- Low Unit Weight, less than 20kg
- Complies with HSE Guidelines on Manual Handling
- Design flexibility with 140mm width
- Wide range of compressive strengths 7.3 - 40N/mm2
- Performance Characteristics identical to conventional
solid Intercrete Units
- Available as standard or close texture paint grade
version
- Manufactured to BS EN 771-3 & Associated Test
Standards
Description
A general purpose solid masonry unit produced using natural
dense Class 2 aggregate.
Designed to allow Architects' and Designers' to specify
a 140mm wide unit. Its unit weight being less than 20
kg makes it suitable for single person repetitive lifting.
With strengths
of 7.3N/mm2 to 40N/mm2. If preferred they can be laid
flat to produce a wall of 215mm
thick where load distribution is required.
Application and Classification
Intercrete Midi units are intended for use in walls above
and below DPC in class 1 to 3 soil
conditions as defined in BS5628 pt3 2001 and BRE Digest
363 1996.
They can be plastered rendered or drylined. Midi units
are also available in close textured paint grade version
for walls to be built fair left undecorated or paint finished
they are particularly suitable where high strength and
acoustic sound requirements are needed.
| Format
and Size |
Physical
Properties |
140mm Solid Units
Facework size 290mm x 215mm x 140mm
Tolerances as EN 771-3 Table 1 and
EN 772-16 Category D1.
Unit length and height mm +3 -5
Unit Width mm +3 -5 |
Relationship of density
/ strength
EN 772-13 Gross Dry Density
7.3 N/mm2 -17.5 N/mm 2000 kg/m3
22.5 N/mm2 - 40 N/mm 2050 kg/m3 |
Design Properties
| Moisture
Movement |
Weight |
As tested to BS EN 772-14
: 2002
Total movement = 0.27mm/m |
Average strength N/mm2
7.3, 10.4, 17.5 to 40.
Unit weight (kg) 18
Laid weight 140mm wide wall (kg/m2) 280
Laid weight 215mm wide wall (kg/m2) 430
Calculated at 3% moisture content. |
Water Vapour Permeability
EN 1745 : 2002 Table A3 Water Vapour diffusion coefficients
μ 5/15
Thermal Movement
Coefficients of Linear expression is 10x10- 6/0 c
Thermal Conductivity
(Based on Table 3.1 CIBSE Guide 1999)
| Concrete Density 1900-2000kg/m3 |
W/mK (Lambda value) |
| |
3% |
5% |
| Solid |
1.28 |
1.37 |
Thermal Resistance
at 3% Moisture Content 'R' m2 K/W
290mm x 215mm x 140mm 0.11
‘U’ value must
be calculated using method in BS EN ISO 6946
Water
Absorption by Capillarity
Test method EN 772-11 - No performance determined
Durability against freeze thaw
- No performance determined
Not to be exposed
Shear Bond Strength
Declared Value 0.15N/mm2 BS EN 998-2 Annex C
Fire
Resistance
Intercrete MIDI Units are clasified Euroclass A1 as defined
in EN ISO 1182
Resistant periods based on BS 5628 Part 3
| Wall
Thickness |
140mm
|
215mm |
| Loadbearing |
2hrs |
2hrs |
| Non Loadbearing |
3hrs |
6hrs |
The application of plaster finishes in all cases to the
units will
extend periods by approximately 1/2 hour.
Sound
Reduction (RW)
(Data based on Mass Law)
Standard & Close Textured (values in dB)
| Wall
Thickness |
140mm |
215mm |
| No Finish |
49 |
50 |
| Painted |
50 |
51 |
| Lightweight Plaster* |
51 |
54 |
| Dense Plaster* |
52 |
55 |
| Dry Lined* |
51 |
54 |
NOTE: Sound Reduction figures RW (dB) based on fully Ironed
jointwork and sealed abutments to soffite and structure
including all
finishes (i.e. no air leakage gaps) 215mm refers to 140mm
units laid flat. * Assumed
finish to both sides.
Having a width of 140mm this masonry unit does not comply
with
Building Regulations AD E Wall Type 1.1. for Party / Separating
Walls, the specification states coursing to be 110mm. However
if a
decision is made on precompletion testing using MIDI Units,
Empirical experience shows that the mass of the wall therefore
sound reduction quality would be the same as a traditional
Intercrete 100mm Unit level flat construction.
Delivered Loads Data
Prices quoted per 10 units.
15 units to m2 of wall.
All prices include mechanical off-loading and apply to full
loads.
Load sizes may vary between 19 tonne Rigids, 20 - 27 tonne
Artics.
15 tonne loads available with additional surcharge.
Part Loads are subject to special quotations.
| Units
per pack |
72 |
| Weight per pack |
1.27 tonne |
Approx no of units per
15 tonne load |
864 |
Approx no of units per
19 tonne load |
1008 |
Approx no of units per
Artic load |
1512 |
Units should be stored on firm level ground no more than
2 packs high.
Quality
Control
Interfuse Ltd operate a formalised QA system at both Syston
and Gainsborough plants. All masonry units are subject to
stringent quality control checks and are tested daily in
our
own laboratory.
A documented factory production control system is in operation
with regular checks made
on raw materials, production and finished units. A stock
control system is in operation with written procedures for
non-conforming products. All products are produced to the
current European Standards.
Marking
Each pack is marked for traceability of product and unit
clarification as given on the
delivery ticket. |
