A load transfer platform: the compacted granular layer, usually reinforced withgeosynthetics, constructed over a field of rigid inclusions to distribute structuralloads onto the column heads. It is a planar sampling feature, not an installation,because it is constructed over the columns as a distinct layer rather than withinthe rigid inclusion system. It cites the system it belongs to, as a statement ofmembership, through the inherited optional diggs:samplingFeatureGroupRef. The rigidinclusions beneath a platform are not enumerated here: each column cites itsplatform through diggs:RIColumnType/ltpRef. Where ltpRef is absent, membership fallsback to testing the column's referencePoint against the featureExtent of theplatform, which is an inference rather than a statement.
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<element name="LoadTransferPlatform" type="diggs:LoadTransferPlatformType" substitutionGroup="diggs:AbstractPlanarSamplingFeature"><annotation><documentation>A load transfer platform: the compacted granular layer, usually reinforced with geosynthetics, constructed over a field of rigid inclusions to distribute structural loads onto the column heads. It is a planar sampling feature, not an installation, because it is constructed over the columns as a distinct layer rather than within the rigid inclusion system. It cites the system it belongs to, as a statement of membership, through the inherited optional diggs:samplingFeatureGroupRef. The rigid inclusions beneath a platform are not enumerated here: each column cites its platform through diggs:RIColumnType/ltpRef. Where ltpRef is absent, membership falls back to testing the column's referencePoint against the featureExtent of the platform, which is an inference rather than a statement.</documentation></annotation></element>