03-installing assembled racks.doc

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Installation ManualM900/M1800 Base Station Controller

Hardware Installation - Cabinet InstallationChapter 3 Installing Assembled Racks

Chapter 3 Installing Assembled Racks

3.1 Structure of Assembled Rack Connections

The sequence of connections between the assembled rack and various structural

parts is given as follows:

1) Determine whether footings or anchor bolts need to be installed for the

assembled racks taking into account the rack installation site. If the assembled

racks are installed on the antistatic floor, anchor-pressure plate assemblies

should be installed. And then, fix each assembled rack onto the supports. If the

assembled racks are installed on the ground, M16 anchor bolts are installed first.

Then, install the assembled racks onto the ground, as shown in Figure I.1(a) ~

Figure I.5(b).

2) Adjust the assembled racks and make necessary connections at the rack top

and rack bottom, as illustrated in Figure I.6(a) and Figure I.6(b).

3) When the upward cabling is adopted, assembled rack installation requires the

cabling rack. When downward cabling is adopted, assembled rack installation

requires the wiring trough, as illustrated in 3.5.1Figure I.62(a) ~ 3.7.1Figure I.93.

4) The installation of shock-proof girth member for assembled rack is illustrated in3.8.1Figure I.59~3.8.1Figure I.60.

5) The fixing and installation of the assembled racks between rack rows is

illustrated in 3.9.1Figure I.59 (a) and 3.9.1Figure I.59 (b).

6) The installation of assembled rack and the doors is illustrated in Figure 3-60 (a)

~ Figure 3-69 (b).

When the assembled rack installation is completed, conduct the check again to

ensure the installation is secure, correct and reliable.

3.2 Installing Footings or Anchors for Assembled Racks

If the assembled racks are installed on the antistatic floor, footings should be firstly

installed. As a transitional part, the footing connects the cabinet with guide rails of the

supports. If the assembled racks are installed on the cement floor, universal anchor

bolts, i.e., the M16 anchor bolts, are adopted. During the installation, make sure that

the distance between the bottom surface of the anchor bolts and the bottom of the

assembled rack is 55 mm. The installation of the footings and that of the universal

anchor bolts are shown in Figure I.1 (a) ~ Figure I.2 (b).

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(3)

(2)

(4)

(1)

(1) Footing (2) Flat washer 16 (3)Bolt M1635

(4) Spring washer 16

Figure I.1 (a) Installing footings for the assembled rack

(1)

(2)

(3)

(1) Footing (2) Rack (3) Bolt M1635

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Figure I.1 (b) Installation of footings for the assembled rack is completed

(1)

(3)

(2)

(1) Rack (2) Retaining nut M16 (3) M16 anchor bolt

Figure I.59 (a) Installing anchor bolts for the assembled rack

(2)

(1)

(1) Retaining nut (2) M16 anchor bolt

Figure I.2 (b) Installation of anchor bolts for the assembled rack is completed

3.3 Connections between Assembled Rack and Guide Rails

After footings or universal anchor bolts are installed, assembled racks will be installed

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onto the guide rails of the supports or onto the cement floor.

When installing assembled rack onto the support, use M1620 bolt, spring washer

16, flat washer16, M16 square nut to fix the footings of the assembled rack onto

the guide rails, as shown in Figure I.59 (a) and Figure I.3 (b).

1) Uplift the assembled racks onto the guide rails one by one. Align the four fixing

holes of each rack support with the fixing trough of the guide rail. Place in the

M16 square nut from the trough opening of the guide rail, and align it with the

fixing hole of the assembled rack and that of the support. Finally, use M1620

bolt to secure the connection.

2) First secure the connection between the outermost assembled rack and the

guide rail. Adjust the levelness and the verticality. Then, take the first assembled

rack as benchmark, adjust and fix the assembled racks one by one.

(8)

(7)

(4)

(3)

(2)(1)

(6)

(5)

(1) M1220 bolt (2) Spring washer 12 (3) Flat washer 12

(4) Guide rail (5) Support (6) M12 square nut

(7) Footing (8) Rack

Figure I.59 (a) Connecting the rack, guide rail, and fasteners

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(5)

(4)

(3)

(2)

(1)

(1) Rack (2) Footing (3) Guide rail

(4) Support (5) M1220 bolt

Figure I.3 (b) Connections of the rack, guide rail, and fasteners are completed

When installing assembled rack onto the cement floor, place the rack onto the

positions marked for the anchor bolts on the ground after universal anchor bolts have

been installed, as shown in Figure I.60.

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(1)

(2)

(1) M16 retaining nut (2) Nut M16 for adjusting levelness

Figure I.60 Assembled rack installed onto the ground

Starting from the first assembled rack on the left, screw the leveling bolt on the

anchor bolt to adjust the distance from the assembled rack to the ground once a row

of assembled racks are in position, until the racks in a same row are at the same level

and the vertical deviation of the assembled rack against the level surface is no

greater than 3 mm. Adjust each assembled rack from the left to the right, and use the

same method to adjust the second and the third row of the assembled racks. Screw

on the retaining nut M16 on the anchor bolt in order that it is pressed tightly against

the assembled rack. Make sure the connection between the anchor bolt and the

assembled rack is secure and reliable. After connection and fixing between

assembled racks using bolts are completed, press against the M16 anchor bolt with

the pressure plate assembly and use expansion bolt to secure the anchor bolt on the

ground. Place spring washer, flat washer, insulating washer, pressure plate, and

insulating spacer onto the expansion bolt. Press against the anchor bolt with pressure

plate and screw up the nut, the anchor bolt is therefore secured. Follow the same

method to secure all the other anchor bolts as illustrated in Figure I.61 (a) and Figure

I.5 (b). Check the bearing conditions of each anchor bolt. If any individual anchor bolt

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is loose, adjust the footing so that it functions as the bearing part.

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(1)

(7)

(5)

(3)

(2)

(4)

(6)

(1) Nut (2) Spring washer 12 (3) Flat washer 12

(4) Insulating washer (5) Pressure plate (6) Insulating spacer

(7) Expansion bolt M1280

Figure I.61 (a) Fixing the assembled rack onto the ground

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(2)

(1)

(3)

(1) Rack (2) Anchor-pressure plate assembly (3) Anchor bolt

Figure I.5 (b) Fixing of the assembled rack onto the ground is completed

3.4 Connections between Assembled Racks

When all the assembled racks are in position, the racks should be lined up and close

to each other. Connect the assembled racks. Thread the bolts through the connecting

holes (two on top and two at the bottom) on the two sides of each assembled rack,and use flat washer, spring washer and nut to connect two adjacent assembled racks.

M310 bolts are used to connect the top covers with the decorating plates, and the

top decorating plates with the side panels of the adjacent assembled racks.

When using tools, mind that the tools should not scratch the racks.

Connections between the assembled racks are illustrated in Figure I.59(a) and

Figure I.59(b).

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(3)

(4)

(5)

(2)

(6)

(7)

(1)

(3)

(4)

(5)

(3)

(4)

(5)

(1) Rack (2) Bolt M8170 (3) Flat washer 8

(4) Spring washer 8 (5) Nut M8 (6) Bolt M890

(7) Bolt M830

Figure I.59 (a) Connecting two assembled racks on the top and bottom

(2)

(1)

(3)

(1) Bolt M890 (2) Bolt M8170 (3) Bolt M830

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Figure I.6 (b) Connection of two assembled racks on the top and bottom is completed

When connecting assembled rack with original welded rack in the equipment room,

installation supports of some welded racks may stick out of the rack sides, as shown

in Figure I.60. In this case, the assembled rack cannot be kept abreast with it. So a

new P550 end support is required to be installed at the side of the welded rack to

connect the assembled rack. Adjust the height of the end support to align with the

original welded rack at the same height. Next, install a transitional underframe on the

original support and the end support with four bolts 1230, flat washer 12, and

spring washer 12. The height of the transitional underframe is 50 mm. See the

illustration in Figure I.61 and Figure I.62 Then, place the assembled rack without

footing onto the support. Adjust the two types of assembled racks by adding spacers

and align the connecting holes at the sides of the racks. Connecting the two types ofthe assembled racks with bolts, flat washers, spring washers and nuts through the

holes (two connecting holes at the top and two at the bottom), as illustrated in Figure

I.63.

(1)

(2)

(1) Rack (2) Support

Figure I.60 Installing the welded rack and the supports

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(5)

(1)

(1)

(1)

(4)(2)

(3)

(1) Bolt M8 (2) Used to connect with assembled rack (3) Used to connect with the

support

(4) Used for fixing floor bracket (5) Transitional underframe

Figure I.61 Structure of the transitional underframe

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(4)

(2)

(1)

(3)

(1) Welded rack (2) Transitional underframe (3) Original support

(4) End support

Figure I.62 Installing the transitional underframe

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(1)

(3)

(5)

(7)

(6)

(4)

(2)

(1) Welded rack (2) Bolt M8130 (3) Assembled rack

(4) Bolt M8170 (5) End support (6) Bolt M890

(7) Original support

Figure I.63 Connection between the assembled rack and the welded rack is completed

3.5 Installing Wiring Troughs

1) Function of a wiring trough

When a wiring trough is adopted for the downward cabling, power cables are to be

introduced from the top of the assembled rack and wiring trough is required for

carrying these power cables. There are two types of wiring troughs, one is the wiring

trough used for racks in a rack row (hereafter referred to as intra-row wiring trough),

and the other is the wiring trough used between assembled rack rows (hereafter

referred to as inter-row wiring trough).

2) Profile and structure of a wiring trough

Used between the racks inside a rack row are a wiring trough and two baffle rings.

Their outside view and structure are shown in Figure I.59 (a) and Figure I.11 (b).

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(1)

(2)

(3)

(1) Baffle ring (2) Wiring trough (3) Screw M510

Figure I.59 (a) Installation of the wiring trough and the cable baffle rings

(1)

(2)

(3)

(1) Baffle ring (2) Wiring trough (3) Screw M510

Figure I.11 (b) Installation of the wiring trough and the cable baffle rings is completed

The wiring trough used between rack rows is composed of two segments of wiring

troughs and its length can be adjusted according to the spacing between rack rows.

The adjustable length range is 1150 ~1550 mm. Its outlook and structure is shown in

Figure I.60.

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(2)

(1)

(6)

(5)

(4)

(3)

(1) Wiring trough 2 (2) Wiring trough 1 (3) Flat washer 8

(4) Spring washer 8 (5) Bolt M825 (6) Bracket

Figure I.60 Structure of the wiring trough used between rack rows

3) Sizes of mounting holes at the top of an assembled rack

The mounting holes are reserved at the top of the assembled rack for the installation

of the wiring trough and the shockproof support. Their structure and sizes are given in

Figure I.61.

(1)

(3)

(2)

(1) Bolt M8 for connecting

shockproof support

(2) Total: 4 pcs (3) Used with tapping screw M510 for

fixing the wiring trough

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Figure I.61 Mounting holes at the top of an assembled rack

4) Installing the wiring troughs

The intra-row wiring trough is fixed at the top of the assembled rack with screws

M510 as shown in Figure I.62 (a) and Figure I.14 (b) and the inter-row wiring trough

at the assembled rack top with bolts M825 as shown in Figure I.63 (a) and Figure

I.15 (b).

(1)

(2)

(3)

(1) Wiring trough (2) Screw M510 (3) Rack

Figure I.62 (a) Installing wiring troughs for each row of assembled racks

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(1)

(2)

(1) Wiring trough (2) Rack

Figure I.14 (b) Installation of wiring troughs for each row of assembled racks is completed

(4)

(3)

(1)

(2)

(1) Flat washer 8 (2) Spring washer 8 (3) Bolt M825

(4) Wiring trough

Figure I.63 (a) Installing the wiring trough between assembled rack rows

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(1)

(4)

(2)(3)

(1) Wiring trough (2) Flat washer 8 (3) Spring washer 8

(4) Bolt 825

Figure I.15 (b) Installation of the wiring trough between assembled rack rows is completed

5) Installing the protective wiring troughs for the downward cabling

The protective wiring troughs for the downward cabling are fit for the antistatic

equipment room and installed beneath the antistatic floor. They are used for the

rodent-proof purpose for the HW cables, optical fibers and NOD cables in inter-row

wiring. The two sides of a wiring trough should press against the lower cable outlet of

the rack. To fit in with the versatility of engineering installation, the height of the wiring

trough can be adjusted via the movable wiring trough and the applicable height range

of the antistatic floor is 150~ 500 mm. The length can also be adjusted. By adjusting

the wiring trough at the sides, the wiring trough in the middle can be lengthened or

shortened accordingly to meet the requirements when the spacing between two rows

of racks is 1150~1550 mm. Structure of the protective wiring trough is shown in

Figure I.64.

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(3)

(2)

(1)

(4)

(8)

(5)

(6)

(7)

(1) Movable wiring trough (2) Wiring trough (3) Middle wiring trough

(4) Carriage (5) Nut M8 (6) Flat washer 8

(7) Spring washer 8 (8) Expansion bolt M860

Figure I.64 Structure of the protective wiring trough

The three carriages of the wiring trough are optional parts. When the height of the

antistatic floor is less than 355 mm, the carriages are not needed and just use

wooden screw and plastic expansion sleeve to secure the wiring trough on theground, as shown in Figure I.65 (a) and Figure I.17 (b). If the height of antistatic floor

is less than 210 mm, the movable wiring trough is not needed and the wiring trough

can be cut to a length at both sides in accordance with actual needs.

(3)

(2)

(4)

(1)

(1) Movable wiring trough (2) Wood screw M625 (3) Wiring trough

(4) Plastic expansion sleeve

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Figure I.65 (a) Installing the protective wiring trough

(3)

(1)

(2)

(1) Cover plate (2) Screw M3X6 (3) Wiring trough

Figure I.17 (b) Installation of the protective wiring trough is completed

For the rodent-resistant purpose, the protective wiring trough should press against the

lower cable outlet of the cabinet, and the wiring trough and cabinet lower cable outlet

should be arranged reasonably. As illustrated in Figure I.66, change the location of

the wiring trough by modifying the overlap (L) between the wiring trough and the

lower cable outlet of the cabinet. That is, when L in the diagram is given appropriate

value, it can both serve the rodent-resistant purpose and cable outlet requirements.

Adjust the height (h) of the wiring trough, and press it against the cabinet lower cable

outlet. The relation between h (height of the wiring trough) and H (the height of the

antistatic floor) is as follows: h = H + 15 mm. The completed protective trough in the

assembled rack is shown in Figure I.67.

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(1) Cabinet (2) Lower cable outlet of the cabinet (3) Antistatic floor

(4) Support (5) Protective wiring trough

Figure I.66 Position of the protective wiring trough in relation to the cable outlet of the assembled rack

(1)

(1) Protective wiring trough

Figure I.67 Installation of the protective wiring trough onto the assembled rack is completed

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3.6 Through-holes and Installation of Their Covers

There are through-holes for optical fibers at the top and the bottom of the assembled

rack. To prevent rodents, dust and other sundries from entering the cabinet, these

through-holes should be covered with long cover or short cover, as shown in

Figure I.59.

In some cases, power cables are introduced from the bottom of the cabinet. The

upper and lower sides of the cabinet each have six through-holes for introducing the

power cables from the cabinet bottom. The structure of the cable through-holes at the

assembled rack sides is given in Figure I.60.

(2)

(1)

(3)

(4)

(1) Through hole for optic fiber (2) Through hole for subscriber cable

(3) Direction of the effort for the installation (4) Direct ion of the effort for the removal

Figure I.59 Mounting covers for the through holes

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(1)

(2)

(1) Upper through hole (2) Lower through hole

Figure I.60 Through holes at the assembled rack sides

3.7 Installing Cabling Racks

When upward cabling is adopted, cabling racks are needed in the equipment room.

Various types of the cables in the equipment room can be laid on the cabling racks.

Also, the installation of the cabling racks can reinforce the equipment and enhance its

shockproof performance. According to its specific location in the equipment room, the

cabling racks can be installed in four ways. It should be noted that the cabling racks

must be insulated from the ground surface, the roof and the wall.

Install a suspender on the ceiling to hang a cabling rack (hereinafter referred to

as suspension mounting mode).

Install a bracket on the ground to support a cabling rack (hereinafter referred to

as ground-supporting mode).

When the cabling rack passes over the cabinet, install a shock-proof support or a

ladder on the cabinet to support the cabling rack.

When the cabling rack is placed against the wall, a triangular support can be

installed on the wall to support the cabling rack.

A cabling rack is mainly present in form of cabling ladder and wiring trough is optional.

The cabling ladder and the wiring trough have the following specifications:

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200 mm-wide cabling ladder matches 200 mm-wide wiring trough.

400 mm-wide cabling ladder matches 400 mm-wide wiring trough.

600 mm-wide cabling ladder matches the wiring trough whose width is 400+200

mm.

It is recommended that the 400 mm-wide cabling ladder over the cabinet be adopted

and no wiring trough be selected so as to facilitate the wiring and the heat-dissipation

of the system.

1) Data needed for project survey

The equipment buyer or the engineering design body should provide the equipment

room layout plan, which should contain the following information and data specifically.

Cabling ladder specifications and length when adopting suspension mounting

mode or ground-supporting mode.

Note:The cabling ladder installed at the top of the cabinet should be handled in the suspension mounting

mode or ground-supporting mode.

Cabling ladder specifications and length when adopting triangular support

installation mode. Specifications and length of the wiring trough adopted.

Total length of the channel-section steel needed for shockproof reinforcement

when not installing cabling rack in the equipment room.

2) Brief of cabling rack parts

The installation parts of the cabling rack are shown in Figure I.59~Figure I.77.

Figure I.59 A channel-section steel

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Figure I.60 A U-shaped connecting piece

Figure I.61 A cross stay (200 mm)



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Figure I.64 An angle support

Figure I.65 A cable-through rack

Figure I.66 A triangular support (for cabling ladder 200 mm wide)

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Figure I.67 A triangular support (for cabling ladder 400 mm wide)

Figure I.68 A triangular support (for 600 mm-wide cabling ladder)

Figure I.69 A connecting clip for the wiring trough

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Figure I.70 A fixing clip for the wiring trough

Figure I.71 A wiring trough (200 mm wide)

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Figure I.72 A wiring trough (400 mm wide)

Figure I.73 An insulating washer

Figure I.74 An insulating spacer

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Figure I.75 An end cover

Figure I.76 A bolt B (M820)

Figure I.77 A protective cable sheathing

3) Installation procedures of a cabling rack

The installation procedures of a cabling rack are shown in Figure I.78.

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Figure I.78 Installation procedures of a cabling rack

4) Structure and assembling of a cabling ladder

A cabling ladder adopts the channel-section steel and the cross stay as its framework,

in which the channel-section steel acts as the vertical beam of the cabling ladder and

the cross stay functions as the horizontal beam. During the assembly, just use the

fastener to connect the cross stay with the channel-section steel. The spacing

between two cross stays is 250 mm. Since the hole spacing of the channel-section

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steel is 50 mm, one cross stay should be installed every 5 trough holes. When the

assembled cabling ladder is used for the horizontal installation of the cabling rack in

the equipment room, the bolt head of the cabling ladder should face down, so as to

facilitate the installation of the wiring trough since there is no protrusion on the cabling

ladder. The basic structure of the cabling ladder is shown in Figure I.79.

(2)

(1)

(3)

(1) Fastener (2) Channel-section steel (3) Cross stay

Figure I.79 Basic structure of the cabling ladder

When the project requires a long cabling ladder, many segments of cabling ladder

can be joined end to end. The connecting part is the channel-section connecting

piece, as shown in Figure I.80. When the length of the cabling ladder is not the

integral multiple of 2.5 m in the actual installation, cut off the remainder part. Apply the

touch-up painting with the brush at the cross-section to ensure the antirust effect and

make the outlook of the ladder pleasing to eyes.

(1) (2)

(1) Channel-section steel (2) Channel-section connecting piece

Figure I.80 Connection between cabling ladders

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5) Connection and installation of the cabling ladder

Since the cabling ladder is cone-shaped, just insert the smaller end of the wiring

trough to the bigger end of another wiring trough and the connection is completed.

The depth of the insertion is 250 mm.

When the 200 mm-wide or 400 mm-wide wiring trough is used for the engineering,

directly place the wiring trough on the cabling ladder. Then, secure the wiring trough

on the cabling ladder with the wiring trough fixing clip. For each segment of the wiring

trough, four such clips are used and they should be symmetrical at both sides.

Figure I.81 gives the connections between wiring troughs.

(1)

(4)(3)

(2)

(1) Wiring trough (2) Baffle ring (3) Cabling ladder

(4) Fixing clip of the wiring trough

Figure I.81 Connection and installation between wiring troughs (200 mm or 400 mm wide)

When a wiring trough is selected for the 600 mm-wide cabling ladder, it can be joined

with a 200 mm-wide trough and a 400 mm-wide trough. Then, use connecting clip to

join the two wiring troughs of different specifications together. For each segment of

wiring trough, three connecting clips are used. At the same time, secure the wiring

trough on the cabling ladder with the fixing clip. When the wiring trough needs to be

lengthened, the connecting method is the same as the aforementioned. Here, follow

the principle of extending length first and fixing next. The specific connection is as

shown in Figure I.82.

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(2)

(1)

(3)

(4)

(5)

(1) Wiring trough(400 mm) (2) Cabling ladder (600 mm wide) (3) Wiring trough (200 mm)

(4) Connecting clip of the wiring trough (5) Fixing clip of the wiring trough

Figure I.82 Composition of the 600 mm wide wiring trough

6) Curving of the cabling rack

The cabling rack curves on a level surface

When the cabling rack needs to be curved perpendicularly in a same level surface,

there are two different installation modes regarding whether the wiring trough is

adopted for the cabling rack.

Case 1: Wiring trough is not adopted for the cabling rack

When the crossing cabling racks consist of only cabling ladders, two cabling ladders

can be joined by angle supports and fasteners. Make sure that the two cabling

ladders are in the same level surface. Figure I.83 shows the installation.

(1) Angle support

Figure I.83 Cabling ladders curve on a level surface

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Case 2: Wiring trough is adopted for the cabling rack

When either of the crossed cabling racks is equipped with wiring trough (or both are

equipped with cabling racks), there should be a height difference of a wiring troughbetween the two cabling racks, that is, the height of the wiring trough for one of the

cabling racks should be in the same level with the ladder of another, so as to ensure

that the cable would encounter no trouble when curving on the cabling rack. The

installation is shown in Figure I.84. Angle supports and fasteners are also used here

for the connection, whereas the installation method of the angle support is slightly

different from that in Figure I.83.

(1)

(1) Angle support

Figure I.84 The cabling rack with wiring trough curves on the level surface

Overlapping of the cabling racks

When the cabling ladder needs to go up or down, one small segment of cabling

ladder can be made into a climbing ladder. Angle supports and fasteners are used for

the connection. Figure I.85 shows the perpendicular jointing of the cabling ladder, in

which the left figure is the illustration of the jointing at the front and the right figure is

the jointing at the sides. Pay attention to the installation method of the angle support.

Figure I.86 shows the side jointing of the cabling ladder.

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(1)

(6)

(2)

(3)

(4)(5)

(1) Protective cable sheathing (2) Wiring trough (3) Cabling ladder(4) Angle support (5) Angle support (6) End cover

Figure I.85 Perpendicular jointing of cabling ladders

(1)

(1)

(1) Angle support

Figure I.86 Diagonal jointing of cabling ladders

Connecting the cabling ladder onto the wall

When the cabling ladder has to be attached to the wall, the installation mode is shown

in Figure I.87. The connecting parts consist of angle support, insulating spacer,

insulating washer, fastener and expansion bolts. The purpose of using insulating

spacer and insulating washer is to insulate the cabling rack from the wall. Meanwhile,

the big flat washer8 is used to replace the washer attached to the expansion bolt so

as to increase the contact area of the washer and the insulating washer.

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(3)

(2) (4) (5)

(1)

(6)

(7)

(8)

(1) Expansion bolt (2) Insulating spacer (3) Insulating washer

(4) Large flat washer (5) Spring washer (6) Nut

(7) Channel-section steel (8) Angle support

Figure I.87 Connection between the cabling rack and the wall

7) Suspension mounting or ground-supporting installation

When the cabling rack is not to place against the wall, the suspension or ground-

supporting installation mode can be adopted. The difference between the two

installation modes is that, for the former installation mode, the cabling rack is

connected to the ceiling and for the later case, the cabling rack is connected to the

ground. The parts used for the connection include channel-section steels, angle

supports, fasteners and expansion bolts. Two pieces of channel-section steel are

used to connect the cabling ladder onto the wall or the ground. The installation

methods are the same as that of mounting the cabling rack onto the wall. Each piece

of channel-section steel is 2.5 meters long. In accordance with the height of the

cabling rack and that of the equipment room, the steel can be cut to suitable length.

When the required length is longer than 2.5 meters, two pieces of channel-section

steel can be jointed to meet the ends. The connecting method is the same as that of

cabling ladder connection. The channel-section connecting piece is used for the

connection and touch-up paints should be applied at the cross section.

Since the hole spacing of the channel-section steel is 50 mm, the spacing of the

suspension links or the supporting links should be the integral multiple of 50 mm.

Otherwise, it is impossible to proceed with the installation. It is recommended that the

spacing of the two sets of suspending links or supporting links be 1250 mm, i.e., each

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segment of the cabling ladder be borne by two sets of suspending links or supporting

links.

When the suspension installation or ground-supporting installation mode is adopted,

the suspending links or the supporting links have to be installed at the outer side of

the cabling ladder to facilitate the placement of wiring trough. At the same time, the

insulation between the suspension/ground-supporting parts and the ceiling/ground

should also be considered. Make sure to add insulating spacer and insulating washer,

as shown in Figure I.88.

(1)

(6)

(2)

(3)

(4)

(5)

(1) Angle support (2) Channel-section steel (3) Washer 8

(4) Insulating washer (5) Insulating spacer (6) Expansion bolt

Figure I.88 Suspension mounting mode or ground-supporting installation mode

8) Installation method of the triangular support

When the cabling rack is placed against the wall, triangular support is used.

The triangular support adopts welded structure, and it is fixed onto the wall by means

of expansion bolts. On its horizontal beam, there are some holes for installing cabling

ladder. The triangular support has three specifications, corresponding to the 200 mm,

400 mm, and 600 mm wide cabling ladder installation respectively (triangularsupports with larger specifications can be used to support cabling ladders of smaller

specifications, but it is not recommended here). Their installation sizes on the wall are

the same.

When installing the cabling ladder, directly place it on the horizontal beam of the

triangular support. Align the holes in the lower side of the channel-section with the

mounting holes in the beams of the triangular support, it is recommended that the

spacing of the triangular supports be 1250 mm, i.e., each cable ladder should be

supported by 2 triangular supports.

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When installing triangular supports, expansion screws are needed to fix the supports

onto the wall, and the big flat washer 8 is required to replace the flat washer

attached to the expansion bolt. Meanwhile, two insulating spacers must be installed

between the vertical beam of the triangular support and the wall, and an insulating

washer must be installed between the nut and the vertical beam. Be sure that each

nut is outfitted with an insulating washer and no omission of it is allowed here. The

installation method of the triangular support is shown in Figure I.89.

(6)

(4)

(5)

(3)

(1)

(2)

(1) Cabling ladder (2) Horizontal beam of the triangular support (3) Triangular support

(4) Vertical beam of the triangular

support

(5) Expansion bolt (6) Insulating spacer

Figure I.89 The method of installing a triangular support

9) Connections on the cabinet top

When the cabling rack (to improve the radiation of the system, usually, wiring trough

is not adopted for the cabling rack on the cabinet-top) passes the cabinet top, the

cabinet-top connection mode is adopted. Connection of shock-proof support on top of the cabinet

The cabinet-top shockproof support is welded from angle iron and it can meet the

strength requirements. Use two nuts on the cabinet top to secure the shockproof

support. The top board of the support is used for bearing and fixing the cabling rack

(to improve the radiation of the system, usually wiring trough is not adopted for the

cabling rack on top of the cabinet). There are bolt holes on the top board. Use

fasteners to secure the cabling ladder with the shockproof support. See the

connecting method in Figure I.90 and. Figure I.91.

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(1)

(5)

(4)

(3)

(2)

(1) Shockproof support (2) Rack (3) Spring washer 8

(4) Flat washer 8 (5) Bolt M825

Figure I.90 Installing shockproof supports for the assembled racks

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(1)

(3)

(2)

(1) Cabling ladder (2) Rack (3) Shockproof support

Figure I.91 Installation of the cabling rack at the cabinet-top when shockproof support is mounted

Connection of the climbing ladder

When there is no support at the cabinet-top, ladder connection method can be

adopted based on the size of the interface on the cabinet top. For the specific

connecting method of the ladder, refer to Figure I.85 (the right one) orFigure I.86.

10) Installing accessories

Installing the cable-through rack

The installation of the cable-through rack can be divided into two cases: When wiring

trough is adopted and when wiring trough is not adopted. Figure I.92 illustrates the

case when wiring trough is not adopted for the cabling rack. Here, the holes at the

upper row are used for installing the cable-through rack. When wiring trough is

adopted for the cabling rack, the holes at the lower row are used to ensure the upper

plane of the cabling rack stays about the same level with the uppermost plane of the

cabling rack. It also facilitates cable laying. Generally, the cable-through rack is

installed on the cabling ladder at the cabinet top. Its quantity and location depend on

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actual conditions of the installation site.

(1)

(2)

(3)

(1) Cable-through rack (2) Hole in the lower row of the cable-

through rack

(3) Hole in the upper row of the

cable-through rack

Figure I.92 Installation of the cable-through rack when wiring trough is not used

Installing end covers, baffle rings and protective cable sheathings

Baffle rings are directly snapped in at both sides of the wiring trough. By adding the

baffle rings, the edge of the wiring trough is heightened to prevent the cables from

transcending the wiring trough. Figure I.81 shows their installation positions. Four

such rings are used for each segment of wiring trough and they spread evenly at both

sides.

End covers are installed at the ends of the cabling ladder. Wherever possible, end

covers should be installed. The purpose of installing end covers is for a better outer

appearance and for the prevention of unintended damage to the cables.

Protective cable sheathings are installed at the bottom edge. The purpose of installing

them is to avoid any possible damage to the cables. Any naked bottom edge of the

wiring trough should be installed with protective cable sheathing. The installation of

end cover and protective cable sheathing is shown in Figure I.85 (the figure on the

left).

Shockproof reinforcement when cabling rack is installed

As shown in Figure I.93, the cabling racks have formed a network and are connected

with the cabinet into a whole. The shockproof performance of these cabling racks is

rather good. Therefore, when considering the shockproof reinforcement measures for

the cabinet, just connect the cabling rack to the wall with the channel-section steel

where it is necessary to enhance the shockproof performance of the whole network,

including the cabinet. It is recommended to install a piece of channel-section steel

every other cabinet. The connecting method to the wall is the same as that of the

suspension or ground-supporting installation. Angle support is also used here.

Insulation should be taken into consideration as well. Ensure good insulation between

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the whole network and the wall by adding insulating spacers and insulating washers.

Figure I.93 Cabling rack installation and shockproof reinforcement

3.8 Shockproof Reinforcement of Assembled Racks

For a single row of cabinets, use bolts, nuts, shockproof supports and channel-

section steels to secure the assembled rack onto the wall or the ceiling to realize theshockproof reinforcement of the assembled rack.

When the cabinet is far away from the wall or drilling on the wall is not allowed,

suspension installation mode can be adopted. Secure the assembled rack onto the

rooftop, as shown in Figure I.59.

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(5)

(4)

(3)(2)

(1)

(6)

(7)

(1) Nut M8 (2) Flat washer 8 (3) Spring washer 8

(4) Bolt M825 (5) Shockproof support (6) Angle support

(7) Rack

Figure I.59 Fixing and installing the assembled rack onto the rooftop

When the cabinet is close to the wall and drilling on the ceiling is not allowed,

connecting the rack to the wall is recommended, as shown in Figure I.60. These are

two typical installation modes for the shockproof reinforcement of single-rowed

cabinets. The two modes can be used together and in practice, proper installation

mode can be selected flexibly according to specific on-site conditions. Insulation from

the rooftop and the wall must be considered during the installation. It is suggested

that one piece of channel-section steel be installed every other cabinet.

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For the shockproof reinforcement of multi-rowed cabinets, refer to descriptions to

follow up below.

(2)

(3)

(1)

(1) Rack (2) Bolt M825 (3) Shockproof support

Figure I.60 Securing the assembled cabinet onto the wall

3.9 Securing the Assembled Racks between Adjacent Rows

Use bolts, nuts, shockproof supports and channel-section steels to connect the

assembled racks between adjacent rows, so that all the assembled racks in the

equipment room are connected into a whole body. In this way, the shockproof

performance of each assembled rack is greatly enhanced.

The installation of the assembled racks and shockproof supports is shown in

3.7.1Figure I.90. The connection of assembled racks between adjacent rows is

illustrated in Figure I.59(a) and Figure I.59(b).

Generally speaking, a vertical connecting piece made of channel-section steel is

installed between two rows every three assembled racks. After various connections

for the assembled racks are completed correctly, secure all the joints and connecting

parts. In special cases, please refer to the reinforcement methods of single-rowed

cabinets and consolidate the connections between the cabinets and the wall or the

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roof according to actual conditions of the equipment room.

(5)

(4)

(3)(2)

(1)

(1) Spring washer 8 (2) Flat washer 8 (3) Bolt M825(4) Nut M8 (5) Channel-section steel

Figure I.59 (a) Connecting the assembled cabinets between adjacent rows

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(4)(3)

(2)

(1)

(1) Flat washer 8 (2) Spring washer 8 (3) Bolt M525

(4) Channel-section steel

Figure I.59 (b) Connection of the assembled cabinets between rows is completed

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