Base and Vibration Isolators-cont.

Equipment Location

On Grade

6 m (20 ft.)

9 m (30 ft.)

Floor Span

Equipment

Base

Isol

Min.

Base

Isol

Min.

Base

Isol

Min

Type

Defl

Type

Defl

Type

Dfl

20 kW t 75 kW

I

N

7.6

I

N

43

I

S

63

Over 75 kW

I

N

7.6

I

N

63

I

S

89

EQUIPMENT LOCATION

12 m (40 ft.)

15 m (50 ft.)

Floor Span

EQUIPMENT

Base

Isol

Min.

Base

Isol

Min.

Type

Defl

Type

Defl

COMPRESSORS and VACUUM PUMPS

Up to 1200 W

--

D,L,W

--

D,L,W

--

Over 1200 W

500-750 RPM

--

S

63

--

S

89

Over 750 RPM

--

S

63

--

S

89

PUMPS

Closed Coupled

Up to 1200 W

--

D,L,W

--

D,L,W

--

Over 1200 W

I

S

43

I

S

43

Base Mounted

Up to 7500 W

--

D,L,W

--

D,L,W

--

10 kW to 30 kW

I

S

43

I

S

43

Over 30 kW

I

S

63

I

S

63

DIESEL ENGINES

Up to 19 kW

I

S

63

I

S

63

20 kW to 75 kW

I

S

89

I

S

89

Over 75 kW

I

S

114

I

S

114

Notes:

1.

For suspended floors lighter than 100 mm (4 inch) concrete, select

deflection requirement from next higher span.

2.

If equipment is located in a building separated from building

housing patients, isolator pads are not required.

3.

Direct bolt fire pumps to concrete base. Provide pads (D) for

domestic water booster pump package.

4.

This chart applies to non-seismic areas. If in VA Seismic Area A

or B, substitute DS for D, and SS for S.

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