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Useful links and handy information.
Some soil investigation companies whose reports have been passed to me:
Albury S.I. Ltd, Godalming, Surrey, 01428 684836
Constructive Evaluation Ltd, Chichester, Sussex, 01243 533499. This company appears to have several offices.
Geo-Environmental Services Ltd, Brighton, 01273 699399
Geoinvestigate Ltd, North Yorkshire, 01642 713779
ground&water, Alton, Hampshire, 0333 600 1221
Ground Engineering, Peterborough, Cambs, 01733 566566
Herts and Essex Site Investigations, Ware, 01920 822233
Listers Geotechnical Consultants, Towcester, Northants, 01327 860060. This company appears to have several offices.
MiniSoils Ltd. This company appears to have several offices.
Cheshire, 0161 980 0044.
Bath, 01225 425657
Soil Consultants, High Wycombe, 01494 712494
Southern Testing, East Grinstead, 01342 333100
Structural Soils Ltd, Bristol, 0117 947 1000.
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Steel suppliers, formwork accessory suppliers and steel reinforcement information.
Links
Major reinforcing suppliers are
Hy-Ten
Express Reinforcements
BRC
Rainham Steel
Steel Reinforcement Suppliers
Cannon Steels
Accessories suppliers are
"Buildspan - the concreters warehouse"
Speedcrete
Max Frank
Lemon Groundworks
Formwork Direct
Siteright
Precon Products
ScaffoldboardsUK, Allscaff email: contracts at allscaff.co.uk
I found the following information
on the Steel Reinforcement Suppliers web site.
British Standard preferred meshes in stock size sheets 4.8m long 2.4m wide.
| British
| Longitudinal Wires
| Cross Wires
| Mass
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| Standard Reference
| Size mm
| Pitch mm
| Area mm²/m
| Size mm
| Pitch mm
| Area mm²/m
| kg/m²
| kg/sheet
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Square Mesh Fabric
|
| A393
| 10
| 200
| 393
| 10
| 200
| 393
| 6.16
| 70.96
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| A252
| 8
| 200
| 252
| 8
| 200
| 252
| 3.95
| 45.5
|
| A193
| 7
| 200
| 193
| 7
| 200
| 193
| 3.02
| 34.79
|
| A142
| 6
| 200
| 142
| 6
| 200
| 142
| 2.22
| 24.57
|
| A98
| 5
| 200
| 98
| 5
| 200
| 98
| 1.54
| 17.74
|
|
Structural Fabric
|
| B1131
| 12
| 100
| 1131
| 8
| 200
| 252
| 10.9
| 125.57
|
| B785
| 10
| 100
| 785
| 8
| 200
| 252
| 8.14
| 93.77
|
| B503
| 8
| 100
| 503
| 8
| 200
| 252
| 5.93
| 68.31
|
| B385
| 7
| 100
| 385
| 7
| 200
| 193
| 4.53
| 52.19
|
| B283
| 6
| 100
| 283
| 7
| 200
| 193
| 3.73
| 42.97
|
| B196
| 5
| 100
| 196
| 7
| 200
| 193
| 3.05
| 35.14
|
|
Long Mesh Fabric
|
| C785
| 10
| 100
| 785
| 6
| 400
| 70.8
| 6.72
| 77.41
|
| C636
| 9
| 100
| 636
| 6
| 400
| 70.8
| 5.55
| 63.94
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| C503
| 8
| 100
| 503
| 5
| 400
| 49
| 4.34
| 50.00
|
| C385
| 7
| 100
| 385
| 5
| 400
| 49
| 3.41
| 39.28
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| C283
| 6
| 100
| 283
| 5
| 400
| 49
| 2.61
| 30.07
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Wrapping Fabric (basementexpert note: very thin)
|
| D49
| 2.5
| 100
| 49
| 2.5
| 100
| 49
| 0.77
| 8.87
|
| Size
| 6mm
| 8mm
| 10mm
| 12mm
| 16mm
| 20mm
| 25mm
| 32mm
| 40mm
|
| Area (mm²)
| 28.3
| 50.3
| 78.5
| 113.1
| 201.1
| 314.2
| 490.9
| 804.2
| 1256.6
|
| Weight kg per m
| 0.222
| 0.395
| 0.616
| 0.888
| 1.579
| 2.466
| 3.854
| 6.313
| 9.864
|
| Approx no. of 12m bars per tonne
| 375
| 211
| 135
| 94
| 53
| 34
| 22
| 13
| 8
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The mesh in this image has flying ends. When you lap sides you aren't wasting steel with identical bars side by side against each other, you aren't making a mountain at corners where 4 sheets need to overlap, and if you don't need full sheets down an edge you can plan to throw away the bit with 2 bars missing so less money thrown away.
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(I took this image from www.brcmcmahon.com, a supplier in Ireland)
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I always fix walls with A393 mesh laid long side down with the tails upwards. Therefore, when I am filling and pokering concrete only 1.9m high the poker is not obstructed by horizontal bars 2.3m high. The work of concreting and pokering is easier. And I buy plenty of straight 10mm bar to fix to the top of the wall by hand, which is pretty easy with all the steel I'm fixing to already held firm in set concrete.
Resin Anchor
I use two different resin anchor chemicals for two very different jobs.
For fixing resin rod into the floor blinding as a levelling aid, I use a general purpose resin such as Rawlplug R-KEM ll, which is styrene free and a Screwfix code is 32863.
For fixing rebar into concrete where pullout strength is required, I use Rawlplug R-KER ll, which is a hybrid resin and a Screwfix code is 150GR.
Resins sometimes have different setting times. A W could mean Winter and faster curing. A S could mean Summer and slower curing.
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What do those codes mean?
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On a bag of cement, on a concrete delivery ticket.
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First a word of warning. These are UK codes. In the USA, for instance, a similar code will mean something entirely different.
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Cement types and composition permitted by EN 197-1
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Cement type
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Notation
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Clinker%
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Addition%
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CEM1 or CEM I
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Portland cement CEM I
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95-100
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-
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CEM2 or CEM II
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Portland-slag cement
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II/A-S
II/B-S
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|
80-94
65-79
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6-20
21-35
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|
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Portland-silica fume cement II/A-D
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90-94
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6-10
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|
|
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Portland-pozzolana cement
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II/A-P
II/B-P
II/A-Q
II/B-Q
|
|
80-94
65-79
80-94
65-79
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6-20
21-35
6-20
21-35
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|
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Portland-fly ash cement
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II/A-V
II/B-V
II/A-W
II/B-W
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|
80-94
65-79
80-94
65-79
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6-20
21-35
6-20
21-35
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|
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Portland-burnt shale cement
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II/A-T
II/B-T
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|
80-94
65-79
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80-94
65-79
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Portland-limestone cement
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II/A-L
II/B-L
II/A-LL
II/B-LL
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|
80-94
65-79
80-94
65-79
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6-20
21-35
6-20
21-35
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Portland-composite cement
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II/A-M
II/B-M
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80-94
65-79
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80-94
65-79
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CEM3 or CEM III
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Blastfurnace cement
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III/A
III/B
III/C
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|
35-64
20-34
5-19
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36-65
66-80
81-95
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CEM4 or CEM IV
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Pozzolanic cement
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IV/A
IV/B
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65-89
45-64
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11-35
45-64
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CEM5 or CEM V
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40-64
20-38
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36-60
61-80
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Notes.
All cements may contain up to 5% minor additional constituent (mac)
CEM V/A Composite cement contains 18-30% blastfurnace slag
CEM V/B Composite cement contains 31-50% blastfurnace slag
Proportions are expressed as % of the cement nucleus (excludes calcium sulfate)
A bag of cement will be one of three classes, 32.5, 42.5 and 52.5
Each figure refers to the working time. Nothing to do with strength.
32.5 75 minutes
42.5 60 minutes
52.5 45 minutes
N means Normal setting time while R means Rapid. Some readymix companies use N during the summer and R during the winter.
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