BS 4046:1991
Current
The latest, up-to-date edition.
Specification for compressed straw building slabs
Hardcopy , PDF
English
28-02-1991
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Committees responsible
Foreword
Specification
1 Scope
2 Definitions
3 Classification
4 Test for performance and physical characteristics
5 Dimensional tolerances
6 Taper profile
7 Squareness
8 Mass
9 Moisture content
10 Modulus of elasticity
11 Bending strength
12 Resistance to impact
13 Screw holding
14 Thermal conductivity
15 Boron content
16 Dimensional changes associated with changes in
relative humidities
17 Marking
Appendices
A Methods of test
B Guidance on the use of compressed straw building
slabs
Tables
1 Summary of tests for performance and physical
characteristics
2 Test levels for dimensional tolerances
3 Test levels for slab mass
4 Test levels for modulus of elasticity and bending
strength
Figures
1 Typical arrangement of longitudinal voids
2 Profile of taper edged slabs
3 Positions for measurement of slab thickness and
taper depth
4 Measurement of squareness of boards
5 Test apparatus for determining the modulus of
elasticity and bending strength
6 Load deflection curve for determining the modulus of
elasticity
7 Impact strength test rig
Classification of slab types for internal use in buildings, test methods, acceptance levels, marking requirements and methods of sampling and conditioning. Includes guidance on use.
| Committee |
B/541
|
| DevelopmentNote |
Supersedes 89/17168 DC and BS 4046-2(1971) (07/2005) Reviewed and confirmed by BSI, October 2012. (09/2012)
|
| DocumentType |
Standard
|
| Pages |
20
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard specifies requirements for compressed straw building slabs when used internally in buildings. The classification of slab types, their performance characteristics and physical properties, test methods and marking requirements are specified.
Appendix A gives methods of sampling, conditioning and preparation of test specimens and test pieces and methods of tests.
Appendix B gives guidance on the use of compressed straw building slabs. This includes particular reference to the need for proper sealing of the cut edges to provide continuity of the surface covering and protection from moisture, mould growth and insect pests.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
| DEFSTAN 81-25/1(1973) : 1973 AMD 2 | TAPE, PRESSURE SENSITIVE ADHESION (WATER RESISTANT FABRIC) |
| BS 1521:1972 | Specification for waterproof building papers |
| DEFSTAN 75-2/4(2004) : 2004 | TAPE, PRESSURE-SENSITIVE ADHESIVE (FABRIC) |
| BS 1210:1963 | Specification for wood screws |
| DEFSTAN 81-25/3(1998) : 1998 | TAPE, PRESSURE-SENSITIVE ADHESIVE (WATER-RESISTANT FABRIC) |
| DEFSTAN 75-2/1(1976) : 1976 | TAPE, PRESSURE SENSITIVE ADHESIVE (FABRIC) |
| BS 4022:1970 | Specification for prefabricated gypsum wallboard panels |
| DEFSTAN 75-2/3(1999) : 1999 | TAPE, PRESSURE-SENSITIVE ADHESIVE (FABRIC) |
| DEFSTAN 81-25/2(1988) : 1988 AMD 1 1991 | TAPE, PRESSURE-SENSITIVE ADHESIVE (WATER RESISTANT FABRIC) |
| BS 874-2.1:1986 | Methods for determining thermal insulating properties. Tests for thermal conductivity and related properties Guarded hot-plate method |
| BS 1191-1:1973 | Specification for gypsum building plasters Excluding premixed lightweight plasters |
| DEFSTAN 75-2/2(1988) : 1988 | TAPE, PRESSURE-SENSITIVE ADHESIVE (FABRIC) |
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