BS 7307-1:1990

National foreword
Committees responsible
Methods
1. Scope and field of application
2. References
3. General
3.1 Methods of measurements
3.2 Influence of deviations from reference conditions
Section one: Measuring methods for those measurements
which can be carried out both in factories and on
building sites
4. Size of components
4.1 Length and width
4.2 Thickness or depth
4.3 Accuracy table
5. Squareness (perpendicularity) of components
5.1 Angular deviation
5.2 Parallelism
5.3 Accuracy table
6. Straightness and camber of components
6.1 Straightness
6.2 Designed camber
6.3 Accuracy table
7. Flatness and skewness of components
7.1 Principles of measurement
7.2 Overall flatness
7.3 Local flatness
7.4 Skewness
7.5 Methods and equipment when measuring components
     according to the box principle
7.6 Accuracy table
Section two: Measuring methods for those measurements
which can be carried out on building sites only
8. Position in the horizontal plane
8.1 Deviations in relation to structural grid lines
8.2 Deviations in relation to secondary lines parallel
     to the building
8.3 Deviations in relation to secondary lines
     perpendicular to the building
8.4 Accuracy table
9. Deviations from level (levelling)
9.1 Accuracy table
10. Verticality
10.1 Using a theodolite/optical plumbing instrument
10.2 Using a clinometer
10.3 Using a plumb bob
10.4 Accuracy table
11. Eccentricity
11.1 Accuracy table
12. Position in relation to other components (openings
     and spaces)
12.1 Accuracy table
13. Flatness, straightness designed camber
13.1 Accuracy table
14. Other important deviations
14.1 Length of bearing surface
14.2 Joint width
14.3 Joint step
14.4 Accuracy table
Section three: Measuring instruments
15. Measuring instruments
15.1 General
15.2 Sliding calipers and slide gauges
15.3 EDM (electro-optical distance measuring)
      instruments
15.4 Go/No Go gauges
15.5 Clinometers (inclinometers)
15.6 Laser instruments
15.7 Spirit-levels
15.8 Water levels
15.9 Levelling instruments
15.10 Micrometer measuring bars
15.11 Micrometer screw gauges
15.12 Measuring magnifiers
15.13 Measuring rods
15.14 Telescopic measuring rods
15.15 Measuring wedges
15.16 Optical plumbing instruments
15.17 Plumb bobs
15.18 Position pieces
15.19 Right-angle prisms
15.20 Squares
15.21 Straightedges
15.22 Retractable steel pocket tapes
15.23 Steel tapes
15.24 Targets (aiming targets)
15.25 Theodolites
15.26 Tripods
Annex - Tape corrections
A.1 Sag correction
A.2 Temperature correction
A.3 Slope correction

Gives alternative measuring methods for the determination of shape, dimensions and dimensional deviations of buildings and building products which are relevant to fit.

This International Standard gives some alternative measuring methods for the determination of shape, dimensions and dimensional deviations of buildings and building products which are relevant to fit. The methods can also be applied when accuracy data are being collected in factories or on building sites. Information is given about deviations of parts of buildings or of building products which can be determined with the equipment described.

The measuring methods concern primarily those objects the faces of which are rectilinear in shape and which have a modulus of elasticity larger than 35 kPa, for example concrete, wood, steel, hard plastic. Building products consisting of glass wool and similar soft materials are not the subject of this International Standard.

Rules for quality control in all stages of measurement such as frequency checks, place, time, etc., are not covered by this International Standard.

Part two of this International Standard gives the position of measuring points to be used in the measurement described in this part.

To facilitate cross-referencing, the same numbering is used in the two parts of this International Standard.