Measurement

Question 1

What is the difference between a goad plan and an OS plan?

Answer 1

A goad plan is copyrighted by OS but allows for editing of a buildings name. It also shows different levels, unlike an OS plan.

Question 2

What would you include in an NIA measurement

Answer 2

• Atria with clear height above and entrance halls if not used in common
• Notional lift lobbies and fire corridors
• Kitchens
• Built in cupboards
• Ramps, slopping areas and steps within the useable space
• Areas occupied by ventilation and heating grilles
• Areas occupied by skirting and perimeter trunking
• Areas occupied by non structural walls

Question 3

What would you exclude from an NIA?

Answer 3

• WCs
• Plant and lift rooms
• Stairwells
• Meter and service cupboards and risers
• Areas less than 1.5m in height
• Cleaner rooms
• Permanent circulation areas
• Space occupied by permanent and continuous a/c, heating or cooling apparatus if protrudes more than 0.25m into useable area or the space it occupies makes it substantially unusable.
• Areas substantially unusable w dimensions btw opposites faces of less than 0.25m

Measurements should be taken up to the glazing for full height glazing unless elements of the window structure render the space substantially unusable

Question 4

What are the commonly used scales for plans?

Answer 4

1: 50 room plan
1: 100 building plan
1: 1250 street/ location
1: 2500 location
1: 50000 road map

Question 5

What level of accuracy is expected in measuring?

Answer 5

Depending on building but code states between 1-10% but very dependent on measuring subject.

Question 6

How would you measure land?

Answer 6

Check boundaries with OS plan prior to using Promap. Use trundle wheel.

Question 7

What would you include in a GIA?

Answer 7

Internal walls and partitions
Columns stairwells lift wells vertical ducts
Entrance halls
Lift room and plant rooms
Voids over stairwells
Pavement vaults
Garages
Conserve stories

Question 8

What would you exclude from GIA?

Answer 8

Perimeter wall thickness
External projections
External open sides balconies
Canopies
Greenhouses

Question 9

When would you use GEA

Answer 9

Planning
Rating or council tax
Building cost estimation

Question 10

What size is a brick?

Answer 10

215mm x 102.5mm x 65mm

Question 11

What scales are used on plans?

Answer 11

1: 50 = Room Plan (1cm = 50cm)
1: 100 = Building Plan
1: 1250 = Street / Location Plan
1: 2500 = Location Plan
1: 5000 = Road/Walking Map

Question 12

What size is a brick?

Answer 12

215mm x 102.5mm x 65mm

Question 13

What scales are used on plans?

Answer 13

1: 50 = Room Plan (1cm = 50cm)
1: 100 = Building Plan
1: 1250 = Street / Location Plan
1: 2500 = Location Plan
1: 5000 = Road/Walking Map

Question 14

How does GIA differ from NIA?

Answer 14

GIA is measured up to perimeter walls and includes structural partitions.
NIA measures usable area only.

Question 15

Have you measured an office building? – How do you deal with radiators?

Answer 15

Depends – if intermittent include the space, continuous or more than 0.25m you take out.

Question 16

What basis of measurement do you use for rating?

Answer 16

How you would normally measure for that type unit
NIA – offices, shops
GIA – supermarket, industrial, warehousing, leisure

Question 17

What source of errors could there be in measurements?

Answer 17

Human error – misreading, additional check measurements.
Unsure what to in/exclude – take enough measurements to calculate later on
Equipment error – faulty equipment which should be checked and calibrated quickly/annually.

Question 18

What is an appropriate level of accuracy?

Answer 18

Depends on the subject property, how difficult it is to measure, site specific conditions
Depending on this – may range from +/- 1% to +/- 10%.
Greater margin acceptable measuring a car park compared to a City of London office.

Question 19

How does a laser disto work?

Answer 19

The time for the laser to go there and back

Question 20

What does GEA include?

Answer 20

Area of building measured externally at each floor level
Everything in the main envelope of the building.
Atria
Internal balconies
Loading bays
Pavement vaults
Garages
Conservatories

Question 21

What does GEA exclude?

Answer 21

Canopies
Roof terraces – state area separately as they may have value
Open-sided balconies
External fire escapes
Open vehicle parking areas
Greenhouses

Question 22

What is an internal eaves height?

Answer 22

The clear height between the floor and the lowest point on the underside of the roof, such as eaves.

Question 23

What is a site depth?

Answer 23

The measurement from the front to rear boundaries

Question 24

What is shop depth?

Answer 24

The measurement from the notional display window to the rear of the retail area, including the thickness of the display window

Question 25

What is built depth?

Answer 25

The maximum external measurement from the front to the rear walls

Question 26

What is gross frontage?

Answer 26

The overall external measurement in a straight line across the front of the building from the outside of the external walls. Or the centre line from the party walls.