Brick, Block & Mortar
323 sources in the library on brick, block & mortar. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 5 of 9.
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Birtley Lintels (Birtley Group)
CB70 standard duty cavity wall lintel, cavity 70-85 mm, outer leaf 100 mm, inner leaf 100 mm. Explicitly not suitable for point loads or concrete floors. SWL/UDL by length band: 750-1200 mm 15 kN, 108 mm high, 5.8 kg/m; 1350-1500 mm 15 kN, 108 mm, 7.1 kg/m; 1650-2100 mm 20 kN, 143 mm, 8.3 kg/m; 2250-2400 mm 22 kN, 148 mm, 10.1 kg/m; 2550-3000 mm 26 kN, 185 mm, 11.5 kg/m; 3150-3900 mm 26 kN, 201 mm, 14 kg/m. Supergalv coating to EN 1461, high strength structural steel to EN 10025-2, fire tested to BS 476-20:1987. No baseplate and no factory-fitted insulation, which Birtley say reduces thermal bridging.
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Birtley Lintels (Birtley Group)
HD90 heavy duty cavity wall lintel, cavity 90-105 mm, outer leaf 100 mm, inner leaf 100 mm, requiring solid fully jointed blockwork infill to the inner leaf. SWL/UDL by length band: 750-1800 mm 70 kN, 231 mm high, 14.8 kg/m; 1950-2400 mm 60 kN, 231 mm; 2550-2700 mm 60 kN, 232 mm, 17.6 kg/m; 2850-3000 mm 55 kN; 3150-3600 mm 45 kN; 3750-4200 mm 40 kN; 4350-4800 mm 35 kN; 4950-5100 mm 25 kN. Birtley state their standard cavity lintels deliver up to a 55% improvement on the SAP default thermal bridging value.
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Birtley Lintels (Birtley Group)
HDX90 extra heavy duty cavity wall lintel, cavity 90-105 mm, outer leaf 100 mm, inner leaf 100 mm, requiring solid fully jointed blockwork infill to the inner leaf. SWL/UDL by length band: 750-2100 mm 100 kN; 2250-3300 mm 80 kN; 3450-4200 mm 70 kN; 4350-4800 mm 60 kN; 4950-5100 mm 45 kN. Height is a constant 236 mm and weight a constant 23.3 kg/m across the range. Fire tested to BS 476-20:1987.
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Birtley Lintels (Birtley Group)
SB100 standard duty internal wall box lintel for loadbearing internal block walls (plastered), 100 mm wall, insulated version available. SWL/UDL by length band: 750-1500 mm 15 kN, 76 mm high, 4.9 kg/m; 1650-1800 mm 20 kN, 142 mm, 6.7 kg/m; 1950-2700 mm 20 kN, 144 mm, 8.3 kg/m; 2850-3600 mm 25 kN, 215 mm, 10.8 kg/m; 3750-4500 mm 30 kN, 215 mm, 13 kg/m; 4650-4800 mm 28 kN; 4950-5100 mm 24 kN. Birtley hot-dip galvanize after fabrication, which they say gives up to 50% more zinc protection than other approved coatings.
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Birtley Lintels (Birtley Group)
Supatherm thermally broken steel lintels. Psi values in W/mK, calculated on a 100 mm cavity with full fill insulation and a 0.45 W/mK block. ST90 by length: 750-1050 mm 0.098 to 0.057; 1200-1350 mm 0.053 to 0.048; 1500-1650 mm 0.043 to 0.039; 1800-2100 mm 0.06 to 0.052; 2250-2400 mm 0.048 to 0.043; 2550 mm 0.039; 2700-3000 mm 0.055 to 0.051; 3300-3900 mm 0.037 to 0.031. ST90HD at 1800 mm is 0.04 and ST90HDX at 1800 mm is 0.043. Birtley claim up to 80% reduction in heat loss against a standard cavity lintel, improving DFEE by up to 3% and DER by over 1%. Cavity widths 90 to 150 mm, lengths 750 to 3900 mm, hot dip galvanized to EN 1461, CE marked to BS EN 845-2.
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British Steel
Dimensions and properties for Advance UK equal angles. Sample rows: 120 x 120 x 8 weighs 14.7 kg/m, area 18.7 cm2, root radius 13 mm, toe radius 6.5 mm, distance to centre of gravity 3.23 cm, Ixx and Iyy 256 cm4, Iuu 411 cm4, Ivv 107 cm4; 120 x 120 x 15 weighs 26.6 kg/m with I 445 cm4; 150 x 150 x 10 weighs 23.0 kg/m, area 29.3 cm2, I 624 cm4, Iuu 990 cm4. Sections are CE and UKCA marked and the mill is BES 6001 certified.
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British Steel
Dimensions and properties for Advance UK unequal angles. Sample rows: 200 x 100 x 10 weighs 23.0 kg/m, area 29.2 cm2, root radius 15 mm, toe radius 7.5 mm, Cx 6.93 cm, Cy 2.01 cm, Ixx 1219 cm4, Iyy 210 cm4, Iuu 1290 cm4, Ivv 135 cm4; 200 x 100 x 15 weighs 33.7 kg/m with Ixx 1759 cm4; 200 x 150 x 12 weighs 32.0 kg/m, area 40.8 cm2, Ixx 1653 cm4, Iyy 803 cm4.
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C-Tec (CT1)
Manufacturer technical data for CT1 hybrid polymer sealant and construction adhesive. Cure rate is 3 to 6 mm in 12 to 48 hours. Hardness to DIN 53505 is 55 degrees Shore A, with a 42 degrees Shore A variant listed. Substrate bonding tensile force is 3.07 N/mm2, equal to 31.3 kg/cm2. Fully cured tensile strength is quoted at 22 kg/cm2 and shear strength at 11 kg/cm2. The manufacturer claims three times stronger bonding and 250 per cent more elongation than traditional alternatives. It carries EC1 Plus certification and A+ Indoor Air Comfort GOLD for low emissions. As a universal adhesive CT1 bonds to all metals.
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Catnic (Tata Steel UK)
ANG single leaf angle lintel for solid wall construction, outer leaf 100-102 mm, no cavity. SWL total UDL on 150 mm end bearings: 4 kN at 900-1200 mm, 5 kN at 1350-1500 mm, 7 kN at 1650-2100 mm, 10 kN at 2250-2400 mm, 15 kN from 2550 mm to 3900 mm. Nominal height steps 88 mm, 131 mm, 167 mm, 215 mm and 213 mm. Weight 2.42 kg at 900 mm to 36.5 kg at 3900 mm. Lengths 900-2400 mm are supplied galvanised; 2550-3900 mm come in black duplex coating as standard.
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Catnic (Tata Steel UK)
BHD140 heavy duty closed box lintel for internal load bearing walls of 140 mm. SWL total UDL: 29 kN from 1050 mm to 1500 mm, 39 kN from 1650 mm to 2700 mm, 51 kN from 2850 mm to 3300 mm. Nominal height 143 mm up to 2100 mm then 219 mm. Weight 9.08 kg at 1050 mm to 53.39 kg at 3300 mm. Suits direct floor or roof load, concrete floor and point loads.
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Catnic (Tata Steel UK)
BSD100 closed box lintel for internal load bearing walls of 100 mm, universal application covering direct floor or roof load, concrete floor and point loads. SWL total UDL: 19 kN from 750 mm to 2100 mm, 20 kN from 2250 mm to 2700 mm, 29 kN at 2850 mm. Nominal height 143 mm to 2700 mm, then 219 mm. Weight 4.48 kg at 750 mm to 35.34 kg at 2850 mm. Galvanised steel with black powder coating.
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Catnic (Tata Steel UK)
CBP150/100 extreme load cavity lintel for a 150-165 mm cavity, inner leaf 100 mm, outer leaf 100-102 mm. Non insulated, structural steel, hot dip galvanised after fabrication. SWL total UDL at a 1:1/3:1 ratio on 150 mm end bearings: 88 kN at 2100 to 2700 mm, 79 kN at 3300 to 3900 mm, 70 kN at 5400 mm and 63 kN at 5750 mm. Constant nominal height 263 mm. Weight 86.94 kg at 2100 mm to 238.05 kg at 5750 mm, which is a two-man or mechanical lift. Lengths in 150 mm increments up to 3000 mm then 300 mm increments. Made in the UK, BES 6001 certified.
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Catnic (Tata Steel UK)
CCB standard duty semi circle arch lintel for domestic housing with nominal loadings, giving clear spans from 600 mm to 1200 mm. Cavity 90-100 mm, inner leaf 100-102 mm, outer leaf 100-102 mm. Stocked at clear spans of 600, 630, 900, 915 and 1200 mm with weights of 12.69, 13.47, 18.14, 18.40 and 23.43 kg. Catnic list no SWL figure for the arch range, which is quoted N/A, so loadings must be referred to their technical department. Hot dip galvanised, made in the UK, BES 6001 certified.
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Catnic (Tata Steel UK)
CG90/100 open back cavity wall lintel for 90-105 mm cavity, inner leaf 100-115 mm, outer leaf 100-102 mm, standard duty. Safe working load is total UDL at a 1:1/3:1 inner-to-outer load ratio on 150 mm end bearings: 15 kN for 750-1500 mm lengths, 18 kN at 1650-1800 mm, 20 kN at 1950-2100 mm, 22 kN at 2250-2400 mm, 26 kN from 2550 mm to 3000 mm. Nominal height steps 90 mm (to 1500), 136 mm (to 2100), 175 mm (to 2400), 215 mm (to 2700) then 224 mm. Weight 4.59 kg at 750 mm rising to 39.45 kg at 3000 mm. Lengths in 150 mm increments. Galvanised steel, integral insulation, integral plaster key, black powder coating giving duplex corrosion protection.
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Catnic (Tata Steel UK)
CGE90/100 closed eaves lintel, cavity 90-125 mm, inner leaf 100-115 mm, no outer leaf, standard duty. SWL total UDL on 150 mm end bearings: 20 kN from 750 mm to 1500 mm, 22 kN at 1650-2100 mm, 20 kN at 2400 mm and 2700 mm. Nominal height 97 mm to 1500 mm, 117 mm to 2100 mm, 118 mm above. Weight 4.96 kg at 750 mm to 28.51 kg at 2700 mm. Lengths in 150 mm increments to 1800 mm then 300 mm increments to 2700 mm.
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Catnic (Tata Steel UK)
CH90/100 heavy duty open back cavity lintel, cavity 90-105 mm, inner leaf 100-115 mm, outer leaf 100-102 mm. SWL is total UDL at a 1:1/19:1 ratio on 150 mm end bearings: 32 kN from 900 mm to 1800 mm, 48 kN at 1950 mm and 2100 mm, 45 kN at 2250 mm and 2400 mm. Constant nominal height 158 mm. Weight 10.12 kg at 900 mm to 33.72 kg at 2400 mm. Lengths in 150 mm increments up to 2400 mm. Datasheet warns that with the CH and CX open back ranges carrying concrete floors the blockwork must be built tight to the inner vertical face with a mortar joint on top so floor units spread evenly over the inner flange.
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Catnic (Tata Steel UK)
CN100 light duty internal wall lintel for 100 mm load bearing walls, no cavity. SWL total UDL on 150 mm end bearings is 10 kN at both stocked lengths 1050 mm and 1200 mm, nominal height 50 mm, weight 3.91 kg and 4.46 kg. Lengths in 150 mm increments. Galvanised steel with integral plaster key and integral insulation, certified to BES 6001 responsible sourcing, made in the UK.
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Catnic (Tata Steel UK)
CTF9 single element lintel for timber frame construction with a brick or block outer leaf 100-102 mm and cavity 90-105 mm, detailed to allow vertical differential movement of the timber frame. SWL total UDL: 5 kN from 750 mm to 1500 mm, 7 kN from 1650 mm to 2400 mm, 9 kN from 2550 mm to 3000 mm. Nominal height 146 mm to 1800 mm, 201 mm to 2400 mm, 271 mm to 3000 mm. Weight 2.83 kg at 750 mm to 23.25 kg at 3000 mm. Built-in DPC via the black powder coating.
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Catnic (Tata Steel UK)
CX150/125 extra heavy duty open back lintel for a 150-165 mm cavity, inner leaf 125-140 mm, outer leaf 100-102 mm, which is the wide-cavity build used to reach modern U-values. SWL total UDL at a 1:1/19:1 ratio: 60 kN from 900 mm through 2100 mm. Nominal height a constant 232 mm. Weight 16.65 kg at 900 mm rising to 38.85 kg at 2100 mm, noticeably heavier than the equivalent 90 mm cavity CX90/100 at the same length.
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Catnic (Tata Steel UK)
CX90/100 extra heavy duty open back cavity lintel, cavity 90-105 mm, inner leaf 100-115 mm, outer leaf 100-102 mm. SWL total UDL at 1:1/19:1 on 150 mm end bearings: 60 kN from 900 mm through 2700 mm, 55 kN at 2850 mm and 3000 mm, 50 kN at 3300 mm and 3600 mm. Constant nominal height 232 mm. Weight 15.24 kg at 900 mm to 73.62 kg at 3600 mm.
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Catnic (Tata Steel UK)
CXL290 extreme load cavity lintel, cavity 90-105 mm, non-insulated, structural steel post-galvanised. SWL total UDL at a 5:1/19:1 ratio on 200 mm end bearings: 88 kN from 2100 mm to 3000 mm, 83 kN from 3300 mm to 4800 mm, 78 kN at 5100 mm, 71 kN at 5400 mm, 64 kN at 5700 mm, 56 kN at 6000 mm, 52 kN at 6300 mm and 47 kN at 6600 mm. Constant nominal height 212 mm. Weight 91 kg at 2100 mm rising to 287 kg at 6600 mm. Lengths in 150 mm increments to 3000 mm, then 300 mm increments.
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Catnic (Tata Steel UK)
TH90/100 heavy duty cavity lintel with a full thermal break, cavity 90-105 mm, inner leaf 100-115 mm, outer leaf 100-102 mm. The thermally broken TH and TX ranges cover cavities 90-205 mm in standard, heavy and extra heavy duty. SWL total UDL at 1:1/19:1 on 150 mm end bearings: 32 kN from 750 mm to 1800 mm, 48 kN at 1950 mm and 2100 mm, 45 kN at 2250 mm and 2400 mm. Nominal height 154 mm to 1800 mm then 229 mm. Weight 9.98 kg at 750 mm to 40.10 kg at 2400 mm.
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Cedral (Etex)
Flat fibre cement facade board, thickness 9 mm, available 2500 x 200 mm, 2500 x 300 mm, 2500 x 400 mm, 2500 x 1220 mm and 3050 x 1220 mm. Weight ranges from 6.5 to 47.4 kg per board depending on size. Fire safety classification A2-s1, d0 to EN 13501-1:2018. CCPI assessed.
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Cedral (Etex)
Fibre cement cladding board with a concealed click fixing. Length 3600 mm, width 186 mm, thickness 12 mm, weight 12.20 kg per siding, 1.60 sidings per m2 of facade. Fire safety classification A2-s1, d0 to EN 13501-1:2018. Can be placed horizontally or vertically, needs no painting, CCPI assessed.
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Cedral (Etex)
Fibre cement weatherboard. Length 3600 mm, width 190 mm, thickness 10 mm, weight 11.20 kg per siding, 1.74 sidings per m2 of facade. Fire safety classification A2-s1, d0 to EN 13501-1:2018. Available in 22 colours with woodgrain or smooth finish, can be fitted horizontally or vertically, CCPI assessed. Covered by Cedral BBA certificates.
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Delta Membrane Systems
HDPE cavity drain membrane. Stud height 20 mm, sheet thickness 1 mm, roll size 2.0 m x 20 m. Compressive strength 150 kN/m2. Drainage capacity 10 litres per second per metre, equal to 600 litres/min/m or 36,100 litres/hour/m, and 1.25 litres/second/m2. Air volume between studs 14 litres/m2. R value 0.18 m2K/W. Temperature resistance -30 C to +80 C. Reaction to fire Class E to EN 13501-1. The 20 mm stud gives roughly four times the drainage rate of the 8 mm product at the cost of depth taken off the room.
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Delta Membrane Systems
HDPE cavity drain membrane with DELTASAFE additive. Stud height 8 mm, sheet thickness 0.5 mm, roll size 2.4 m x 20 m. Compressive strength greater than 250 kN/m2. Drainage capacity 2.25 litres per second per metre, equal to 135 litres/min/m or 8,100 litres/hour/m. Air volume between studs 5.3 litres/m2. R value 0.12 m2K/W. Temperature resistance -30 C to +80 C. Reaction to fire EN 13501-1:2018 Class B-s2,d0, which is a higher fire classification than the Class E typical of plain HDPE cavity drain membranes.
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EcoTherm Insulation (Kingspan Insulation Ltd)
Full fill cavity board, thermal conductivity 0.022 W/mK, standard thicknesses 90, 115 and 140 mm, BBA Certificate No 24/7114. Published R-values and typical U-values (with a 10 mm clear residual cavity and skim coated plasterboard on dabs internally): 90 mm R 4.05, U 0.18 brick and light block, 0.19 brick and medium block, 0.20 brick and dense block; 115 mm R 5.20, U 0.15 to 0.16; 140 mm R 6.35, U 0.13 to 0.14 W/m2K. Calculations use lambda values brick 0.77, dense block 1.13, medium block 0.51, lightweight block 0.11 W/mK. Fire: Eco-Cavity Full Fill has a Euroclass rating of F.
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EcoTherm Insulation (Kingspan Insulation Ltd)
Partial fill cavity board, thermal conductivity 0.022 W/mK, declared compressive stress 120 kPa at 10% compression, thicknesses 50 to 100 mm, BBA Certificate No 24/7114. Published R-values and typical wall U-values with a 50 mm residual cavity: 50 mm board R 2.25, U 0.28 brick and dense block down to 0.24 light block and dense block; 60 mm R 2.70, U 0.25 to 0.21; 70 mm R 3.15, U 0.22 to 0.19; 75 mm R 3.40, U 0.21 to 0.19; 80 mm R 3.60, U 0.20 to 0.18; 100 mm R 4.50, U 0.17 to 0.15 W/m2K. Fire: Eco-Cavity has a Euroclass rating of F.
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EcoTherm Insulation (Kingspan Insulation Ltd)
General purpose foil faced rigid PIR board to BS EN 13165: 2012 + A2: 2016. Thermal conductivity 0.022 W/mK. Declared compressive stress 120 kPa at 10% compression to BS EN 826. Manufactured range 25 to 150 mm, covered by BBA Certificate No 24/7114, made at Pembridge and Selby. Published R-values (m2K/W) with board weights: 25 mm 1.10 (3.38 kg), 30 mm 1.35, 40 mm 1.80, 50 mm 2.25 (5.62 kg), 60 mm 2.70, 70 mm 3.15, 75 mm 3.40, 80 mm 3.60, 90 mm 4.05, 100 mm 4.50 (10.08 kg), 110 mm 5.00, 120 mm 5.45, 125 mm 5.65, 130 mm 5.90, 140 mm 6.35, 150 mm 6.80 (14.54 kg). Maximum board span 600 mm when fixed to timber framing, metal channels, rafters or battens. Fire: Eco-Versal has a Euroclass rating of F.
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fermacell (James Hardie Europe)
Manufacturer technical properties for fermacell gypsum fibreboard, a homogeneous gypsum and recycled paper fibre board with no separate paper liner. Thicknesses are 10, 12.5, 15 and 18mm weighing 11.5, 14.5, 17.5 and 21 kg/m2, so 12.5mm fermacell at 14.5 kg/m2 is nearly twice the 8.0 kg/m2 of standard 12.5mm plasterboard. Density is 1150 plus or minus 50 kg/m3. Thermal conductivity (lambda) is 0.32 W/mK. Expansion or contraction from a 30 per cent change in relative humidity at 20C is 0.25 mm per metre, the figure that governs joint detailing on long runs. Reaction to fire is classified to DIN EN 13501-1 and thickness swelling after 24 hours soaking in water is quoted, which is why it is used in wet areas and on floors. The high density is the reason it holds direct fixings and resists impact where plasterboard would not.
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fischer
High performance styrene free hybrid injection mortar in a shuttle cartridge, grey. Temperature resistance 120 C, UV resistant, water resistant with water absorption of 0.8% after 14 days, unaffected by a 1% tenside cleaning solution, and approved for outside use for freeze-thaw resistance under EOTA part 5. Shrinkage less than 0.9%. Shore A hardness 83 after 45 minutes. Density 1.6-1.8 g/cm3. Thermal conductivity 0.73 W/mK. Contact resistance 1.8 x 10^12 ohm cm. Viscosity at 20 C 110-150 Pas (Brookfield Sp.7 at 10 rpm). Open time at 10-20 C is 5 minutes and curing time at 10-20 C is 60 minutes. Shelf life 18 months. Cartridge temperature must be at least +5 C at installation.
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Forterra
Thermalite Hi-Strength 7 Trenchblock, tongue and groove with integrated hand holds. Compressive strength 7.3 N/mm2, lambda below ground 0.29 W/mK, dry density 730 kg/m3, face dimensions 440 x 215 mm and 440 x 140 mm. Classified DS1-4 for resistance to ground contamination, so usable across a wide range of ground conditions. All 140 mm high trenchblocks are supplied flat-ended, without hand holds or tongue and groove. Manufactured to BS EN 771-4.
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Forterra
Thermalite Trenchblock 3.6 tongue and groove for below-ground construction. Compressive strength 3.6 N/mm2, lambda below ground 0.24 W/mK, dry density 600 kg/m3, height 215 mm, length 440 mm, widths 255 mm and 300 mm. Note the below-ground lambda is quoted separately from the 0.15 W/mK design value used above DPC for the equivalent 3.6 N/mm2 block.
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Forterra
Thermalite Turbo Block 2.9. Compressive strength 2.9 N/mm2, design lambda 0.11 W/mK, dry density 470 kg/m3, face size 440 x 215 mm. Widths and weights: 100 mm 6.1 kg, 140 mm 8.5 kg, 150 mm 9.1 kg, 190 mm 11.5 kg, 200 mm 12.1 kg, 215 mm 13 kg. Weights based on block gross density plus 50 kg/m3 at a typical as-received moisture content of 23%. This is the lowest lambda block in the standard Thermalite wall range.
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Forterra (Ecostock)
Ardleigh Yellow Stock, an Ecostock soft mud brick from the Measham factory. Manufactured to BS EN 771-1. Dimensions 215 x 102.5 x 65 mm. Compressive strength 30 N/mm2, configuration frogged with 2-12% voids, dry weight 2.36 kg. Durability rating F2, active soluble salts S2, water absorption 13%. Thermal conductivity lambda 10,dry 0.54 W/mK, and 0.9 W/mK exposed at 5%. Dimensional tolerance mean T2, range R1. Texture stock thrown.
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Glidevale Protect (Building Product Design Ltd)
Vapour permeable wall membrane to BS EN 13859-2:2010, weight 100 g/m2 to BS EN 1849-2. Roll sizes 0.54 m x 100 m (54 m2, 5.4 kg) and 1.35 m x 100 m (135 m2, 14 kg). Water vapour resistance to BS EN ISO 12572 0.03 MNs/g, 0.005 Sd. Resistance to water penetration to BS EN 13111 Pass, Class W2, no leakage aged. Nail tear strength to BS EN 12310-1 modified MD 230 N, CD 245 N. Unaged tensile strength to BS EN 12311-1 modified MD 220, CD 225 N/50 mm; aged MD 185, CD 187 N/50 mm. Flexibility at low temperature to BS EN 1109 -40 C. Ageing conditions: UVA lamps at 50 C for 336 hours then heat ageing at 70 C for 90 days.
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Glidevale Protect (Building Product Design Ltd)
Declaration of Performance for Protect TF200 vapour permeable wall underlay, AVCP System 3, tested by notified laboratory 1301 TSUS Bratislava to EN 13859-1 & 2: 2010/2014. Weight 100 (-4) gsm. Water resistance unaged W2, aged W2. Tensile strength unaged MD 225 (-35) N/50 mm, CD 200 (-35) N/50 mm; aged MD 150 (-40), CD 180 (-30). Elongation unaged 80 (+20)% both directions, aged 40 (-10)%. Tear resistance 130 (-50) N both directions. Flexibility at low temperature -40 C. Water vapour resistance unaged less than or equal to 0.02 MNs/g, less than or equal to 0.003 sd (m). Resistance to water penetration greater than 25 cm to EN ISO 20811. Reaction to Fire: NPD, Class F.
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H+H UK
Celcon Foundation Blocks for below ground work. Two strengths, 3.6 N/mm2 and 7.3 N/mm2, at densities 600 kg/m3 and 730 kg/m3. Thermal conductivity below ground is quoted separately as 0.24 W/mK and 0.29 W/mK, and H+H note explicitly that these figures differ from the above-DPC values because moisture content below ground is higher. A single foundation block replaces two skins of blockwork below DPC.
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H+H UK
Celcon Jumbo Bloks, code SK. Available at compressive strengths 2.9, 3.6, 7.3 and 9.7 N/mm2 with thermal conductivities 0.11, 0.15 and 0.18 W/mK, density from 460 kg/m3. The 9.7 N/mm2 option is the highest strength in the Celcon aircrete range.