Measurement Flashcards
What tools do you measure with?
Laser/disto
Trundle wheel
Scaled plan
Promap
Tape measure
In what instance would you use a laser, tape measure, trundle wheel, OS map + promap?
Laser – when measuring a residential property
Tape measure – use for narrow areas or if bright light, shiny surfaces was affecting laser measurements
Trundle wheel – use to measure site boundaries
OS map/pro map – use to measure site area
What is Promap?
Software used to measure land area
What should be done before calculating the site area on Promap?
Check boundaries on site with OS plan + land registry title document
How do you know where a site boundary is?
Land registration
Title
Fencing
Why do you have to reference to title plans?
To ensure boundaries are correct
Why can measuring software be inaccurate?
Hard to pinpoint the exact boundaries or surfaces to measure online
What are the limitations of a laser measure?
Does not function well in bright light
Less accurate over distances up to 200m
How does a laser measure work?
Measures how long it takes the laser pulse to be reflected from a surface
How would you know if your laser disto needs calibrating?
Would show an error message
However, would always send device to be calibrated annually + regularly check it against known distances
Tell me about a strength and weakness of a measuring technique you have used
Laser/disto
Accurate + easy to use
However, does not function well in bright light + less accurate over distances up to 200m
When would you use a tape measure?
For narrow areas
When would you use a trundle wheel?
When measuring land boundaries
What could be used to measure the boundaries whilst on site?
Trundle wheel
What are the limitations of a trundle wheel?
Human error affecting accuracy
Does not account for changes in level
Can be inconvenient to use
How do you measure a development site?
Promap (remember to check boundaries accurately on site with OS plan or Land Registry documents)
Trundle wheel
What would you require on a HM Land Registry compliant plan?
Correct scale (1:1,250 – 1:500 for urban properties, 1:2,500 for rural properties)
Scale bar
Red line boundaries
Orientation - north arrow
Details including buildings, roads, access points
What is the accuracy of a laser?
Accurate to within 1.5mm
Less accurate over distances up to 200m
What tolerance of accuracy is generally acceptable?
+/- 10%
How do you calibrate a laser?
Send it off to manufacturer to calibrate it annually
Regularly check it using a known distance (do this approx. 10 times + must be within 2mm)
Do you need to calibrate a disto?
Yes – need to be checked annually (send off to manufacturer)
Can also regularly check it using a known distance (do this approx. 10 times)
How do you confirm a laser measure is correctly calibrated?
Check accuracy against a known distance + record on a log
How can you ensure accurate measurements?
Take several measurements
Check with scaled plans
Use tape/rod for tight areas
Ensure disto is calibrated
Why do you take check measurements?
To ensure accuracy before reporting to my client
How do you ensure that you present your measurements clearly + coherently?
By using or drawing floor plans + recording measurements on there
When I get back to the office, I use an excel spreadsheet to calculate the overall area + use this for reports
What scale might be used for a single room?
1:50
What scale might be used for a road map?
1:50,000
What scale might be used for a location plan?
1:2,500
What scale might be used for a building plan?
1:100
What scale might be used for a street plan?
1:25,000
What are the various scales when measuring?
1:50 = room plan
1:100 = building plan
1:2,500 = location plan
1:25,000 = street plan
1:50,000 = road map
What is the conversion factor from acres to hectares?
1 acre = 0.4 hectares
What is the conversion factor from hectares to acres?
1 hectare = 2.471 acres
What is the conversion factor from sqm to sqft?
1sqm = 10.764 sqft
How can you measure land?
Trundle wheel
Promap / other software
Planimeter
Are there any RICS documents around measurement?
Professional Standard Property Measurement (2nd edn), 2018
Guidance Note Code of Measuring Practice (6th edn), 2015
IPMS All Buildings, 2023
Do you have to follow the RICS documents?
Professional Standard Property Measurement – mandatory
Guidance Note COMP – provides guidance on best practice. Need a strong reason to deviate from this. I would follow guidance
What is the current measurement guidance published by RICS?
RICS Professional Standard Property Measurement (2nd edn), 2018
When did the RICS Professional Standard Property Measurement (2nd edn) become effective?
1 May 2018
What does the RICS Professional Standard Property Measurement (2nd edn), 2018 comprise of?
- Professional standard - property measurement
- RICS IPMS data standard
What is the aim of RICS Property Measurement 2018?
Aims to avoid current inconsistent definitions of measurement in different countries + bring greater global transparency
What are the general principles of the RICS Property Measurement 2018?
- Must state measurement date
- Must state measurement standard adopted
- State scale of plans used
- Retain measurements + calculations
- State RICS member responsible for measurement
- Advise clients about benefits of IPMS
- Document reason for departure if IPMS is not used
- Adopt IPMS when measuring office + residential space
What do you advise your clients surrounding IPMS?
Advise them of the benefits of using IPMS
Worldwide standard which improves consistency + transparency
Tell me about your understanding of RICS Property Measurement
Aims to avoid current inconsistent definitions of measurement in different countries + bring greater global transparency
Split into two parts
Part 1 – Professional Standard: property measurement (applies to all properties + includes IPMS measurements for residential + office buildings)
Part 2 – RICS IPMS Data Standard
Document is currently in the process of being updated following the publication of IPMS: All Buildings
How do you comply with the RICS Property Measurement?
Always state measurement date + standard adopted
Retain measurements + calculations
Adopt IPMS when measuring residential properties unless my client instructs me not to do otherwise
If client does not wish to report on IPMS basis, I record reason for not using IPMS
What must RICS members do when measuring office or residential buildings?
State date measurements are taken
State standard adopted
Clearly document calculations + measurements
State conversion factor + any rounding
How does RICS Property Measurement differ from the Code of Measuring Practice?
Includes IPMS for Offices + Residential buildings
Applies to all building types – COMP primarily focuses on commercial properties
List the measurement types in RICS Property Measurement 2018
IPMS 1
IPMS 2 (office + resi)
IPMS 3 (office)
IPMS 3a (resi)
IPMS 3b (resi)
IPMS 3c (resi)
Which IPMS standards have been adopted in RICS Property Measurement?
Residential
Offices
Have any other IPMS standards been published (or consulted on) but not yet adopted by the RICS in Property Measurement?
Industrial
Retail
All building classes
What do you know about the Code of Measuring Practice?
Was effective in May 2015
Document outlines core definitions, including GEA, GIA + NIA
Aims to ensure consistency in property measurement for different buildings, except for offices + residential buildings
List the measurement types in the Code of Measuring Practice 2015
GEA
GIA
NIA
EFA (residential only)
What does the Code of Measuring Practice (6th edn) still apply to?
Industrial
Retail
Other property types (NOT residential or offices)
What measurement basis would you use for office property?
Haven’t measured an office building before, but would adopt IPMS standards as per the RICS Professional Standard Property Measurement 2018
Would also adopt NIA depending on client’s instruction
What measurement basis would you use for residential property?
Would adopt IPMS as per RICS Property Standard Property Measurement 2018
Would also adopt GIA depending on client’s instruction
What measurement basis would you use for industrial property?
Haven’t measured an industrial property before, but would adopt GIA as per the COMP
Would also dual report by adopting IPMS from All Buildings Document
What measurement basis would you use for retail property?
Haven’t measured an office building before, but would adopt NIA as per the COMP
Would also dual report by adopting IPMS from All Buildings Document
Is early adoption of IPMS recommended on publication of the new standards?
Yes
When did the Code of Measuring Practice become effective?
May 2015
What was the key change between the 1st + 2nd editions of Property Measurement?
Adoption of IMPS for residential
What is EFA?
Effective floor area
Used in UK for council tax banding of flats + maisonettes
What is included in EFA?
Included – all usable areas, e.g. living rooms, bedrooms, kitchens
Excluded – bathrooms, showers, toilets, stairwells, balconies, areas with headroom less than 1.5m
What is the definition of the Internal Dominant Face?
Internal finish comprising more than 50% of floor to ceiling height for each IDF wall section
If this does not occur, the Finished Surface is deemed to be the IDF
How is IDF calculated?
It is whatever finish makes up more than 50% of the wall area
What would you do if you had a window on your IDF?
Depends on whether window covered more than 50% of wall
If it did, would measure to wall
If didn’t, would measure to internal wall
What is the internal finish?
Surface of internal walls of a building
What is the IDF wall section?
Each internal finish of a section of an external wall, ignoring columns, that is either recessed from or sticks out from its adjacent section
What is a finished surface?
Wall surface directly above the horizontal floor junction, ignoring fittings, skirting boards, pipework, etc.
What is a demising wall?
Wall between adjoining occupiers’ space or an occupiers’ space + standard facilities
What does IPMS stand for?
International Property Measurement Standards
What is IMPS?
International Property Measurement Standards
Global standard aimed at creating a uniform approach to measuring buildings
Do we have to follow IPMS in the UK?
Not legally mandatory, but highly recommended
RICS has adopted IPMS for residential buildings + offices into Professional Standards