<?xml version="1.0" encoding="UTF-8"?>
<section version="3.1" id="l90x8" category="L">
  <designation>∠90×8</designation>
  <name>∠90×8 Equal angle (GB/T 706)</name>
  <shape>L</shape>
  <productStandard ref="GB-T-706"/>
  <nominalMass unit="kg/m">10.946</nominalMass>
  <dimensions>
    <dim key="b1" unit="mm" label="Leg length 1" status="UNVERIFIED">90</dim>
    <dim key="b2" unit="mm" label="Leg length 2" status="UNVERIFIED">90</dim>
    <dim key="t" unit="mm" label="Thickness" status="UNVERIFIED">8</dim>
    <dim key="r1" unit="mm" label="Root radius" status="UNVERIFIED">10</dim>
  </dimensions>
  <properties>
    <prop key="A" unit="mm2" label="Gross area" status="CALCULATED">1398</prop>
    <prop key="mass" unit="kg/m" label="Mass per metre" status="CALCULATED">10.9705</prop>
    <prop key="Ix" unit="mm4" label="Second moment of area Ix" status="CALCULATED" note="About centroidal axis parallel to leg b2">1071493</prop>
    <prop key="Zx" unit="mm3" label="Elastic section modulus Zx (min)" status="CALCULATED">16540</prop>
    <prop key="rx" unit="mm" label="Radius of gyration rx" status="CALCULATED">27.6896</prop>
    <prop key="Iy" unit="mm4" label="Second moment of area Iy" status="CALCULATED" note="About centroidal axis parallel to leg b1">1071493</prop>
    <prop key="Zy" unit="mm3" label="Elastic section modulus Zy (min)" status="CALCULATED">16540</prop>
    <prop key="ry" unit="mm" label="Radius of gyration ry" status="CALCULATED">27.6896</prop>
    <prop key="I1" unit="mm4" label="Major principal second moment I1" status="CALCULATED">1699940</prop>
    <prop key="I2" unit="mm4" label="Minor principal second moment I2" status="CALCULATED">443046</prop>
    <prop key="r2" unit="mm" label="Minimum radius of gyration r2" status="CALCULATED">17.8052</prop>
    <prop key="alpha" unit="deg" label="Principal axis angle" status="CALCULATED" note="Angle between x-axis and major principal axis">45</prop>
    <prop key="xc" unit="mm" label="Centroid x̄ (from left/heel)" status="CALCULATED">25.2192</prop>
    <prop key="yc" unit="mm" label="Centroid ȳ (from bottom)" status="CALCULATED">25.2192</prop>
    <prop key="J" unit="mm4" label="Torsion constant J" status="CALCULATED" note="Approximate thin-walled value, fillets neglected">29355</prop>
    <prop key="extArea" unit="m2/m" label="External surface area" status="CALCULATED" note="Toe radii neglected">0.3557</prop>
  </properties>
  <source>
    <publisher>Pending verification – nominal dimensions entered by the application developer</publisher>
    <document>GB/T 706:2016 Hot rolled section steel</document>
    <edition>2016</edition>
    <publicationYear>2016</publicationYear>
    <pageReference/>
    <lastUpdated>2026-10-12</lastUpdated>
    <verificationStatus>UNVERIFIED</verificationStatus>
    <notes>Toe radii neglected in calculated properties. Nominal dimensions require verification against GB/T 706:2016 Hot rolled section steel and the manufacturer catalogue before design use.</notes>
  </source>
  <tags/>
</section>
