Tools

Reference values. ULD: base dimensions and reference height; pallet height means netted load, not the empty pallet. Aircraft are examples, subject to configuration and operator approval. Source: Boeing (2012). 40' Flat Rack: CAI example; length between posts, width over side rails, height with ends erected. The other nine maritime rows retain previous references and have not been recertified. Actual limits depend on equipment plate, carrier, route and regulations. Boeing · IATA · CAI
Type	Length (m)	Width (m)	Height (m)	Capacity (m³)	Maximum gross weight (kg)	Tare weight (kg)	Maximum payload (kg)
20' Dry Van (STD)	5.90	2.35	2.39	33.2	30,480	2,200	28,280
40' Dry Van (STD)	12.03	2.35	2.39	67.7	30,480	3,700	26,780
40' High Cube (HC)	12.03	2.35	2.69	76.3	30,480	3,900	26,580
45' High Cube (HC)	13.55	2.35	2.69	86.0	32,500	4,800	27,700
20' Open Top	5.90	2.35	2.39	32.0	30,480	2,350	28,130
40' Open Top	12.03	2.35	2.39	66.0	30,480	3,900	26,580
20' Flat Rack	5.94	2.35	--	--	45,000	2,750	42,250
40' Flat Rack (CAI reference)	11.652	2.374	1.959	--	52,500	5,100	47,400
20' Reefer	5.45	2.29	2.27	27.3	30,480	3,000	27,480
40' Reefer HC	11.56	2.29	2.54	67.3	34,000	4,500	29,500

Technical Notes and Clarifications on Shipping Containers:

All dimensions are expressed in meters and refer to the available internal space.
External measurements are standardized by ISO 668, but internal space may vary slightly depending on manufacturer and model (tolerance ± 2 cm).
Maximum Gross Weight (MGW): It cannot always be fully utilized, as it is limited by road and land transport regulations in each country.

Reference values. ULD: base dimensions and reference height; pallet height means netted load, not the empty pallet. Aircraft are examples, subject to configuration and operator approval. Source: Boeing (2012). 40' Flat Rack: CAI example; length between posts, width over side rails, height with ends erected. The other nine maritime rows retain previous references and have not been recertified. Actual limits depend on equipment plate, carrier, route and regulations. Boeing · IATA · CAI
ULD code	Base length (in)	Base width (in)	Reference height (in)	Type	Aircraft: examples
LD-3 (AKE)	61.5	60.4	64	Half-width container	Boeing 747, 777, 787: lower hold (examples)
LD-6 (ALF)	125	60.4	64	Full-width container	Boeing 747, 777, 787: lower hold (examples)
LD-7 (PAG/P1P)	125	88	64	Pallet with net; reference load height	Boeing 747, 777, 787: lower hold (examples)
LD-9 (AAP)	125	88	64	Container on P1P base	Boeing 747, 777, 787: lower hold (examples)
LD-11 (ALP)	125	60.4	64	Rectangular lower-hold container	Boeing 747, 777, 787: lower hold (examples)
PLA	125	60.4	64	Half pallet with net; reference load height	Boeing 747, 777, 787: lower hold (examples)

AIR FREIGHT RATING: Volumetric Weight Calculation
Volumetric Weight (kg) = (Length (cm) × Width (cm) × Height (cm)) ÷ 6000

*Charges are based on the greater value between Actual Weight and Volumetric Weight. Practical equivalence: 1 m³ = 167 volumetric kg.