³Ô¹Ïtv / ENGINEERING EXPLANATIONCentered rectangle review envelopeBody, reference and review envelopeUse larger body or land extentper axisAdd project allowance on bothsidesCheck irregular / offsetshapes separatelyNot the IPC-7351 land-patternalgorithmIllustrative geometry only. Not to scale, a production setting or evidence of qualification.