C contour — Lower Deck Contour Limits

Lower deck contoured (e.g. LD-1). Public letter summary only; ULDR drawings are paywalled and are not copied.

Industry label: C
IATA contour letter: C
Deck: Lower Deck
Maximum height: 162.6 cm / 64 in
Base width: 233.7 cm / 92 in
Base length: Not published
Where the taper starts: Profile is modelled as rectangular

Permitted width at height

Read as: at the stated height above the pallet or container floor, this is the maximum overall width the build may occupy. A load that exceeds any single row is out of contour, even if it is under the maximum height.

C section, 162.6 cm tall on a 233.7 cm published width. Rectangle only; no taper is inferred.
Height above floor	Maximum width	Taper
0 cm / 0 in	233.7 cm / 92 in	full published width
162.6 cm / 64 in	233.7 cm / 92 in	full published width

Verification status

Aircraft

Positions accepting this contour are recorded on: B747-400F, B747-8, B747F, B767-200, B767-300, B767-300F, B767-400ER, B777-200, B777-200LR, B777-300ER, B777F, B787-10, B787-8, B787-9. A main-deck contour is never a lower-deck limit — the same PMC that takes 116 in or 118 in on a freighter main deck is limited to about 64 in in a wide-body passenger belly.

Aircraft	Type	Main deck	Lower deck
Boeing 747-400F / 747-400ERF	Freighter	Position count not published	Position count not published
Boeing 747-8 (pax)	Passenger	No main-deck cargo position	Position count not published
Boeing 747-8F	Freighter	34 published positions	Position count not published
Boeing 767-200/-200ER	Passenger	No main-deck cargo position	Position count not published
Boeing 767-300/-300ER	Passenger	No main-deck cargo position	Position count not published
Boeing 767-300F	Freighter	Position count not published	Position count not published
Boeing 767-400ER	Passenger	No main-deck cargo position	Position count not published
Boeing 777-200/-200ER/-300	Passenger	No main-deck cargo position	Position count not published
Boeing 777-200LR	Passenger	No main-deck cargo position	Position count not published
Boeing 777-300ER	Passenger	No main-deck cargo position	Position count not published
Boeing 777F	Freighter	Position count not published	Position count not published
Boeing 787-10	Passenger	No main-deck cargo position	Position count not published
Boeing 787-8	Passenger	No main-deck cargo position	Position count not published
Boeing 787-9	Passenger	No main-deck cargo position	Position count not published

ULDs built to C

Code	Also coded	Class	Max gross
AKC	LD1/AVC/AVD/AVK	Container	1,588 kg / 3,501 lb

Work a build against the C contourThe build-up guide takes the pallet step by step so each layer is checked against the contour before release.