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    <title>Struct4U changelog</title>
    <link>https://struct4u.com/changelog/</link>
    <description>Releases of XFEM4U, XFrame2D, XBeam2D and XConstruct, from the release notes. Δ marks a calculation change.</description>
    <language>en-GB</language>
    <lastBuildDate>Thu, 20 Aug 2026 12:00:00 GMT</lastBuildDate>
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    <item>
      <title>XFrame2D 2027-07-01</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-07-01</link>
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      <pubDate>Thu, 20 Aug 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Fixed two memory leaks, one of them in the solver; in certain cases the PC could crash.</li><li>Clearer labels on the moment and shear force lines. (#40)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-05-02</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-05-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2027-05-02</guid>
      <pubDate>Wed, 19 Aug 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Fixed a memory leak in the solver.</li><li>Clearer labels on the moment and shear force lines. (#40)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-05-01</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-05-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2027-05-01</guid>
      <pubDate>Thu, 13 Aug 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Fire resistance: calculate the fire resistance of a steel beam.</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-06-01</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-06-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2027-06-01</guid>
      <pubDate>Thu, 13 Aug 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Fire resistance: calculate the fire resistance of steel structures.</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFEM4U 2027-04-02</title>
      <link>https://struct4u.com/changelog/#xfem4u-2027-04-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xfem4u-2027-04-02</guid>
      <pubDate>Tue, 04 Aug 2026 12:00:00 GMT</pubDate>
      <category>XFEM4U</category>
      <description><![CDATA[<ul><li>Fire data of beams: fixed a crash when Properties was opened without fire data, and editing the fire data of several beams at once.</li></ul><p><a href="https://software.struct4u.win/downloads/XFEM4U/Release_notes_XFEM4U_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-04-01</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-04-01</link>
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      <pubDate>Sat, 25 Jul 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Chessboard loading is generated once and can be generated again with the new Load generator menu option.</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-05-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-05-01</link>
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      <pubDate>Sat, 25 Jul 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Δ Beams on an elastic foundation and tension-only or compression-only members are now solved iteratively in the load combinations only, as in XFEM4U. Iterating in single load cases could fail to converge. (#34)</li><li>Δ The SLS combinations were not generated correctly. Fixed.</li><li>Δ The automatic renumbering of nodes, on by default, could remove beams by mistake. Fixed.</li><li>Much faster drawing of models with many beams. (#31)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFEM4U 2027-04-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xfem4u-2027-04-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xfem4u-2027-04-01</guid>
      <pubDate>Fri, 10 Jul 2026 12:00:00 GMT</pubDate>
      <category>XFEM4U</category>
      <description><![CDATA[<ul><li>Fire resistance: calculate the fire resistance of steel structures.</li><li>IFC export: export the complete model to the open IFC format for BIM applications.</li><li>Calculation speed is back at the level of version 2026.3. The notes state that the calculations keep the same reliability. (#63)</li><li>Δ Plates: where a node falls on a plate edge, the edge is now also split for plates that are hidden (layer switched off).</li><li>Δ Orthotropic plates: an <i>E</i> entered by the user was overwritten with the default value. Fixed. (#67)</li><li>Δ Correction factor <i>k</i><sub>c</sub> (EN 1993-1-1, 6.3.2.3, Table 6.6) now follows Serna et al., using <i>M</i><sub>max</sub> and the moments at five points.</li><li>Δ Lateral-torsional buckling: the factor <i>C</i><sub>2</sub> was not calculated correctly in all situations. Corrected; the notes expect a small effect.</li></ul><p><a href="https://software.struct4u.win/downloads/XFEM4U/Release_notes_XFEM4U_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-03-02 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-03-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2027-03-02</guid>
      <pubDate>Tue, 07 Jul 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Δ Chessboard loading: the ψ factor in the SLS combinations was wrongly set to 1.00. Fixed. (#30)</li><li>Output table: <i>V</i><sub>Rd,c</sub> was printed too low for slab reinforcement given as diameter and spacing, because the longitudinal reinforcement area showed as 0 mm². The notes state that the calculation and the design were correct: an output error only. (#23)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-04-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-04-01</link>
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      <pubDate>Mon, 29 Jun 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Δ A programming error meant that tension-only and compression-only members were not calculated correctly in certain situations. Fixed. (#27)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-03-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-03-01</link>
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      <pubDate>Fri, 19 Jun 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>New solver: much shorter calculation times, especially for large geometrically non-linear models.</li><li>Chessboard loading for variable loads (loaded and unloaded spans): the load cases and combinations are generated automatically. (#3160, #829, #2748)</li><li>Δ Lateral-torsional buckling: for continuous beams where hogging dominates in an intermediate span (NEN-EN 1993-1-1 NB, Figure NB.6, formula NB.7), the sign of <i>C</i><sub>2</sub> was reversed in the critical moment (formula NB.NB.2). Corrected. (#3162)</li><li>Δ Lateral-torsional buckling: <i>C</i><sub>2</sub> is now extrapolated for loads on the top flange, because <i>C</i><sub>2</sub> assumes the load at the centre of gravity of a flange. The notes expect a small effect. (#5)</li><li>Δ Lateral-torsional buckling: the maximum moment of a beam segment between fork supports or lateral restraints could be taken from outside that segment, so the unity check could come out too high. Fixed. (#6)</li><li>Δ Correction factor <i>k</i><sub>c</sub> (EN 1993-1-1, 6.3.2.3, Table 6.6) now follows Serna et al., using <i>M</i><sub>max</sub> and the moments at five points.</li><li>Pasting several beams could place their beam loads more than once. Fixed. (#3147, #18)</li><li>The design working life is printed in the output. (#3081)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-03-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-03-01</link>
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      <pubDate>Fri, 19 Jun 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>New solver: much shorter calculation times, especially for large geometrically non-linear models.</li><li>Draw a beam perpendicular to another beam, with snapping to the perpendicular point. (#3207)</li><li>Δ Wind load generator: for wind parallel to the ridge, the distance <i>e</i>/4 for zone F is now measured from the eaves instead of from the ridge. (#3114)</li><li>Δ Lateral-torsional buckling: for continuous beams where hogging dominates in an intermediate span (NEN-EN 1993-1-1 NB, Figure NB.6, formula NB.7), the sign of <i>C</i><sub>2</sub> was reversed in the critical moment (formula NB.NB.2). Corrected. (#3162)</li><li>Δ Lateral-torsional buckling: <i>C</i><sub>2</sub> is now extrapolated for loads on the top flange, because <i>C</i><sub>2</sub> assumes the load at the centre of gravity of a flange. The notes expect a small effect. (#5)</li><li>Δ Lateral-torsional buckling: the maximum moment of a beam segment between fork supports or lateral restraints could be taken from outside that segment, so the unity check could come out too high. Fixed. (#6)</li><li>Δ Correction factor <i>k</i><sub>c</sub> (EN 1993-1-1, 6.3.2.3, Table 6.6) now follows Serna et al., using <i>M</i><sub>max</sub> and the moments at five points.</li><li>Δ Lateral-torsional buckling of tapered timber members used the wrong section height. Corrected. (#19)</li><li>The design working life is printed in the output. (#3081)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2027-03-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xconstruct-2027-03-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2027-03-01</guid>
      <pubDate>Fri, 15 May 2026 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Fire resistance module: the fire resistance of tension members and of beams not prone to lateral-torsional buckling, the section factor of unclad and clad profiles, and the steel temperature over time, with a set of fire protection materials.</li><li>Timber column module, to Eurocode. (#3086)</li><li>Foundation piles: enter your own soil profiles, or edit generated ones, and link them to one or more CPTs. (#3022, #3044, #3067, #3166, #3200)</li><li>Δ NEN 9997-1:2025+C1:2025 implemented; the pile factors of Table 7.c are updated.</li><li>Δ Punching: <i>u</i><sub>0</sub> and <i>u</i><sub>1</sub> were not calculated correctly for the position All-around edge. Fixed. (#3204, #3209)</li><li>Δ Lateral-torsional buckling: for continuous beams where hogging dominates in an intermediate span (NEN-EN 1993-1-1 NB, Figure NB.6, formula NB.7), the sign of <i>C</i><sub>2</sub> was reversed in the critical moment (formula NB.NB.2). Corrected. (#3162)</li><li>Δ Bolts: the tensile stress areas <i>A</i><sub>s</sub> of M33 to M52 are updated. (#7)</li><li>Foundation pile: the adhesion level can now be set for every CPT; it was only initialised for the first one. (#3159)</li><li>The design working life is printed in the output. (#3081)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFEM4U 2027-03-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xfem4u-2027-03-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xfem4u-2027-03-01</guid>
      <pubDate>Tue, 12 May 2026 12:00:00 GMT</pubDate>
      <category>XFEM4U</category>
      <description><![CDATA[<ul><li>Excel round trip: export nodes, beams, load cases and combinations, beam and node loads or node displacements to Excel, edit them there and import them back. (#1861, #2322, #2324, #2359, #2630)</li><li>Export to Tekla Structures: an XFEM4U model can now be converted into a Tekla model, through an XML import tool made by Tekniq Solution.</li><li>Δ Surface loads: in certain cases the beam loads were not generated correctly. Fixed. (#16)</li><li>Δ Lateral-torsional buckling: <i>C</i><sub>2</sub> is now extrapolated for loads on the top flange, because <i>C</i><sub>2</sub> assumes the load at the centre of gravity of a flange. The notes expect a small effect. (#5)</li><li>Δ Lateral-torsional buckling: the maximum moment of a beam segment between fork supports or lateral restraints could be taken from outside that segment, so the unity check could come out too high. Fixed. (#6)</li><li>Load generator: a new Delete loads button removes generated load cases and combinations. (#3119)</li></ul><p><a href="https://software.struct4u.win/downloads/XFEM4U/Release_notes_XFEM4U_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFEM4U 2027-02-01</title>
      <link>https://struct4u.com/changelog/#xfem4u-2027-02-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xfem4u-2027-02-01</guid>
      <pubDate>Wed, 08 Apr 2026 12:00:00 GMT</pubDate>
      <category>XFEM4U</category>
      <description><![CDATA[<ul><li>Word output: fixed a crash, and images are now as sharp as in the PDF output. (#3182)</li><li>Tekla import via XML works again, and the IDEA StatiCa export no longer crashes on profiles such as THQ. (#3186)</li><li>Dialogs and the print preview display in full on high-resolution screens.</li></ul><p><a href="https://software.struct4u.win/downloads/XFEM4U/Release_notes_XFEM4U_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFEM4U 2027-01-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xfem4u-2027-01-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xfem4u-2027-01-01</guid>
      <pubDate>Mon, 23 Mar 2026 12:00:00 GMT</pubDate>
      <category>XFEM4U</category>
      <description><![CDATA[<ul><li>Runs on .NET 10. A start dialog lists recent models with a preview image, which is also saved as a PNG in the project folder.</li><li>XFrame2D models can be converted to XFEM4U models via XML export and import. (#2864)</li><li>Surface loads and panels: set the tolerance above and below the plane that decides which beams lie in it. (#3009)</li><li>View wizard: generate several views for the report from one camera position. (#3127)</li><li>Dutch national annex NEN-EN 1992-1-1+C2:2011+A1:2015/NB+A1:2020+A2:2025 added. (#2866)</li><li>The stirrup spacings the design chooses from can now be set by the user. (#3007)</li><li>Δ Wind load generator: for wind parallel to the ridge, the distance <i>e</i>/4 for zone F is now measured from the eaves instead of from the ridge. (#3114)</li><li>Δ Mesher: plates with edge beams on an elastic foundation were meshed irregularly, and the mesher sometimes hung. Improved. (#3096)</li><li>Δ The design of stirrups is improved. (#2862)</li><li>Δ Lateral-torsional buckling: for continuous beams where hogging dominates in an intermediate span (NEN-EN 1993-1-1 NB, Figure NB.6, formula NB.7), the sign of <i>C</i><sub>2</sub> was reversed in the critical moment (formula NB.NB.2). Corrected. (#3162)</li><li>Δ The additional deflection is now calculated from the total final deflection including creep. (#3047)</li><li>The code check is on by default for new projects. (#3126)</li><li>A deflection that exceeds its limit is now printed in the output as an error in red, not as a warning. (#2688, #3015)</li><li>The design working life is printed in the output. (#3081)</li><li>Lateral-torsional buckling: a beam group can now combine different profiles, so the length between fork supports (<i>L</i><sub>g</sub>) can be determined. (#3033)</li></ul><p><a href="https://software.struct4u.win/downloads/XFEM4U/Release_notes_XFEM4U_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-02-01</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-02-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2027-02-01</guid>
      <pubDate>Mon, 19 Jan 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Ordering and paying online from the program works again.</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2027-02-01</title>
      <link>https://struct4u.com/changelog/#xconstruct-2027-02-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2027-02-01</guid>
      <pubDate>Mon, 19 Jan 2026 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Ordering and paying online from the program works again.</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-02-01</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-02-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2027-02-01</guid>
      <pubDate>Mon, 19 Jan 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Ordering and paying online from the program works again.</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-01-02</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-01-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2027-01-02</guid>
      <pubDate>Fri, 16 Jan 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>The factors ψ<sub>0</sub>, ψ<sub>1</sub> and ψ<sub>2</sub> are back in the load case table and can be entered again. (#3072)</li><li>A deflection that met its limit was shown in red in the output. Fixed. (#3015, #3071)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-01-02</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-01-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2027-01-02</guid>
      <pubDate>Fri, 16 Jan 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>The factors ψ<sub>0</sub>, ψ<sub>1</sub> and ψ<sub>2</sub> are back in the load case table and can be entered again. (#3072)</li><li>A deflection that met its limit was shown in red in the output. Fixed. (#3015, #3071)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2027-01-01</title>
      <link>https://struct4u.com/changelog/#xconstruct-2027-01-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2027-01-01</guid>
      <pubDate>Wed, 14 Jan 2026 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Moment connection: the input now checks that the compressive stress in the column stays below the yield strength. (#2811)</li><li>The bottom cover is printed correctly; for slabs, the number of stirrup legs and the strut angle are no longer printed. (#3053)</li><li>The Word output no longer contains a licence-key message from Syncfusion. (#3068)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2027-01-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2027-01-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2027-01-01</guid>
      <pubDate>Mon, 12 Jan 2026 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Runs on .NET 10. A start dialog lists recent models with a preview image, which is also saved as a PNG in the project folder.</li><li>Dutch national annex NEN-EN 1992-1-1+C2:2011+A1:2015/NB+A1:2020+A2:2025 added. (#2866)</li><li>The stirrup spacings the design chooses from can now be set by the user. (#3007)</li><li>Δ The shear force coverage line of a slab over several supports was not determined correctly. Fixed. (#2853)</li><li>Δ The design of stirrups is improved. (#2862)</li><li>Δ The additional deflection is now calculated from the total final deflection including creep. (#3047)</li><li>The limits for total and additional deflection, previously fixed, can now be set in the beam data. (#3026)</li><li>A deflection that exceeds its limit is now printed in the output as an error in red, not as a warning. (#2688, #3015)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2027-01-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xframe2d-2027-01-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2027-01-01</guid>
      <pubDate>Mon, 12 Jan 2026 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Runs on .NET 10. A start dialog lists recent models with a preview image, which is also saved as a PNG in the project folder.</li><li>XFrame2D models can be converted to XFEM4U models via XML export and import. (#2864)</li><li>Chosen beams can be excluded from the code check. (#2787)</li><li>Δ Moment connection: the compressive stress in the column is now limited to the yield strength. (#2811)</li><li>Δ The additional deflection is now calculated from the total final deflection including creep. (#3047)</li><li>A deflection that exceeds its limit is now printed in the output as an error in red, not as a warning. (#2688, #3015)</li><li>Lateral-torsional buckling: a beam group can now combine different profiles, so the length between fork supports (<i>L</i><sub>g</sub>) can be determined. (#3033)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-07-03</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-07-03</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-07-03</guid>
      <pubDate>Wed, 07 Jan 2026 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Reading the login.ini file works again. (#3062)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-07-02 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-07-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-07-02</guid>
      <pubDate>Thu, 11 Dec 2025 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Δ Concrete section: with no stirrups entered (<i>A</i><sub>sw</sub> = 0), the shear reinforcement was not checked. Fixed. (#3025)</li><li>Merging PDF files works again. (#3038)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-07-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-07-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-07-01</guid>
      <pubDate>Wed, 03 Dec 2025 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>The first Struct4U program on .NET 10.</li><li>Shear connection module for hinged connections: with a fin plate, a short end plate or angle cleats. (#1481, #2506, #2756)</li><li>Moment connection: two new types with the beam resting on the column. (#708, #911, #1583, #1740, #2392, #2656)</li><li>Dutch national annex NEN-EN 1992-1-1+C2:2011+A1:2015/NB+A1:2020+A2:2025 added. (#2866)</li><li>Δ Concrete column: the material factor for concrete in the fire situation changed from 1.50 to 1.00. (#2798)</li><li>Δ Concrete column joint: for mortar joint types a, b and c, <i>v</i> is now increased by 20 mm, in line with NEN-EN 1992-1-1, 10.9.4.3(8). (#2800)</li><li>Δ Concrete column, biaxial bending: the minimum eccentricity for bending about the z-axis was calculated with the height <i>h</i> instead of the width <i>b</i>. Fixed. (#2888)</li><li>Δ Concrete section: the cracking moment <i>M</i><sub>Rk</sub> was not always right, because the bar spacing <i>s</i> used for the maximum steel stress was wrong. Fixed. (#2999)</li><li>Δ Steel column: the moment distribution along the column, and so the factor <i>C</i><sub>my</sub> of NEN-EN 1993-1-1 Table B.3, was not determined correctly. Fixed. (#2868)</li><li>Δ Brace connection: the block tearing check of the bolt group was missing for angles and for strips with one bolt row. Added. (#3010)</li><li>Δ Joists: the reduction factor <i>k</i><sub>r</sub> was not applied to <i>V</i><sub>z,Ed</sub> for a point load. Fixed. (#3003)</li><li>Purlin and joists: the deflection limit, fixed at 0.004<i>L</i>, can now be set.</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-06-04</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-06-04</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-06-04</guid>
      <pubDate>Thu, 25 Sep 2025 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>The Word output is improved. (#2866)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-06-03 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-06-03</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-06-03</guid>
      <pubDate>Sat, 20 Sep 2025 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Δ Concrete column: the joint calculation for a wall was incorrect. Fixed. (#2852)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2026-02-03</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2026-02-03</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2026-02-03</guid>
      <pubDate>Thu, 04 Sep 2025 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Opening an example at the first start-up works again.</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2026-02-03</title>
      <link>https://struct4u.com/changelog/#xframe2d-2026-02-03</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2026-02-03</guid>
      <pubDate>Thu, 04 Sep 2025 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Opening an example at the first start-up works again.</li><li>Word output: fixed a crash. (#2870)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2026-02-02</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2026-02-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2026-02-02</guid>
      <pubDate>Tue, 02 Sep 2025 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Concrete deflection: fixed a crash for spring-supported beams. Concrete deflections are not calculated for beams on an elastic foundation or on springs. (#2842)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-06-02</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-06-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-06-02</guid>
      <pubDate>Thu, 28 Aug 2025 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Purlin: the variable load was not saved. Fixed. (#2840)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2026-02-02</title>
      <link>https://struct4u.com/changelog/#xframe2d-2026-02-02</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2026-02-02</guid>
      <pubDate>Tue, 26 Aug 2025 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Fixed crashes when exporting to Word and after an XML import. (#2836, #2839)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XBeam2D 2026-02-01</title>
      <link>https://struct4u.com/changelog/#xbeam2d-2026-02-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xbeam2d-2026-02-01</guid>
      <pubDate>Sun, 24 Aug 2025 12:00:00 GMT</pubDate>
      <category>XBeam2D</category>
      <description><![CDATA[<ul><li>Output as a Microsoft Word document (.docx): every Eurocode formula in the report becomes a Word equation.</li><li>Copying a beam now also copies its beam loads. (#2813)</li></ul><p><a href="https://software.struct4u.win/downloads/XBeam2D/Release_notes_XBeam2D_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XConstruct 2026-06-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xconstruct-2026-06-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xconstruct-2026-06-01</guid>
      <pubDate>Sun, 24 Aug 2025 12:00:00 GMT</pubDate>
      <category>XConstruct</category>
      <description><![CDATA[<ul><li>Output as a Microsoft Word document (.docx): every Eurocode formula in the report becomes a Word equation.</li><li>Δ NEN 8700: the national annex changed when a project was reopened. Fixed. (#2782)</li><li>Δ Brace connection, strip with two bolt rows: the bolt spacing <i>e</i><sub>2</sub> was not determined correctly, so the bearing resistance came out too high. The block tearing check of the bolt group is added. (#2809)</li><li>Concrete section: stirrups can now be entered by the user. (#2810)</li><li>Aerated concrete: the block grades are now G2, G4, G6 and G8. (#2781)</li><li>Pile output: <i>R</i><sub>b;cal</sub> and <i>R</i><sub>s;cal</sub> were printed in the wrong column, and the output for different pile sizes was wrong. Fixed. (#2802, #2824)</li></ul><p><a href="https://software.struct4u.win/downloads/XConstruct/Release_notes_XConstruct_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFEM4U 2026-03-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xfem4u-2026-03-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xfem4u-2026-03-01</guid>
      <pubDate>Sun, 24 Aug 2025 12:00:00 GMT</pubDate>
      <category>XFEM4U</category>
      <description><![CDATA[<ul><li>Output as a Microsoft Word document (.docx): every Eurocode formula in the report becomes a Word equation.</li><li>Δ The envelope (moment and shear force lines and so on) was not determined correctly when a combination was switched off in the combination table. Fixed. (#2828)</li><li>Panels and surface loads: a new point is only added to the contour when it lies in the plane, so no warped planes are created by accident.</li><li>The graphical display of beam deflections in the global x, y and z directions is corrected. (#2823)</li></ul><p><a href="https://software.struct4u.win/downloads/XFEM4U/Release_notes_XFEM4U_en.pdf">Release notes (PDF)</a></p>]]></description>
    </item>
    <item>
      <title>XFrame2D 2026-02-01 · Δ calculation change</title>
      <link>https://struct4u.com/changelog/#xframe2d-2026-02-01</link>
      <guid isPermaLink="true">https://struct4u.com/changelog/#xframe2d-2026-02-01</guid>
      <pubDate>Sun, 24 Aug 2025 12:00:00 GMT</pubDate>
      <category>XFrame2D</category>
      <description><![CDATA[<ul><li>Output as a Microsoft Word document (.docx): every Eurocode formula in the report becomes a Word equation.</li><li>Copying a beam now also copies its beam loads. (#2813)</li><li>Δ Lateral-torsional buckling: the restraint distances of a beam group defined with node numbers were not determined correctly. Fixed. (#2788)</li></ul><p><a href="https://software.struct4u.win/downloads/XFrame2D/Release_notes_XFrame2D_en.pdf">Release notes (PDF)</a></p>]]></description>
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