https://govtribe.com/category/unspsc/31330000-fabricated-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331400-ultra-violet-welded-uv-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331600-welded-or-brazed-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331100-bonded-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331700-riveted-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331615-monotower-substructure yearly 0.8 https://govtribe.com/category/unspsc/31331500-solvent-welded-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331200-bolted-structural-assemblies yearly 0.8 https://govtribe.com/category/unspsc/31331614-jacket-structure yearly 0.8 https://govtribe.com/category/unspsc/31331300-sonic-welded-structural-assemblies yearly 0.8