concrete or similar cladding. They are usually several

21.4

CW pumphouse

being

provided

The

CW

pumps

on

some

power

stations

are

located

under the control room and switchgear rooms. Due to

trenches,

plinths

and similar arrangements, floors are usually of in-situ

superstructure.

The control room building has finishings of a fairly

high standard in the entrance hall, staircases and the

control room itself. Terrazzo or similar floors are

frequently used in entrance halls and staircases and

rubber or similar noise-absorbent floor finishes in the

control room. Panelling or similar finishes are used on

the walls in these rooms, and suspended ceilings using

cladding.

acoustic

tiles

or

other

removable

panels

arc

used

to

Circular

pumphouses

have

been

constructed

for

conceal

ventilating

ducts and other

services

located

at

hydraulic

reasons

and

because

they

have

certain

high level.

Cable

basements

usually

have

granolithic

structural

advantages

for

the

foundation

design.

They

floors, fair

faced

brick

or

concrete

walls

and concrete

usually

have

a radial crane

for

handling

pump

com­

ceilings.

ponents.

To keep the air free from dust and to maintain a low

To

prevent

mechanical

damage

to

the

walls

at

low

humidity a

forced or balanced

plenum

air

conditioning

level

it

is

usual to

have

a

plinth

of

brick

or

precast

system

is

installed

and doors

are

located

in

such a

manner

that

air

locks

are

provided

to

minimise heat

finished

with

a fair face

internally. The

cladding

is not

loss. The necessity

for

accurate reading

of

instruments

usually

lined

and

large

areas

of

glazing

are

provided.

on the

panels means

that

the

lighting

of

the

control

Ventilation

is

by

manually

controlled

opening

win­

room including

the arrangement

of

windows

requires

dows. Heating is

not normally

provided. Floors

gen­

special treatment. Diffused ceiling lighting usually gives

erally have a granolithic finish.

Should

it

be necessary

to

provide

accommodation

21.3

Special

features

to

be

considered

during

the

design

of

section

required, the

ceiling

being

of

wood

wool

slabs

or similar

insulating

materials. Finishes

are

used

to suit

are

the large

filters

and

ducts

for com­

bustion

air

to

the sets

and

cooling

air

to

and from

the

electrical generators and oil coolers, built onto the

structural

foundations.

Preferably

the

gas

turbine

house should be independent of the main buildings and

located in an area away from offices and similar build­

buildings

ings because of the noise factor. A steel or reinforced

concrete frame is normally used as provision must

be

cr*mande offoraboutanovcrhcad

15

t

capacity. To

give good sound insulation 340 mm or 460 mm brick or

similar construction walls are used together with a

precast or in-situ concrete roof. Natural lighting is best

obtained by the use of high-level windows or preferably

by roof lighting.

houses

is

usually

by means of louvres and as the turbines operate for

comparatively short periods and are not manned, the

louvres can be electrically operated with control ther­

houses

The turbine hall, filter room and other ancillary plant

load

rooms usually have a granolithic floor finish with fair

or

precast

concrete

faced brick walls and concrete ceilings. The control

rooms have plastered walls and ceilings together with

lile

or

similar

floor

finishes.

Heating

of the control room is normally by means of electric .

pumphouses.

283