<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31440235</termId><termName>rigid frames</termName><termType>PT</termType><termNote><![CDATA[ Structural frames in which all columns and beams are rigidly connected, with no hinged joints. ]]></termNote><termCreatedDate>2026-03-30 20:58:40</termCreatedDate><relation><relationType>UF</relationType><termId>31440236</termId><termName>frames, portal</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440237</termId><termName>portal frame</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440238</termId><termName>frames, rigid</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31440239</termId><termName>rigid frame</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31414719</termId><termName>structural frames</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31458786</termId><termName>tube structures</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31458796</termId><termName>box frames</termName><termType>PT</termType></relation></term>  </Zthes>