ReadTheSet
Architectural, scale 1/8" = 1'-0"

A-121, Level 1 Reflected Ceiling Plan

Ceiling heights, fixture layout, reflected orientation.

The drawing

A-121 Level 1 Reflected Ceiling Plan, Millbrook Branch LibraryARCH D sheet, 36 by 24 inches. Drawn at 1/8" = 1'-0". Use the layer tray and the measure tool below the drawing.ABCDE123BBBBCCCBBBBAAAAAAAAAAAAAAAAAAAAAAABBBBBBBBBAAAAAAAA2'-0" TYP6'-0" CLRType A troffer laid into the grid, see the ceiling legendType C pendant, bottom 8'-0" above the floorNo ceiling. Structure and services exposed and paintedN08'-0"16'-0"24'-0"32'-0"1/8" = 1'-0"1 LEVEL 1 REFLECTED CEILING PLANVESTIBULE 101LOBBY 102CIRCULATION DESK 103CHILDREN'S LIBRARY 104COMMUNITY ROOM 105CORRIDOR 114STAIR 1 112ELEVATOR 113TOILET 108TOILET 109ELECTRICAL 111MECHANICAL 110STAFF WORKROOM 107STORAGE 1069'-0" GYP12'-0" GYP10'-0" ACT10'-0" ACT12'-0" ACT9'-0" ACT9'-0" GYP8'-0" GYP9'-0" GYP9'-0" GYP10'-0" EXP10'-0" EXP9'-0" ACT9'-0" EXPCEILING LEGENDType A, 2 ft by 4 ft recessed linear troffer. Laid into the suspended grid.Type B, 6 in round recessed downlight. Recessed in gypsum board.Type C, 24 in diameter suspended pendant. Suspended, bottom 8'-0" above the floor.Supply diffuser, 24 in square, four way throwReturn grille, 24 in squareCEILING MATERIALSACTSuspended acoustical ceiling tile in exposed tee gridGYPGypsum board ceiling on suspended steel framing, paintedEXPExposed structure and services, painted outCEILING NOTES1. This is a reflected ceiling plan. It is drawn in the same orientation as A-101, so it lays straight over the floor plan.2. Door swings are not shown. A swing belongs to the floor plan.3. Tags give the finished height above this floor, then the material. Heights are to the underside of the finished ceiling.4. Set the suspended grid out from the wall shown dimensioned and keep border tiles equal on opposite sides of a room.5. Coordinate every device in a ceiling with M-101 and E-101.CEILING SCHEDULE, LEVEL 1ROOM101102103104105114112113108109111110107106NAMEVestibuleLobbyCirculation DeskChildren's LibraryCommunity RoomCorridorStair 1ElevatorToiletToiletElectricalMechanicalStaff WorkroomStorageHEIGHT9'-0"12'-0"10'-0"10'-0"12'-0"9'-0"9'-0"8'-0"9'-0"9'-0"10'-0"10'-0"9'-0"9'-0"MATERIALGYPGYPACTACTACTACTGYPGYPGYPGYPEXPEXPACTEXPNorthgate Design StudioArchitecture and interiorsStructural and civil: Kestrel EngineeringPROJECTMillbrook Branch Library412 Kestrel Avenue, MillbrookMillbrook Public Library DistrictProject number 2026-114ISSUE2026-08-14 Issued for constructionSCALE1/8" = 1'-0"DRAWNNDSCHECKEDQAREVISIONSNODATEDESCRIPTIONSHEET TITLELevel 1 Reflected Ceiling PlanSHEET NUMBERA-121
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Layers on A-121

Drag to pan, scroll or pinch to zoom, or use the buttons. With the drawing focused, the arrow keys pan, plus and minus zoom, and 0 fits the sheet. Every tag, marker and dimension is a focusable target: press Tab to walk them and Enter to select one.

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How to read this sheet

A reflected ceiling plan asks you to imagine a mirror lying on the floor. You are looking down at the sheet, but what you are seeing is the ceiling above, reflected. The consequence is the one thing worth learning here: the plan is drawn in the same orientation as the floor plan. North is still north, grid A is still on the west, and A-121 lays straight over A-101. Readers who expect a mirror image get every fixture on the wrong side of the room.

The second convention is what is missing. There are no door swings on this sheet. A swing describes how a leaf moves across a floor, and it has nothing to do with the ceiling, so the openings appear as gaps in the walls and nothing more. Room names and numbers are small and grey here; the tag that matters is the ceiling height tag.

Read a ceiling height tag as two facts joined. The first is the finished height above the floor of this level, written in feet and inches. The second is the material, given as a code that the ceiling legend spells out: ACT for a suspended acoustical tile ceiling in an exposed tee grid, GYP for a gypsum board ceiling on suspended framing, EXP for no ceiling at all, where structure and services are left exposed and painted. The Lobby carries the highest ceiling on this level at 12'-0" and the elevator the lowest at 8'-0". The full list is in the ceiling schedule at the foot of the sheet, and it agrees with every tag on the plan because both are drawn from the same room data.

Where a room has a suspended grid, the grid is drawn at its true module, which is 2'-0" here. Count squares and you are measuring the room. A dimension at the Children's Library locates where the grid starts off the wall, because a grid that is not set out will end in a sliver tile at one side.

Finally read the symbols. A long rectangle with a lamp line is a type A troffer. A circle with a cross in it is a type B downlight. A circle with a solid centre is a type C pendant. A square with its corners drawn in to a neck is a supply diffuser, and a square filled with parallel blades is a return grille. The legend on the left gives all five, and the letter beside each light fixture ties it to the type. Nothing on a ceiling plan is drawn to be guessed at.