)