StacksVerified U.S. regulatory reference

14 CFR Part 420, Appendix E

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
NEW(lbs.)Distance to public area(ft) 1 2Distance to public traffic route distance(ft) 2
≤0.5236142
0.7263158
1291175
2346208
3378227
5419251
7445267
10474284
15506304
20529317
30561337
31563338
50601361
70628377
100658395
150815489
200927556
3001085651
4501243746

1 To calculate distance d to a public area from NEW:

NEW ≤0.5 lbs: d = 236

0.5 lbs <NEW <100 lbs: d = 291.3 + [79.2 *ln(NEW)]

100 lbs ≤NEW ≤450 lbs: d = −1133.9 + [389 *ln(NEW)]

NEW is in lbs; d is in ft; ln is natural logarithm.

To calculate maximum NEW given distance d (noting that d can never be less than 236 ft):

0 ≤d <236 ft: Not allowed (d cannot be less than 236 ft)

236 ft ≤d <658 ft: NEW = exp [(d/79.2)-3.678]

658 ft ≤d <1250 ft: NEW = exp [(d/389) + 2.914]

NEW is in lbs; d is in ft; exp[x] is ex.

2 The public traffic route distance is 60 percent of the distance to a public area.

NEW (lbs)Distance to public area(ft) 1Distance to public traffic route(ft)
450 lbs<NEW ≤30,000 lbs1,250750
30,000 lbs<NEW ≤100,000 lbs40*NEW 1/30.60*(Distance to Public Area).
100,000 lbs<NEW ≤250,000 lbs2.42*NEW 0.5770.60*(Distance to Public Area).
250,000 lbs<NEW50*NEW 1/30.60*(Distance to Public Area).

1 To calculate NEW from distance d to a public area:

1, 243 ft<d ≤1,857 ft: NEW = d3/64,000

1, 857 ft<d ≤3,150 ft: NEW = 0.2162 * d 1.7331

3,150 ft<d: NEW = d3/125,000

NEW is in lbs; d is in ft.

NEW(lbs)IntralineDistance(ft)
5066
7074
10084
15096
200105
300120
500143
700160
1,000180
1,500206
2,000227
3,000260
5,000308
7,000344
10,000388
15,000444
20,000489
30,000559
50,000663
70,000742
100,000835
150,000956
200,0001,053
300,0001,205
500,000 31,429
700,0001,598
1,000,0001,800
1,500,0002,060
2,000,0002,268
3,000,0002,596
5,000,0003,078

1 To calculate intraline distance d from NEW:

d = 18*NEW 1/3

NEW is in pounds; d is in feet

2 To calculate maximum NEW from given intraline distance d:

NEW = d3/5,832

NEW is in pounds; d is in feet.

3 NEW values of more than 500,000 lbs only apply to liquid propellants with TNT equivalents equal to those NEW values. The intraline distances for NEW greater than 500,000 pounds do not apply to division 1.1 explosives.

NEW (lbs)Distance to public area or public traffic route (ft) 1Intralinedistance (ft) 2
≤10007550
1,5008256
2,0008961
3,00010168
5,00011780
7,00013088
10,00014598
15,000164112
20,000180122
30,000204138
50,000240163
70,000268181
100,000300204
150,000346234
200,000385260
300,000454303
500,000569372
700,000668428
1,000,000800500
1,500,000936577
2,000,0001,008630

1 To calculate distance d to a public area or traffic route from NEW:

NEW ≤1,000lbs

d= 75 ft

1,000 lbs<NEW ≤96,000 lbs

d = exp[2.47 + 0.2368*(ln(NEW)) + 0.00384*(ln(NEW))2]

96,000 lbs<NEW ≤1,000,000 lbs

d = exp[7.2297−0.5984*(ln(NEW)) + 0.04046*(ln(NEW))2]

NEW >1,000,000 lbs

d = 8*NEW 1/3

NEW is in pounds; d is in feet; exp[x] is ex; ln is natural logarithm.

To calculate NEW from distance d to a public area or traffic route (noting that d cannot be less than 75 ft):

0 ≤d <75 ft:

Not allowed (d cannot be less than 75 ft) for NEW ≤1000 lbs

75 ft ≤d≤296 ft

NEW = exp[−30.833 + (307.465 + 260.417*(ln(d)))1/2]

296 ft<d≤800 ft

NEW = exp[7.395 + (−124.002 + 24.716*(ln(d)))1/2]

800 ft<d

NEW = d3/512

NEW is in lbs; d is in ft; exp[x] is ex; ln is natural logarithm

2 To calculate intraline distance d from NEW:

NEW ≤1,000 lbs

d = 50 ft

1,000 lbs<NEW ≤84,000 lbs

d = exp[2.0325 + 0.2488*(ln(NEW)) + 0.00313* (ln(NEW))2]

84,000 lbs<NEW ≤1,000,000 lbs

d= exp[4.338−0.1695*(ln(NEW)) + 0.0221*(ln(NEW))2]

1,000,000 lbs<NEW

d = 5*NEW 1/3

NEW is in pounds; d is in feet; exp[x] is ex; ln is natural logarithm

To calculate NEW from an intraline distance d:

0 ≤d <50 ft:

Not allowed (d cannot be less than 50 ft) for NEW ≤1000 lbs

50 ft ≤d≤192 ft

NEW = exp[−39.744 + (930.257 + 319.49*(ln(d)))1/2]

192 ft<d≤500 ft

NEW = exp[3.834 + (−181.58 + 45.249*(ln(d)))1/2]

500 ft≤d

NEW = d3/125

NEW is in pounds; d is in feet; exp[x] is ex; ln is natural logarithm

Energetic liquidsTNT EquivalenceTNT Equivalence
Static Test StandsLaunch Pads.
LO2/LH2See Note 3See Note 3.
LO2/LH2 + LO2/RP-1Sum of (see Note 3 for LO2/LH2) + (10% for LO2/RP1)Sum of (see Note 3 for LO2/LH2) + (20% for LO2/RP1).
LO2/RP-110%20% up to 500,000 lbsPlus 10% over 500,000 lbs
IRFNA/UDMH10%10%.
N2 04/UDMH + N2 H45%10%.

1 A launch site operator must use the percentage factors of table E-5 to determine TNT equivalencies of incompatible energetic liquids that are within an intraline distance of each other.

2 A launch site operator may substitute the following energetic liquids to determine TNT equivalency under this table as follows:

Alcohols or other hydrocarbon for RP-1

H2 O2 for LO2 (only when H2 O2 is in combination with RP-1 or equivalent hydrocarbon fuel)

MMH for N2 H4, UDMH, or combinations of the two.

3 TNT equivalency for LO2/LH2 is the larger of:

(a) TNT equivalency of 8*W2/3, where W is the weight of LO2/LH2 in lbs; or

(b) 14 percent of the LO2/LH2 weight.

ItemDensity(lb/gal)Temperature( °F)
Ethyl alcohol6.668
Hydrazine8.468
Hydrogen peroxide (90 percent)11.668
Liquid hydrogen0.59−423
Liquid oxygen9.5−297
Red fuming nitric acid (IRFNA)12.977
RP-16.868
UDMH6.668
UDMH/Hydrazine7.568
Quantity(lbs)Intraline distance or distance to public area or distance to public traffic route(ft)
10,000510
15,000592
20,000651
30,000746
50,000884
70,000989
100,0001114
150,0001275
200,0001404
300,0001607
500,0001905

1 Multiple tanks containing hydrogen peroxide in concentrations of greater than 91 percent may be located at distances less than those required by table E-7; however, if the tanks are not separated from each other by 10 percent of the distance specified for the largest tank, then the launch site operator must use the total contents of all tanks to calculate each intraline distance and the distance to each public area and each public traffic route.

2 A launch site operator may use the equations below to determine permissible distance or quantity between the entries of table E-7:

W >10,000 lbs Distance = 24 * W1/3

Where Distance is in ft and W is in lbs.

To calculate weight of hydrogen peroxide from a distance d:

d >75 ft

W = exp[−134.286 + 71.998*(ln(d)) −12.363*(ln(d))2 + 0.7229*(ln(d))3]

Pounds of energetic liquidPounds of energetic liquidPublic area and intraline distance to incompatible energetic liquidsIntraline distance to compatible energetic liquidsPounds of energetic liquidPounds of energetic liquidPublic area and intraline distance to incompatible energetic liquidsIntraline distance to compatible energetic liquids
OverNot OverDistance in feetDistance in feetOverNot OverDistance in feetDistance in feet
60,00070,0001,200130
1002006003570,00080,0001,200130
2003006004080,00090,0001,200135
3004006004590,000100,0001,200135
40050060050100,000125,0001,800140
50060060050125,000150,0001,800145
60070060055150,000175,0001,800150
70080060055175,000200,0001,800155
80090060060200,000250,0001,800160
9001,00060060250,000300,0001,800165
1,0002,00060065300,000350,0001,800170
2,0003,00060070350,000400,0001,800175
3,0004,00060075400,000450,0001,800180
4,0005,00060080450,000500,0001,800180
5,0006,00060080500,000600,0001,800185
6,0007,00060085600,000700,0001,800190
7,0008,00060085700,000800,0001,800195
8,0009,00060090800,000900,0001,800200
9,00010,00060090900,0001,000,0001,800205
10,00015,0001,200951,000,0002,000,0001,800235
15,00020,0001,2001002,000,0003,000,0001,800255
20,00025,0001,2001053,000,0004,000,0001,800265
25,00030,0001,2001104,000,0005,000,0001,800275
30,00035,0001,2001105,000,0006,000,0001,800285
35,00040,0001,2001156,000,0007,000,0001,800295
40,00045,0001,2001207,000,0008,000,0001,800300
45,00050,0001,2001208,000,0009,000,0001,800305
50,00060,0001,2001259,000,00010,000,0001,800310

[Doc. No. FAA-2011-0105, 77 FR 55116, Sept. 7, 2012]