Existing Railing Meeting Current Standards (NCHRP Report 350)

Existing railing types that are no longer used for new construction but are considered to meet the crash test criteria in NCHRP Report 350 are summarized in the following table.
Table 4.2.2: Acceptable Railing No Longer Used for New Construction
Railing Type
NCHRP Report 350 Approval Level
Nominal Height
Minimum Height
Description
T101RC
TL-3
27 in.
27 in.
A version of T101 rail for retrofitting on bridges with curbs. Superseded by T131RC.
T2
TL-3
27 in.
27 in.
Vertical faced concrete parapet with W-beam fascia; designed for vehicular traffic. Superseded by T201.
C2
TL-2
39 in. from sidewalk
39 in. from sidewalk
Vertical faced concrete parapet with W-beam fascia and steel pipe rail; designed for vehicular and pedestrian traffic. Superseded by C201.
T201
TL-3
27 in.
27 in.
Vertical faced concrete parapet; designed for vehicular traffic. Superseded by T221.
C201
TL-2
42 in.
42 in.
Vertical faced concrete parapet with steel pipe rail; designed for both vehicular and pedestrian traffic. Superseded by C221.
B201
Not applicable*
63 in.
63 in.
Vertical faced concrete parapet with chain-link fence; designed for bicycle and pedestrian use. Superseded by B221. *The presence of chain-link fence makes this railing only approved for speeds of 45 mph and below.
T202
TL-2
27 in.
27 in.
Concrete posts with concrete beam rail; designed for vehicular traffic. Superseded by T203.
C202
TL-2
42 in.
42 in.
Concrete posts with concrete beam rail; designed for vehicular traffic. Superseded by C203.
T203
TL-3
27 in.
27 in.
Concrete posts with concrete beam rail; designed for vehicular traffic. Superseded by T223.
C203
TL-2
42 in.
42 in.
Concrete posts with a steel pipe rail between each post, a concrete beam rail and a steel pipe rail; designed for both vehicular and pedestrian traffic. Superseded by C223.
B221
Not applicable*
68 in.
68 in.
Vertical faced concrete parapet with chain-link fence; designed for bicycle and pedestrian traffic. *The presence of chain-link fence makes this railing only approved for speeds of 45 mph and below.
C4 (A)
TL-2
42 in
42 in
Concrete parapet with aluminum railing; designed for vehicular and pedestrian traffic. Superseded by C402. There are two heights of C4 rail-39 inches and 42 inches. The 39 inch tall version is acceptable for traffic only.
C4 and C4 (S)
TL-3
42 in
42 in
Concrete parapet with steel railing; designed for both vehicular and pedestrian traffic. Superseded by C402. There are two heights of C4 rail-39 inches and 42 inches. The 39 inch tall version is acceptable for traffic only.
T401
TL-3
33 in.
31 in.
18-inch concrete parapet and a steel ellipse or rectangular HSS 15 inches above the concrete. It has twin steel posts spaced a maximum of 10 ft. apart. It features a bolt anchorage system for the steel rail posts that may be drilled and epoxyanchored, allowing slip-forming of the concrete parapet. Its parapet is thicker than that of the T4(S) railing, from which its design is derived. Superseded by C402.
T421
TL-2
32 in.
30 in.
Slanted steel posts with large round tubular rails; designed for vehicular traffic.
T5
TL-4
32 in.
29 in.
Concrete safety shaped parapet; designed for vehicular traffic. Superseded by T501. Needs a 3 foot long vertical taper at toe of rail on upstream rail end to meet NCHRP Report 350 criteria.
T501
TL-4
32 in.
29 in.
Concrete safety shaped parapet; designed for vehicular traffic. Superseded by T551.
C501
TL-2
42 in.
42 in.
Concrete safety shaped parapet with steel pipe railing; designed for both vehicular and pedestrian traffic.
T502
TL-4
32 in.
29 in.
Concrete safety shaped parapet with multiple drain slots; designed for vehicular traffic. Superseded by T552.
C502
TL-2
42 in.
42 in.
Concrete safety shaped parapet with multiple drain slots and with steel pipe railing; designed for both vehicular and pedestrian traffic.
T503
TL-4
32 in.
29 in.
Precast concrete safety-shaped parapet bolted to slab; designed for vehicular traffic.
T504
TL-4
32 in.
29 in.
Precast concrete safety-shaped parapet bolted to slab and designed for box-beam and slab-beam structures; designed for vehicular traffic.
T77
TL-3
33 in.
31 in.
Concrete curb with steel posts and two steel tube rails, designed for vehicular traffic.
HT
TL-5
50 in.
47 in.
Modified concrete safety-shaped parapet with steel railing; designed for heavy truck traffic. Superseded by T80HT.
TT
TL-6
90 in.
90 in.
Modified concrete safety-shaped parapet with concrete posts and concrete railing; designed for heavy tank truck traffic. Never issued as a standard rail type. Superseded by T80TT.
T501SW
TL-4
Not applicabl e
Not applicabl e
8-foot reinforced concrete safety-shaped parapet and vertical wall; designed for use on bridges and on pavement. Never issued as a standard rail type. May also be referred to as T501NB and in heights other than 8-feet.
TW3
TL-3
29 in.
27 in.
Concrete curb with steel posts and two steel tube rails, designed for vehicular traffic. Never issued as a standard rail type. Superseded by T1W.
CW2
TL-2
42 in.
42 in.
Concrete curb with steel posts and four steel tube rails, designed for vehicular and pedestrian traffic. Never issued as s standard rail type. Superseded by C1W.
T412
TL-4
42 in.
42 in.
Concrete with 6-inch windows; designed for vehicular traffic. Never issued as a standard rail type. Superseded by C412.
T414
TL-4
42 in.
42 in.
Concrete with 6-inch windows; designed for vehicular traffic. Never issued as a standard rail type. Superseded by C412.
LowProfile
TL-2
20 in.
20 in.
Concrete rail, designed for vehicular traffic. Never issued as a standard rail type. This rail cannot be transitioned with an MBGF, so requires special details for the transition.
PR1
Not applicable
42 in.
42 in.
Steel posts with steel rails, designed for pedestrian traffic.
PR2
Not applicable
42 in.
42 in.
Concrete parapet with steel posts and steel rails, designed for pedestrian traffic.