Keywords: Sloppedinteriorceiling.jpg en Preserve window opening clearance by recessing suspended ceilings from windows or configuring ceilings to slopeupward toward the window head or step down toward the building interior 2012-04-24 http //www gsa gov/graphics/pbs/TechnicalGuideLightingFINAL2 pdf GSA PD-USGov Uploaded with UploadWizard GSA technical preservation guidelines |