Steel Lintel Manual - Keystone Lintels
2 017Steel Lintel Manual
Keystone produce more than just steel lintels. Our specialist product rangeis designed to meet the needs of even the most complex project.HI-THERMKeystone has redefined lintel performance with Hi-Therm,the low cost solution to reduced Carbon Emissions and improvedFabric Energy Efficiency.STANDARD LINTELSKeystone produce a wide range of standard galvanised steel lintels.All Keystone standard lintels satisfy the Thermal Performancerequirements of all UK building regulations.STAINLESS STEELKeystone’s full range of lintels is also available in stainless steel,providing the same high quality and performance featuresas our standard galvanised lintels.SPECIAL LINTELSKeystone offer a complete custom design service to ensure your projecthas the best lintel for the job. Our technical expertise is renowned forvalue engineering the optimum solution.BRICK SLIP FEATURE LINTELSKeystone Brick Slip Feature Lintels are a one piece, prefabricated unitwith factory applied brick slips. Units are manufactured bespoke to orderand can achieve even the most challenging architectural designs.MASONRY SUPPORT & WINDPOST SYSTEMSKeystone continues to set the standard for masonry support and windpostsystems for a range of building frame configurations. The innovativeKeystone Masonry Support System provides a versatile solution whenmasonry support is required.CAVITY TRAYSThe Keystone Cavity Tray presents a lightweight, simple to installand long-lasting solution to preventing dampness from penetratingbelow the roof line.
Steel Lintel ManualCONTENTSRangeServicePerformanceLintel InstallationSelecting a lintelLintel Range Index123456Hi-thermCavity wall 100mm inner leafCavity wall wide inner leafCavity wall wide outer leafEaves LintelsPorotherm LintelsPAGE245678101219293738BBA CertificationHome BuildersFederationNational BuildingSpecification ApprovedBuilders MerchantsFederationBritish StandardsInstitutionISO 9001 & ISO 14001Building ResearchEstablishmentRIBA CPDApprovedInvestors in PeopleAccreditationCompliance withEU legislation789101112Timber Frame LintelsSingle Leaf LintelsBox LintelsSolid Wall LintelsExtended RangeStainless Steel RangeSpecial Lintel sSun Lounge LintelsBrick Slip Feature LintelsMasonry Support SystemsWindpostsSignature ProjectsCavity TraysPAGE40434448505354606672747683
Keystone Lintels gives a hasslefree service from enquiry stagethrough to delivery on site.You can relax in the knowledgethat your order is in the handsof experts.Service4TECHNICAL SUPPORTDELIVERYKeystone provides comprehensive technical support for allproducts. Our free scheduling and specification service offersfast turnaround on standard lintels, masonry support andwindpost systems.Keystone’s fast, efficient delivery service is renownedthroughout the construction industry. Our logisticssolution is recognised by our customers for superiorsupply chain management.Keystone leads the market with a bespoke design service forspecial lintels and brick slip feature lintels, including onsitemeasurement and technical assistance.Our in-house experts use the latest thermal modelling softwareto advise clients on the optimum lintel solution for compliancewith and beyond the latest building regulations.Keystone continues to provide the largest range of lintelsavailable, with the shortest lead times in the industry.We have invested in large stock inventories at our twomanufacturing and distribution centres reassuring ourcustomers that all our standard lintels are instantlyavailable upon request.By contacting our engineers at an early stage of your designprocess, you will potentially gain significantly more designflexibility for the overall project. Please contact your localKeystone technical office.Keystone has revolutionised the steel lintel industry bymanufacturing and delivering ‘special’ lintels withlead-times historically associated with ex-stock items.Please refer to our Fax Back Forms for special lintelrequirements. Detailed measuring advice and Fax BackEnquiry Forms are available to download at:www.keystonelintels.com/technical.Keystone products are available through a national networkof merchant suppliers.FASTRACK DATABASE FOR CADThe Keystone Fastrack Database is accessible from theKeystone website and provides downloads of CAD filesfor a selection of Keystone Steel Lintels.
PerformanceGALVANISED STEELSTANDARD KEYSTONE LINTELKeystone’s standard range of lintels are manufacturedfrom high quality grade pre-galvanised mild steel toBS EN 10346:2009 DX51D plus Z600 or grade Z275 toBS EN10025-2:2004 with minimised spangle finish anda minimum yield stress of 250N/mm².With patented Thermal Break PlateSTAINLESS STEELNSNO UOUNILNT MACO HER LATETKPEABRPlease refer to page 53 for details.STRUCTURAL PERFORMANCEThe Keystone Lintel range has safe working loads as detailedin each applicable loading table in our Lintel Range andLoading tables, pages 11-53. The structural performancefigures within each table have been ascertained by testing inaccordance with the requirements of standards BS 5977 Part 21983 and BS EN 845-2:2003.ColdOuter LeafThermalBreak PlateWarmInner Leaf10% Contact OnlyThermal Breaki.e. no contactStandard Keystone Lintel with patentednon continuous Thermal Break PlateThe figures take into account the different loadingarrangements which are common to traditional cavitywall construction.Differential Total UDL kN 3:1Up to 75% loading on the inner leaf.5Differential Total UDL kN 19:1Up to 95% loading on the inner leaf.LINTEL LOAD TABLESColdOuter LeafThermalBreak PlateWarmInner LeafAll Keystone standard lintels satisfythe thermal performance requirementsof England and Wales’ Part L ofthe building regulations, NorthernIreland’s Part F and Scotland’sTechnical Handbook, section 6.For full details of load tables specific to your lintel type pleasesee Lintel Range & Loading Tables pages 11-53.Differential Load 3:1 ratio, 75% load on inner leaf.Differential Load 19:1 ratio, 95% load on inner leaf.Lintel types: HD/K, S/K-50 (215WIL), S/K-70 (215WIL), S/K-90(215WIL),S/K-110, S/K-130, S/K-150, SB/K, T/K, SL/K, RB/K,TJ/K, TW/K, INT/K, SW/K, IB/K, EL/K-50, EL/K-90, CFS/K,X/K have been tested as a composite unit with surroundingmasonry, built in accordance with BS EN 1996-2:2006. Thesecomposite units have been tested in accordance with therequirements of BS5977: part 2 1983 (BS EN 845-2:2003).LINTEL LIFE SPANThe Keystone lintel range complies with the technicalrequirements of the BLP (Building Life Plans) regardingthe durability data of mild steel, cold formed lintels.POLYSTYRENE INSULATIONKeystone lintels are insulated with expanded CFC freepolystyrene and conform to BS 13163: 2008.FIRE PERFORMANCEKeystone lintels have been subjected to a fire test(ref: WARRES No.101263) in accordance with BS 476:Part20: 1987, at Exova Warringtonfire and achieveda one hour fire performance.keystonelintels.com
Lintel Installation1Lintels should be installed with a minimum end bearingof 150mm, bedded on mortar and levelled along itslength and across its width.2The masonry above the lintel should be builtin accordance with BS EN 1996-2:2006.34566Raise the inner and outer leaves simultaneously to avoidexcessive eccentricity of loading, with a maximum heightdifference of 225mm (masonry should be laid on a mortarbed and all perpendicular joints should be filled).Allow the mortar to cure before applying floor or roofloads (Temporary propping beneath a steel lintel ispractised to facilitate speed of construction).The NHBC recommend a damp proof course (DPC)or cavity tray should be installed over all openings inexternal cavity walls.ENSURE LINTEL IS LEVELALONG ITS LENGTHEnsure lintel isnot damaged.Ensure anominal150mm endbearing ateach end.Ensure lintel is level along its length.150mmminimum150mmminimumEnsure lintel is fully bedded onbricklaying mortarStructural openingor clear spanLINTEL POSITION WITHINA CAVITY WALLWhen installing concrete floor units or other heavycomponents above a lintel, care should be taken toavoid shock loading and floor units should not bedragged into position. Masonry immediately abovethe lintel should be allowed to cure.INSIDEOUTSIDE789Point loads should not be applied directly onto lintelflanges. Lintels should have a minimum of 150mmmasonry between the flange and the application levelof any form of loading. Consult Keystone’s technicaldepartment if applying a point load above a lintel.The external lintel flange must project beyond thewindow/door frame and it is recommended that a flexiblesealing compound is used between the underside of thelintel flange and the frame.ABAAEnsure lintelis level acrossits width.Lintel should becentred in the cavity andthe distance betweenlintel up-stand andmasonry must notexceed 8.5mmBMasonry should notoverhang any flange bymore than 25mm.PROPPINGWhen the underside of a lintel is exposed, its appearancecan be enhanced by the addition of lintel soffit cladding.10 Do not cut lintels to length or modify them in any waywithout consulting a Keystone engineer.In accordance with BS EN1996-2:2006 and NHBCrequirements all externalwall lintels MUST beinstalled with a flexibledamp proof course withthe exception of thoseadequately protectedby an eaves overhang orsimilar form of protection.INSIDEOUTSIDETimber PlankThe practice of propping a lintelis sometimes used to facilitatespeed of construction. It shouldonly be introduced after initialmasonry load has been appliedto the lintel.When propping a lintel, ahorizontal timber plank shouldbe placed along the undersideof the lintel and suitable* propssecured into place at maximum1200mm centres.* Suitability of props isthe responsibility of sitemanagement.
Selecting the correct lintelYOU WILL NEED TO KNOW 3 THINGSWhat is the wall construction?What is the length of the lintel?What is the load to be supported by the lintel?STAGE 1 - SELECT WALL TYPETimber FrameSingle LeafSolid WallBox/K - 75EXAMPLE 1. CAVITY WALL CONSTRUCTIONYou will need to know:A Outer Leaf 102mm BrickB Cavity 100mmC Inner Leaf 100mm BlockBox/K - 100102mmOuter Leaf100mmCavity100mmInner LeafABCOUTERLEAFINNERLEAFExternalSolid WallInternal PartitionHDBox/K - 100Box/K - 150HDBox/K - 1507‘h’ nominalCavity WallSTAGE 2 - WHAT IS THE LENGTH OF THE LINTEL?EXAMPLE 2: LINTEL LENGTHHow wide is the structural opening?1 M easure the size of the structural opening i.e.the clear span between the masonry supports.Ensure a150mm endbearing ateach end.150mmminimum150mmminimumStructural openingor clear spane.g 1800mm2 Add 150mm minimum bearing to each end.Example lintel length 150 1800 150 2100mmSTAGE 3 - WHAT IS THE LOAD TO BE SUPPORTED BY THE LINTEL?EXAMPLE 3: LOAD ON LINTELkNkNkNThe load on a lintel comes from.1 Masonry2 Roof Loads: Truss/Attic/Cut/ 3 Floor Loads: Joists/Slabs/ 4 Live Loads: Residential useCommercial use/Industrial use/ 5 Combination of aboveNOTE The load ratio between outer and inner leaves of the cavity wall will need to be determined.If you are not skilled in assessing loads please contact Keystone’s Technical Team and avail of our free scheduling service.keystonelintels.com
Lintel Range IndexSECTION1CAVITYWALLHI-THERM GRP/STEEL LINTELLOADING TYPECODEStandard LoadingHT/S11Heavy Duty LoadingHT/HD11100MMLOADING TYPECODEPAGEINNER LEAFStandard LoadingS/K13Cavity Width50mm-165mmHeavy Duty LoadingHD/K14XHD/K15CFS/K16XCFS/K17Extreme LoadingX/K18LOADING TYPECODEStandard LoadingS/K WIL20Heavy Duty LoadingHD/K WIL21XHD/K WIL22CFS/K WIL23XCFS/K WIL24Extreme LoadingX/K WIL25Standard LoadingS/K 215 WIL26Heavy Duty LoadingHD/K 215 WIL27Extreme LoadingX/K 215 WIL28LOADING TYPECODEStandard LoadingS/K WOL30Heavy Duty LoadingHD/K WOL31XHD/K WOL32CFS/K WOL33XCFS/K WOL34Extreme LoadingX/K WOL35Standard LoadingS/K 215 WOL36LOADING TYPECODEPAGEStandard LoadingEL/K 9037HI-THERMGRP/STEELLINTELPsi 0.05 W/m.KCavity Width90-165mm102CavityPAGE100GALVANISED STEEL LINTEL RANGE2CAVITYWALL83102CavityExtra Heavy Duty Loading100125MM-150MMINNER LEAFCavity Width50mm-165mmCAVITYWALL102CavityExtra Heavy Duty Loading150215MMINNER LEAFCavity Width50mm-165mm1024Cavity215125MM-150MMOUTER LEAFCavity Width50mm-165mmCAVITYWALL150PAGECavityExtra Heavy Duty Loading100215MMOUTER LEAFPAGECavity Width50mm-165mm2155CAVITYWALLEAVES LINTELCavity100
SECTION67POROTHERMLOADING TYPECODEStandard LoadingSee 2 part spec38See 2 part spec39See 2 part spec39PORO THERMPAGETIMBERFRAMELOADING TYPECODEStandard LoadingT/K41VariousCavity WidthsHeavy Duty LoadingHDT/K42TIMBER FRAMEExtra Heavy Duty Loading XHDT/KPAGE40SOLID WALL89SINGLE LEAFLOADING TYPECODEPAGEStandard LoadingSB/K43Heavy Duty LoadingSL/K43LOADING TYPECODEStandard HD BOX/K-10046HD BOX/K-15046LOADING TYPEHD BOX/K-200CODE47PAGEStandard LoadingINT/K-10048SW/K-10048SOLID WALLBOX LINTELSOLID WALLHeavy Duty Loading10SOLID WALL11100MMSOLID WALL215MMSOLID WALLSTAINLESSSTEEL RANGELOADING TYPECODEPAGEStandard LoadingSW/K48Heavy LoadingIB/K-2C49Extra Heavy LoadingIB/K-3C49Extreme LoadingIBX/K49LOADING TYPECODERoller Shutter9EXTENDED LINTEL RANGEEXTENDEDLINTEL RANGEVariousCavity WidthsEXTENDEDLINTELRANGE12PAGEPAGE—50Cant Brick/Stepped Lintel —51Feature Plate—51Universal Arch Lintel—51Weep Vents & Stop Ends—52STAINLESS STEEL LINTEL RANGESTAINLESSSTEEL LINTELRANGEVariousCavity WidthsPAGEKeystone Standard Lintels are also available instainless steel. Outstanding durability throughaustenitic chromiun nickel steel BS EN10088-part 2 Astm 240 (European Grade 1.4307).Suitable for use in coastal and industrial environments.All Keystone galvanised steel loading tables apply.53keystonelintels.com
1CAVITY WALLHI-THERM LINTELRangeCavity Widths 90-165mm100mm Inner Leaf10The low costsolution to reducedcarbon emissionsand improved FabricEnergy EfficiencyKeystone leads the way with the development of a completely unique lintel range to address the thermalrequirements of new building regulations which require that lintels should be assessed for their effect on thethermal performance of a building. The thermal performance of a lintel is expressed in terms of Psi Values (Ψ)i.e. linear thermal transmittance.Psi 0.04 - 0.06 W/m.kKEY BENEFITSPCoD d*N quireRe Up to 5 times more thermally efficient than a steelcavity wall lintel. The significant reductions in thermal bridging due to theGRP component will assist in the building design processto achieve compliance with Part L and The Code forSustainable Homes.Galvanised SteelInsulation fixedin place byKeystone The use of Hi-Therm will make a significant contributionto a buildings performance in respect of the FabricEnergy Efficiency Standards (FEES).GRP Outperforms Stainless Steel on price andcorrosion resistance.Psi COMPARISON CHARTTo help understand the immense thermal benefits of theHi-Therm Lintel it must be compared to other lintel types.LINTEL TYPE COMPARISONVALUES Hi-Therm has achieved the 1 hour fire resistance test ascarried out by Exova Warringtonfire utilising the heatingconditions of BS EN 1363-1 1999.DESIGN FEATURESKeystone Hi-Therm Lintel0.04 - 0.06 W/m.K Patented GRP and Galvanised Steel hybrid design.Typical Keystone Lintel0.23 W/m.KNon-plated Steel Lintel (default)0.3 W/m.K alvanised steel is used to support the heavier loadGon the inner leaf of the cavity wall.Plated Steel Lintel (default)0.5 W/m. K rofiled CFC free insulation ensures the continuityPof insulation.THERMALPERFORMANCETESTINGTesting of Keystone’s Hi-Therm Lintel was carried out by theBRE (Building Research Establishment) using Physibel’s thermalanalysis software TRISCO which complies with BS EN ISO10211-1. The modeling follows the requirements ofthe BRE conventions document BR497.DAMP PROOFING - PROVIDE A DAMP PROOF COURSE OVER ALL LINTELS. FOR MORE GUIDANCE, PLEASE CONTACT OUR TECHNICAL TEAM
HI-THERM LINTELCavity widths from 90mm To 165mmOUTER LEAF102mmINNER LEAF100mmHT/S STANDARD LOADHT/HD HEAVY DUTY LOADBlockwork built tight against inner face of the lintel.Place mortar bed on top of blockwork before floor unitsare laid to provide even distribution of load. Lintels may bepropped to facilitate speed of construction. See LintelInstallation on page 6. Insulation fixed on top of the lintelhas been cut back on this illustration for clarity.HT/S-100 (For cavity widths 90-105mm)HT/S-110 (For cavity widths 110-125mm)11HT/S-130 (For cavity widths 130-145mm)Manufactured length 600150mm increments1500165021002250300031503600Height ‘h’144144226226Thickness2.52.92.93.2Total UDL kN 3:120212727Total UDL kN 19:117172020‘h’ nominalStandard LoadHT/S-150 (For cavity widths 150-165mm)9588100NOTE The exact lintel profile will vary dependent on lintel length and loadingHT/HD-100 (For cavity widths 90-105mm)HT/HD-110 (For cavity widths 110-125mm)HT/HD-130 (For cavity widths 130-145mm)Manufactured length 600150mm increments1500165024002550300031503600Height ‘h’144226226215Thickness2.92.93.22.9Total UDL kN 3:130353535Total UDL kN 19:122353532NOTE The exact lintel profile will vary dependent on lintel length and loading‘h’ nominalHeavy Duty LoadHT/HD-150 (For cavity widths 150-165mm)9588100DAMP PROOFING Not required on Hi-Therm lintels. *Up to severe exposure.PLEASE NOTE OTHER CAVITY WIDTHS AND LOADING CONDITIONS ARE AVAILABLEkeystonelintels.com
2CAVITY WALL100mm INNER LEAFRangeCavity Widths 50-165mm100mm Inner LeafPlease use this table to identify the Lintel code required based on cavity width and loading.Contact our technical department for more details on these lintel options. Please note that only a selectionof the range is illustrated in this manual.100MM INNER LEAFLOADINGCAVITY WIDTH12CavityStandardHeavy DutyHeavy DutyExtra Heavy DutyExtra Heavy DutyWidth (mm)Extreme* 50-65S/K-50HD/K-50XHD/K-50CFS/K-50XCFS/K-50X/K-50* /K-110* S/K-150X/K-150*These cavity widths are not illustrated in this manual - please contact our technical department for details.Lintel HotlinesUK - 01283 200 150N.I - 028 8676 2184ROI - 048 8676 2184Fax Back Enquiry Forms are available fordownload at www.keystonelintels.com
CAVITY WALLCavity widths from 50mm To 165mmOUTER LEAF102mmINNER LEAF100mmS/KBlockwork built tight against inner face of the lintel.Place mortar bed on top of blockwork before floorunits are laid to provide even distribution of load.Lintels may be propped to facilitate speed ofconstruction. See Lintel Installation on page 6.Standard Load90-105mm CavityS/K-90 (For cavity widths 90-105mm)13Height 2.02.02.02.62.63.23.23.4Total UDL kN 3:112161921232727272627Total UDL kN 19:110131617182220201922‘h’ nominalManufactured length 600- 1350- 1650- 1950- 2250- 2550- 2850- 3150- 3750- 4200150mm increments1200 1500 1800 2100 2400 2700 3000 3600 4000 48009588100Manufactured length 600150mm 400042004800Height 93.23.2Total UDL kN 3:116222427272625Total UDL kN 19:113181822221920‘h’ nominal110-125mm CavityS/K-110 (For cavity widths 110-125mm)95105100Manufactured length 600150mm 400042004800Height .93.23.2Total UDL kN 3:116222125272625Total UDL kN 19:113181720221920‘h’ nominal150-165mm CavityS/K-150 (For cavity widths 150-165mm)95PLEASE NOTE OTHER CAVITY WIDTHS AND LOADING CONDITIONS ARE AVAILABLE145100keystonelintels.com
CAVITY WALLCavity widths from 50mm To 165mmOUTER LEAF102mmINNER LEAF100mmHD/KBlockwork built tight against inner face of the lintel.Place mortar bed on top of blockwork before floor unitsare laid to provide even distribution of load. Lintels maybe propped to facilitate speed of construction.See Lintel Installation on page 6.Heavy Duty LoadManuf
Keystone’s full range of lintels is also available in stainless steel, providing the same high quality and performance features as our standard galvanised lintels. Keystone produce more than just steel lintels. Our specialist product range is designed to meet the needs of even the most complex project. HI-THERM Keystone has redefined lintel performance with Hi-Therm, the low cost solution to .
SOLID LINTEL Rebar is grade 60 steel ASTM 615 Concrete compressive strength is 3,000 PSI Rebar placement: Clearance from bottom: 1 1/2" Clearance from top: 1 1/2" Special rebar schedules available upon request. Lintel Length 30" to 68" Lintel Length 72" to 88" Lintel Length 90" to 96" Lintel Length 102" to 144" Lintel Length 30" to 64" Lintel .
Masonry lintel design is a critical part of an efficient structural masonry solution. The design of masonry . Figure 2: Steel lintel at bearing Figure 3: Masonry lintel intersection masonry jamb. 2020. Lintel design criteria for all tables below: - Masonry design is based on f'm 2500 psi, strength design, and is designed using NCMA .
through a standard lintel can account for approximately 6%* of the overall heat loss through the fabric of the house. Using a Hi-therm Lintel reduces this figure to 0.25% virtually eliminating thermal bridging. * based on a default lintel Psi value of 0.5 W/m.K 0.03-0.06 Up to 5 times more thermally efficient than a standard steel lintel.
Lintel schedules from drawings Structural calculations for Building Regulations approval General advice on the use of lintels in uncommon situations (e.g. reduced end bearings, point loadings etc) - use the 'Lintel Enquiry Fax Form' on page 19. Special lintel design Technical Department Hotline: 01429 866655 4
the lintel span, the lintel depth cannot exceed the height of masonry above the opening. In addition, if . load is transferred to the lintel with a 60 degree angle, the length over which the concentrated load is distributed on the lintel is given by: L . which is provided in Table 3.1.8.2.1 of the MSJC code. For lintels and other beams, the .
The design of Naylor Prestressed Lintels complies with BS8110:part 1: 1997: Section 4. Naylor Lintels conform to BSEN845 part 2: 2013. Materials used in the manufacture of Naylor Prestressed Lintels comply with BSEN206:2013 and BS8500-1:2015. The prestressing wire complies with BS5896:2012. Naylor Lintels have a low water absorption and as a
steel and concrete lintels and structural precast products, including padstones, staircases and landings. Our flexible design and manufacturing facilities enable your “special” lintel requirements to be produced quickly and efficiently. OUR PRODUCTS Our comprehensive range of standard steel and concrete lintels offers design capability for all
Remember, first aid is a practical skill so the more you physically practice these skills and techniques the better. Completing a first aid course is highly recommended to ensure you can have supervision from an expert in first aid who can check your skills. As you go through the programme ensure you are gathering evidence to upload into eDofE. For example, you could upload photos of you .
