Steel & Structural Timber
182 sources in the library on steel & structural timber. 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 4 of 5.
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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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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 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)
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 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.
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H+H UK
Celcon Plus Blocks, the large format thin-joint range. Available at compressive strengths 2.9, 3.6, 7.3 and 8.7 N/mm2 with matching thermal conductivities 0.11, 0.15 and 0.18 W/mK, from a density of 400 kg/m3. Laid with Celfix thin layer mortar rather than a conventional 10 mm bed.
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Helifix (Leviat)
BowTie is a long stainless steel tie that stabilises bulging walls by securing them into the ends of internal floor joists, with no external pattress plates. The BowTie HD is a heavy duty 12 mm diameter threaded bar with a self-cutting end, used where the wall must be tied back to internal floor joists or roof beams running parallel to it. Self-tapping so timbers do not split, suitable for hardwood, and installed from outside. Kit components: clearance-hole drill bit, BowTies, power support tool, HD Driver, hand support tool, and PolyPlus resin cartridge with extension nozzles and applicator.
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Helifix (Leviat)
Kit contents: 10 x 1 m lengths of 6 mm HeliBar, one 3 litre tub of HeliBond cementitious grout, mortar chisel and rake, mixing paddle, and an applicator with nozzle. A 3-jaw-chuck power drill is needed but not supplied. Dimensions that matter: slots are cut into the horizontal mortar beds a minimum of 500 mm either side of the crack, and are 10 mm wide as standard to take the 6 mm HeliBar, with 4.5 mm HeliBar used for thin joints. Where two or more cracks are close together one continuous bar is used, long enough to extend 500 mm beyond the outer cracks, so three cracks at 250 mm apart need a 1.5 m bar. Slots are prepared with HeliPrimer WB or thoroughly wetted, HeliBond is the recommended bonding agent, and PolyPlus resin is used for small jobs or where load is applied quickly. Suitable for listed and historic structures and lime mortar.
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Helifix (Leviat)
HeliBar is austenitic stainless steel helical reinforcing bar. It starts as round wire with a typical 0.2% proof stress of 500 N/mm2; the cold forming process that creates the helical hi-fin profile more than doubles that to around 1100 N/mm2. Bars are bonded into cut slots with HeliBond thixotropic cementitious grout, the composite action being the basis of the Helibeam System. Short 1 m lengths are used singly for crack stitching; longer lengths are used in pairs to form masonry beams that redistribute loads from foundation movement, and to create or reinstate failed lintels. Using 400 mm bars bonded at one end only, with the free end in a bonded sleeve, forms a movement joint. Applications listed include crack stitching, lintel repair, deep masonry beams, horizontal restraint with BowTie, reconnecting separated walls, securing parapets and supporting masonry over new openings.
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Ibstock
Ibstock code A0270A, Aldridge Multi Rustic, wirecut extruded with a rusticated face, made at Aldridge. Dimensions 215 x 102 x 65 mm, size tolerance T2 R1, vertically perforated with 27-32% voids. Compressive strength 25 N/mm2, active soluble salts S2, water absorption 12% by weight, durability F2. Gross dry density 1470 kg/m3, equivalent thermal conductivity K value at 5% exposed 1.09 W/mK, initial rate of absorption (suction rate) 0.7 kg/m2/min. Dry brick weight 2 kg, pack quantity 500.
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Ibstock
Ibstock code A4057A, Ashdown Medium Multi. Dimensions 215 x 102 x 65 mm, size tolerance T1 R1, single frog with 10-15% voids. Compressive strength 30 N/mm2, active soluble salts S2, water absorption 15% by weight, durability F2. Gross dry density 1610 kg/m3, equivalent thermal conductivity K value at 5% exposed 0.86 W/mK, initial rate of absorption 1.9 kg/m2/min, which is high enough that the brick will need wetting or a water-retentive mortar in warm weather.
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Ibstock
Ibstock code A0129A, Aston Burnt Red. Dimensions 215 x 102 x 65 mm, tolerance T2 R1, vertically perforated with 33-38% voids, the highest void ratio of the Ibstock bricks listed here. Compressive strength 25 N/mm2, active soluble salts S2, water absorption 12%, durability F2. Gross dry density 1600 kg/m3, equivalent thermal conductivity K value at 5% exposed 1.16 W/mK, initial rate of absorption 0.3 kg/m2/min.
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Ibstock
Ibstock code A2601A, Beamish Blend. Dimensions 215 x 102 x 65 mm, tolerance Tm Rm, solid with 0% voids. Compressive strength 20 N/mm2, active soluble salts S2, water absorption 12% by weight, durability F2. Gross dry density 1740 kg/m3, equivalent thermal conductivity K value at 5% exposed 0.86 W/mK, initial rate of absorption 0.6 kg/m2/min. A solid, no-void brick, which matters where the brick is cut or exposed on edge.
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IG Lintels (Keystone Group)
HDBOX 100, SKU HDBOX/K100, heavy duty closed box lintel used to support openings in 100 mm wide internal walls, wall depth 100-140 mm. Total UDL by length: 600-1200 mm, 150 mm high, 2.5 mm steel, 50 kN; 1350-1800 mm, 150 mm high, 2.5 mm, 45 kN; 1950-2400 mm, 215 mm high, 2.5 mm, 50 kN; 2550-2700 mm, 215 mm high, 2.5 mm, 40 kN. Sister sizes HDBOX 140 and HDBOX 200 cover wider walls.
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IG Lintels (Keystone Group)
HDBOX 140, SKU HDBOX/K150, heavy duty closed box lintel used to support openings in 150 mm wide walls, wall depth 100-140 mm. Total UDL by length: 600-1200 mm, 150 mm high, 2.5 mm steel, 50 kN; 1350-1800 mm, 150 mm high, 45 kN; 1950-2400 mm, 215 mm high, 50 kN; 2550-2700 mm, 215 mm high, 40 kN.
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IG Lintels (Keystone Group)
HT/HD+ 100 Hi-therm heavy duty thermally broken lintel for 90-105 mm cavities. Total UDL at 3:1 and 19:1 load ratios by length band: 600-1500 mm, 144 mm high, 2.9 mm steel, 30 kN and 22 kN; 1650-2400 mm, 226 mm high, 2.9 mm, 35 kN and 35 kN; 2550-3000 mm, 226 mm high, 3.2 mm, 35 kN and 35 kN; 3150-3600 mm, 215 mm high, 2.9 mm, 35 kN and 32 kN.
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IG Lintels (Keystone Group)
INT 100, SKU INT/K-100, light internal lintel for solid walls. Overall length 900 mm gives a 700 mm maximum span at 7 kN total UDL; 1050 mm gives 850 mm at 7 kN; 1100 mm gives 900 mm at 7 kN; 1200 mm gives 1000 mm at 7 kN. IG state that one course of mortar must be allowed to cure for at least 24 hours before additional loads are applied, and that INT 100 is not suitable for floor loads. Specify INT 64 for a 75 mm solid wall.
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IG Lintels (Keystone Group)
L1/HD 100 heavy duty lintel for 90-105 mm cavities, 102 mm outer leaf, 100 mm inner leaf. Total UDL by length band, quoted at 3:1 and 19:1 inner-to-outer load ratios: 600-1200 mm, 109 mm high, 2.9 mm steel, 30 kN and 22 kN; 1350-1500 mm, 136 mm high, 2.9 mm, 30 kN and 22 kN; 1650-2100 mm, 161 mm high, 2.9 mm, 40 kN and 35 kN; 2250-2550 mm, 199 mm high, 2.9 mm, 40 kN and 35 kN; 2700-3000 mm, 199 mm high, 3.2 mm, 40 kN and 35 kN.
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IG Lintels (Keystone Group)
L1/S 100 standard load lintel for 90-105 mm cavities, 102 mm outer leaf, 100 mm inner leaf. Loading table by manufactured length: 600-1200 mm, 87 mm high, 1.6 mm steel, total UDL 12 kN at a 3:1 load ratio and 10 kN at 19:1; 1350-1500 mm, 87 mm high, 1.8 mm steel, 16 kN and 13 kN; 1650-1800 mm, 107 mm high, and so on up the range. Lengths are made in 150 mm increments.
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IG Lintels (Keystone Group)
L1/S 50, SKU SK50, standard load lintel for the narrow 50-65 mm cavities common in older housing, 102 mm outer leaf, 100 mm inner leaf. Loading table by manufactured length: 600-1200 mm, 79 mm high, 1.6 mm steel, total UDL 12 kN at a 3:1 load ratio and 10 kN at 19:1; 1350-1500 mm, 96 mm high, 1.8 mm steel, 14 kN and 12 kN; the range continues from 1650-1800 mm upward. Made in 150 mm length increments.
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IG Lintels (Keystone Group)
L1/XHD 100 extra heavy duty lintel for 90-105 mm cavities, 102 mm outer leaf, 100 mm inner leaf. Total UDL at 3:1 and 19:1: 600-1500 mm, 162 mm high, 3.2 mm steel, 50 kN and 45 kN; 1650-1800 mm, 162 mm high, 3.2 mm, 50 kN and 45 kN; 1950-2100 mm, 199 mm high, 3.2 mm, 55 kN and 45 kN; 2250-2700 mm, 199 mm high, 3.2 mm, 50 kN. Made in 150 mm length increments.
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IG Lintels (Keystone Group)
L9 solid wall lintel, SKU SW/K. Total UDL by length band: 600-1200 mm, 58 mm high, 2.5 mm steel, 6 kN; 1350-1650 mm, 93 mm high, 2.5 mm, 8 kN; 1800-2100 mm, 94 mm high, 2.9 mm, 8 kN; 2250-2700 mm, 117 mm high, 3.0 mm, 10 kN. IG state the lintel must be built in as shown to achieve the loading figures, and that lintels may be propped to speed construction.
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IG Lintels (Keystone Group)
The full IG load-table book, CI/SfB Hh2 (31.9). Lintels are designed to BS 5977 Part 2 1983 and BS EN 845-2:2003, tabulated at both a 3:1 and a 19:1 inner-to-outer load ratio. L1/S 100 for 90-105 mm cavities: height 88 mm and 1.6 mm steel at 600-1200 mm giving 12 kN at 3:1 and 10 kN at 19:1, rising through 107 mm/19 kN, 125 mm/21 kN, 150 mm/23 kN, 162 mm/27 kN to 200 mm high 3.4 mm steel at 4200-4800 mm giving 27 kN and 22 kN. L1/S 110, 130 and 150 for 110-125, 130-145 and 150-165 mm cavities all run 16/22/24/27/26/25 kN at 3:1. L1/HD 100 gives 30 kN to 1500 mm and 40 kN from 1650 to 3000 mm. INT 100 solid wall lintel: 900 mm overall for a 700 mm maximum span at 7 kN, up to 1200 mm overall for a 1000 mm span at 7 kN, not suitable for floor loads. L9/SW 100 for 100-150 mm solid walls gives 6 to 10 kN. The insulation is expanded polystyrene at 0.03 W/mK, CFC and formaldehyde free. A damp proof course is required over all lintels.
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James Jones & Sons
Site rules for erecting JJI-Joists. Solid timber stability blocks must be a minimum 38 x 125 mm, cut squarely to maintain joist spacing and fastened with a minimum of two 3.35 x 65 mm nails; blocks must be fixed to at least three joists and cover a minimum distance of 1200 mm. Temporary bracing uses 22 x 97 mm continuous longitudinal binders and 22 x 97 mm diagonal braces, with the bracing system at one end of the joist run. Joists must be erected straight and vertical, with maximum deviation from horizontal of 10 mm and from vertical of 2 mm. Loading limit during erection: the weight of material placed on a single joist must not exceed 250 kg, reduced to 200 kg for 195 mm deep joists, and timber bearers are recommended to spread the load. A minimum of 675 mm of cured masonry is required before loading. The guide also sets out the conditions that are not permitted and the service hole rules.
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James Jones & Sons
The full JJI-Joist design manual. A JJI-Joist is softwood flanges with a 9 mm OSB/3 web. Four flange widths: A+ 47 mm, B+ 63 mm, C 72 mm, D 97 mm. Standard depths 195, 220, 235, 240, 245, 300, 350, 400 and 450 mm, though 195 mm is A+ only and 350-450 mm are D flange only. Section properties, for example JJI 195 A+: bending moment capacity 5.67 kNm, bending stiffness EI 305.1 x 10^9 Nmm2, shear capacity 10.64 kN, shear stiffness GA 1.234 x 10^6 N, end bearing capacity 8.50 kN on a minimum 45 mm bearing. JJI 245 A+ gives 7.54 kNm and EI 518.0; JJI 300 D gives 17.22 kNm and EI 1899.0 with a 45 mm end bearing capacity of 17.54 kN. Maximum service hole diameters are 75.0 mm in 195 and 220 mm joists, 64.0 mm at 245 mm and 32.0 mm at 400 mm outside the hole charts. Also carries acoustic floor build-ups, fire design charring guidance and thermal performance data.
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Keystone Lintels
HT/S+ standard load Hi-therm+ lintel tables. HT/S+ 100 for 90-105 mm cavities, made in 150 mm length increments, total UDL quoted at 3:1 and 19:1 inner-to-outer ratios: 600-1200 mm, 100 mm high, 1.6 mm steel, 12 kN and 10 kN; 1350-1500 mm, 107 mm, 2.0 mm, 16 and 13; 1650-1800 mm, 150 mm, 2.0 mm, 19 and 16; 1950-2100 mm, 150 mm, 2.0/2.5 mm, 21 and 17; 2250-2400 mm, 175 mm, 23 and 18; 2550-2700 mm, 190 mm, 2.5 mm, 27 and 22; 2850-3000 mm, 190 mm, 27 and 20; 3150-3600 mm, 234 mm, 2.9 mm, 27 and 20; 3750-4200 mm, 234 mm, 3.2 mm, 27 and 22. HT/S+ 110 and wider cavities follow on the same page.
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Kingspan Insulation
Rock mineral fibre slab with a thermal conductivity of 0.036 W/mK and a density of 28 to 32 kg/m3. Slab size 1.22 m x 0.61 m, so 610 mm wide slabs friction fit between studs at 600 mm centres. Fire: under System 1 AVCP, K-Roc Framing Slab achieves European Classification (Euroclass) A1 when classified to EN 13501-1: 2018. Supporting fire resistance test reports to BS EN 1364-1: 2015 and a BS EN 13501-2: 2016 classification report are listed.
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Kingspan Insulation
Phenolic framing board, 2400 x 1200 mm, thermal conductivity 0.019 W/mK. Declared compressive strength 100 kPa to BS EN 826: 2013. BBA Certificate covers thicknesses 25 to 150 mm. Published R-values (m2K/W): 25 mm 1.30, 40 mm 2.10, 50 mm 2.60, 60 mm 3.15, 70 mm 3.65, 75 mm 3.90, 80 mm 4.20, 90 mm 4.70, 100 mm 5.25, 110 mm 5.75, 120 mm 6.30, 130 mm 6.80, 140 mm 7.35, 150 mm 7.85. Fire: under System 4 AVCP, K112 has a Euroclass rating of F. A tested wall build-up of 32.5 mm K118 on 89 x 38 mm studs at 600 mm centres with 50 mm K112, 9 mm OSB and nilvent membrane achieved 41 minutes integrity, insulation and loadbearing capacity under EN 13501-2: 2016 (report EUI-21-000441, 8 February 2022).
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Kingspan Insulation
Fibre-free rigid thermoset polyisocyanurate (PIR) board for timber and steel framing to BS EN 13165: 2012 + A2: 2016, low emissivity composite foil both faces. Declared compressive stress 120 kPa at 10% compression to BS EN 826. Water vapour resistance to BS EN 12086 greater than 50 MNs/g for the insulation core and greater than 100 MNs/g for the composite foil facing (Pembridge and Selby production). Published R-values (m2K/W): 25 mm 1.10, 30 mm 1.35, 40 mm 1.80, 50 mm 2.25, 60 mm 2.70, 70 mm 3.15, 75 mm 3.40, 80 mm 3.60, 90 mm 4.05, 100 mm 4.50, 110 mm 5.00, 120 mm 5.45, 125 mm 5.65, 130 mm 5.90, 140 mm 6.35, 150 mm 6.80, which correspond to a 0.022 W/mK lambda. Fire: under System 4 AVCP, TW55 has a Euroclass rating of F.
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Knauf Insulation
Glass mineral wool roll for timber frame between studwork, ECOSE Technology binder. Declared thermal conductivity 0.032 W/(mK), the best in the FrameTherm range. Reaction to fire A1 to EN 13501-1. Supplied 90 mm x 1140 mm x 4500 mm giving R 2.80 (m2K)/W and 5.13 m2 per roll, and 140 mm x 1140 mm x 2800 mm giving R 4.35 (m2K)/W and 3.19 m2 per roll. Rolls are ready-cut into 2 x 570 mm or 3 x 380 mm widths to friction fit between studs.
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Lignacite
Product data updated 8 January 2026. Expanded clay aggregate block. Face size 440 x 215 mm, thickness 100 mm and 140 mm, mean unit strength 3.6 N/mm2, Group 1 solid, tolerance Category D1. Net dry density 850 kg/m3. Thermal conductivity 0.27 W/mK at 3% moisture, internal use. Reaction to fire Class A1, moisture movement 0.6 mm/m, frost resistance to PD 6697 Table 15. BS EN 771-3, BSI Kitemarked, Category 1. Lignacite direct that a 7.3 N/mm2 block such as Lignacrete Standard is used below ground rather than Fibo 850, and note the low self weight suits partitions built off a floor slab.
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Lignacite
Product data updated 5 June 2026. Fine textured block available paint grade or fair face. Face size 440 x 215 mm, thickness 100 mm and 140 mm, mean unit strength 3.6, 7.3 and 10.4 N/mm2, Group 1 solid, tolerance Category D1. Net dry density 1570 kg/m3 for 100 mm blocks. Thermal conductivity 0.90 W/mK at 3% moisture, internal use, for 100 mm blocks. Air permeability unfinished: 3.0 m3/hr/m2 for 100 mm solid blocks and 2.8 for 140 mm SP solid blocks. The 140 mm Lignacite SP uses a modified mix to optimise density as a solid block. Lignacite recommend 210-215 mm walls be built as two leaves of 100 mm blocks laid back to back and tied.
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Lignacite
Product data updated 22 December 2025. Face size 440 x 215 mm, thickness 100 mm and 140 mm. Mean unit strength 3.6, 7.3 and 10.4 N/mm2. Group 1 solid blocks, dimensional tolerance Category D1, net dry density 1450 kg/m3. Thermal conductivity 0.47 W/mK at 3% moisture (internal use) and 0.51 W/mK at 5% moisture (external use). Reaction to fire Class A1, moisture movement less than 0.5 mm/m, frost resistance to PD 6697 Table 15. BSI Kitemarked and certified to BS EN 771-3, Category 1 masonry units. Lignacite recommend 215 mm walls be built from 100 mm blocks laid flat, and that 7.3 N/mm2 blocks be used below ground where exposed to external soil. 3.6 or 7.3 N/mm2 blocks are used as beam and block infill, with the 3.6 N transverse tested.
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Lignacite
Product data updated 8 January 2026. Dense concrete block, generally 440 x 215 mm face size, with the 140 mm Midi at 290 x 215 mm. Mean unit strengths 7.3, 10.4, 17.5, 22.5 and 30 N/mm2, the widest strength range of the Lignacite ranges. Group 1 solid, tolerance Category D1. Net dry density 2000 kg/m3 for the 7.3 and 10.4 N blocks and 2100 kg/m3 for the 22.5 N and above. Thermal conductivity 1.33 W/mK at 3% moisture and 1.43 W/mK at 5%. Reaction to fire Class A1, moisture movement less than 0.6 mm/m. BS EN 771-3, BSI Kitemarked, Category 1. Used for internal and fire break walls and as beam and block floor infill.
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Lignacite
Product data updated 12 May 2026. Face size 440 x 215 mm, single thickness 190 mm, mean unit strength 7.3 N/mm2, Group 1 solid, tolerance Category D1. Net dry density 1030 kg/m3, thermal conductivity 0.37 W/mK at 3% moisture, internal use. Air permeability of a 190 mm block: 9.1 m3/hr/m2 painted on one face and 4.0 m3/hr/m2 painted on two faces. Reaction to fire Class A1 to BS EN 13501-1, moisture movement less than 0.9 mm/m, frost resistance to PD 6697 Table 15. The 190 mm thickness is offered to span further between vertical or horizontal supports than a slimmer wall.
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Marley Ltd
Marley Type A brown batten: preservative brown treated to Use Class 2. Marley states explicitly that it is NOT suitable for BS 5534 applications and that JB Red is the graded batten to use for roofing. This is the distinction that decides whether a batten is legal to tile onto, and it is not visible on site once fitted.
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Metsa Wood (Metsa Group)
Declared characteristic values for Kerto LVL Q-panel, cross-veneered LVL-C, in strength classes LVL 32 C and LVL 36 C respectively. Bending edgewise at 300 mm depth fm,0,edge,k 28.0 and 32.0 N/mm2; flatwise parallel 32.0 and 36.0; flatwise perpendicular 7.0 and 8.0. Compression parallel fc,0,k 19.0 and 26.0; perpendicular edgewise 9.0 for both; perpendicular flatwise 2.2 for both. Tension parallel ft,0,k 19.0 and 26.0 at 3,000 mm length; perpendicular edgewise 6.0 for both, which is far above the 0.8 of the all-parallel S-beam and is the point of the cross veneers. Shear edgewise fv,0,edge,k 4.5 for both, flatwise parallel 1.3, flatwise perpendicular 0.6. Modulus of elasticity parallel E0,mean 10,000 and 10,500 N/mm2, E0,k 8,300 and 8,800. Shear modulus edgewise G0,edge,mean 600 and G0,edge,k 400; flatwise parallel 80 and 120 mean. Mean density 510 kg/m3.
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Metsa Wood (Metsa Group)
Kerto LVL Q-panel has roughly 20% of its veneers oriented crosswise. Thicknesses 27-75 mm meet strength class LVL 36 C; thicknesses 21-24 mm meet LVL 32 C. Common sizes: thicknesses 27, 39, 45, 51, 57, 63 and 69 mm in panel widths 900, 1200/1250, 1800/1820 and 2400/2500 mm. Panels up to 2,500 mm wide and 20 m long. Used for roof, floor and wall panels, high slender beams and prefabricated elements.