[{"data":1,"prerenderedAt":176},["ShallowReactive",2],{"copy:verification:en":3,"copy:reports:en":123},{"seo":4,"hero":7,"anatomy":14,"recheck":40,"reports":62,"changes":66,"cases":72,"limits":90,"reviewers":102,"problem":106,"quoteLabel":119,"close":120},{"title":5,"description":6},"Verification: check a Struct4U calculation","How to recheck a Struct4U report: every clause, formula and value printed, sample reports, calculation changes flagged, and a dossier for reviewers.",{"label":8,"title":9,"lead":10,"examples":11,"changelog":12,"reviewers":13},"Verification","Check a Struct4U calculation yourself.","The report is written to be rechecked. Each check names its clause, prints its inputs and the formula with the values filled in, and ends with the result against its limit. Here is what to look for, how to recheck a number, and what changed between versions.","Sample reports","Changelog","Reviewer dossier",{"label":15,"title":16,"soft":17,"lead":18,"notes":19,"fig":35,"caption":36,"open":37,"page":38,"note":39},"Checkable","What makes a report checkable.","Five things on every page.","Below is one page of a real report, line for line. The other sample reports print their checks the same way.",[20,23,26,29,32],{"title":21,"text":22},"Code, edition and annex","The standards the calculation applies, with edition and national annex.",{"title":24,"text":25},"Inputs with their source","Material class, factors and dimensions, with values and units.",{"title":27,"text":28},"The formula, as in the code","In symbols first, with the clause or equation number beside it.",{"title":30,"text":31},"The values filled in","The same formula with numbers, so you can re-key it.",{"title":33,"text":34},"The check and its verdict","Condition, limit and outcome, with the clause.","FIG. 1","Page 2 of the column base sample report (XConstruct 2023.1.01, 12 Nov 2022), transcribed with the decimal commas and \"x\" as printed.","Open the PDF","p. 2 of 4","Formulas and values are printed in the report itself, not in a separate log.",{"label":41,"title":42,"lead":43,"steps":44,"pocketLabel":60,"pocket":61},"Recheck","How to recheck a result","You need the report, your copy of the code and a calculator.",[45,48,51,54,57],{"title":46,"text":47},"Note the program and version","The header of every page prints them with the date and time. Cite them in your calculation package.",{"title":49,"text":50},"Find the governing check","Summary tables list the unity checks per member, load combination and clause. Start with the highest.",{"title":52,"text":53},"Look up the clause","Each check names its clause or equation number, in the code edition listed under Applied standards.",{"title":55,"text":56},"Re-key the numbers","Take the line with the values filled in and recompute it. A difference in the last digit is rounding.",{"title":58,"text":59},"Tell us when it differs","Send the model, the check and the value you expect, with the reason. How to do that is at the end of this page.","FIG. 1, re-keyed","2 ÷ 3 × 1559.1 × 1000 ÷ 40374 = 25.74 N\u002Fmm²",{"label":11,"title":63,"lead":64,"cta":65},"Try it on a real report.","Real reports in English and Dutch. Each opens as a PDF.","All sample reports",{"label":67,"title":68,"lead":69,"cta":70,"note":71},"Changes","Calculation changes are flagged.","Each release in the changelog carries a Δ where the release notes describe a correction or method change that can alter results for an unchanged model. The most recent ones:","Full changelog","Taken from the release notes of each program.",{"label":73,"title":74,"lead":75,"head":76,"kinds":83,"model":88,"report":89},"Cases","Verification cases","Program results next to a hand calculation, a textbook solution or a benchmark, with the deviation stated, including the ones that are not zero.",{"no":77,"case":78,"reference":79,"program":80,"deviation":81,"files":82},"No.","Case","Compared with","Program","Largest deviation","Files",{"hand":84,"textbook":85,"benchmark":86,"paper":87},"Hand calculation","Textbook","Benchmark","Paper","Model","Report",{"label":91,"title":92,"lead":93,"items":94,"cta":101},"Limits","Where the software stops","Knowing the limits is part of checking. These come from the manuals and the release notes.",[95,96,97,98,99,100],"XFEM4U analyses frames second-order (geometrically non-linear). Plates and walls are analysed first-order only.","Member imperfections are not modelled: after a second-order analysis with global imperfections, members are checked to EN 1993-1-1, 6.3, with the buckling length equal to the member length (5.2.2(7)b).","XBeam2D is geometrically linear. It does not calculate concrete deflections for beams on an elastic foundation or on springs.","XConstruct uses the Dutch national annex only.","XFrame2D and XBeam2D take up to {nodes} nodes, {beams} members, {cases} load cases and {combinations} combinations, with {perCombination} load cases per combination.","The programs run on 64-bit Windows 10 and 11 only. The Word add-in needs Word for Windows (desktop).","Design codes and annexes per program",{"label":103,"title":104,"text":105,"cta":13},"Reviewers","For building control and checking engineers","The reviewer dossier puts the version history, the methods and analysis types, the clauses and annexes covered and the known limits on one page you can print or save as PDF.",{"label":107,"title":108,"lead":109,"items":110,"cta":116,"subject":117,"body":118},"Report a problem","Found a result you cannot reproduce?","Send it to support. Include:",[111,112,113,114,115],"the model file (.xfem, .xfr2, .xbe2 or .xcst);","the program and version from the report header;","the check, page and load combination;","the value you expect, with the clause, table or hand calculation behind it;","the value in the report.","E-mail support","Result question: [program and version]","Program and version (report header):\nCheck, page and load combination:\nValue in the report:\nValue I expect, and why (clause, table or hand calculation):\n\nThe model file is attached.","A user on the output",{"title":121,"text":122,"secondary":11},"Recheck it on your own model.","Download the programs for free and run a calculation you know the answer to.",{"jobs":124,"materials":161,"langs":165,"annex":169,"pages":173,"page":174,"files":175},{"xfem4u-steel-hall-eurocode":125,"xfem4u-steel-hall-aisc":129,"xframe2d-timber-roof-frame":133,"xbeam2d-concrete-beam":137,"xconstruct-moment-connection":141,"xconstruct-column-base":145,"xconstruct-concrete-section":149,"xconstruct-concrete-column":153,"xconstruct-punching-shear":157},{"title":126,"summary":127,"thumbAlt":128},"Steel hall in 3D, to Eurocode","A steel hall with dead, imposed, snow and two wind load cases. Second-order analysis with imperfections (EN 1993-1-1, 5.3.2) and unity checks per member to clauses 6.2 and 6.3, with the Dutch annex. The report is in Dutch.","Page 2 of the report: the 3D model of the hall, members coloured by profile.",{"title":130,"summary":131,"thumbAlt":132},"The same hall, to ANSI\u002FAISC 360-16","The steel hall checked to AISC 360-16 with the Direct Analysis Method (Section C1.1, LRFD) on a second-order analysis with initial imperfections, member by member to chapters D to H.","Page 52 of the English report: flexural buckling check E3 of beam 30, an IPE 300, with the values filled in.",{"title":134,"summary":135,"thumbAlt":136},"Timber roof frame","A timber roof frame (C18, 38 × 235 mm) with snow and wind loads generated to EN 1991. Second-order analysis with imperfections (EN 1995-1-1, 5.4.4) and member checks to EN 1995-1-1. The English report uses the German annex, the Dutch one the Dutch annex.","Page 20 of the English report: envelope moment and shear force diagrams of the roof frame.",{"title":138,"summary":139,"thumbAlt":140},"Reinforced concrete beam","A 1000 × 260 mm slab strip in C20\u002F25 over three supports, with spans of 2.0 and 6.2 m and a 2.0 m cantilever: ULS and SLS envelopes, longitudinal and shear reinforcement, and crack control without direct calculation.","Page 7 of the English report: the longitudinal reinforcement table and the shifted moment line.",{"title":142,"summary":143,"thumbAlt":144},"Bolted end-plate moment connection","An IPE 240 beam connected to an HEB 160 column with 8 M16 bolts, grade 8.8, in S235: resistance per component and bolt row, rotational stiffness and classification (semi-rigid) to NEN-EN 1993-1-8.","Page 1 of the English report: elevation and section of the connection with the bolt layout.",{"title":146,"summary":147,"thumbAlt":148},"Steel column base","An HEB 300 on a 380 × 460 × 25 mm base plate with M24 anchors in C25\u002F30, for N = 300 kN, V = 20 kN and M = 25 kNm: concrete bearing, anchors, welds and rotational stiffness to NEN-EN 1993-1-8.","Page 1 of the English report: elevation and plan of the column base with loads and dimensions.",{"title":150,"summary":151,"thumbAlt":152},"Concrete section with M-N-κ diagram","A 500 × 700 mm beam section in C20\u002F25 with 5 Ø16 top and bottom: bending, shear and torsion to NEN-EN 1992-1-1, with the M-N-κ diagram and the bending stiffness it gives.","Page 3 of the English report: the M-N-κ diagram in the ultimate limit state.",{"title":154,"summary":155,"thumbAlt":156},"Circular concrete column, with fire","A column of 450 mm diameter in C45\u002F55, 3.5 m long: second-order effects (NEN-EN 1992-1-1, 5.8), biaxial bending, fire resistance R60 by the 500 °C isotherm method (NEN-EN 1992-1-2) and the mortar joint at the base.","Page 3 of the English report: sectional calculation of the circular column with the forces in steel and concrete.",{"title":158,"summary":159,"thumbAlt":160},"Punching shear","A 240 mm slab on a circular column with an enlarged head, 275 kN with eccentricity, in C30\u002F37: punching to NEN-EN 1992-1-1, 6.4.3. Result: no punching reinforcement needed.","Page 1 of the English report: section and plan of the slab and column head with the control perimeter.",{"steel":162,"concrete":163,"timber":164},"Steel","Concrete","Timber",{"en":166,"nl":167,"es":168},"English","Dutch","Spanish",{"NL":170,"DE":171,"US":172},"Dutch annex","German annex","","{n} pp","p. {n}","Report files",1792702114891]