What are Michigan Temporary Concrete Barrier “Type S” Specifications?
The Michigan Department of Transportation outlines specifications regarding the proper dimensions for temporary concrete barriers with limited deflection (Type S), including general notes, plan view details, elevation details, and more.
Michigan Temporary Concrete barrier General Notes
The Michigan Department of Transportation’s general instructions are as follows:
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Do not lift or move the TCB sections by use of the connecting loop bars D1, D2, D3 or D4. Do not apply excessive force to these connecting loop bars.
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Concrete clear cover for reinforcing bars must be 1-1/2” (min.) except where otherwise specified.
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Lifting slots should be constructed as specified to facilitate the drainage of water after installation on the roadway.
Michigan Temporary Concrete Barrier Specifications
Michigan type S temporary barrier should conform to the following specifications, according to the Michigan Department of Transportation:
Plan View, Type S
The difference between Type J1/J2 and Type S barriers is that J1 and J2 must be used together as a pair (since they are not symmetrical), but Type S can stand alone (since it is symmetrical).
Type S barriers measure 12’-6” long and 1’-10-1/2” wide. They include holes for stakes, anchor bolts or rods (to secure the barrier to the ground). These holes are 2” in diameter (typ.) and are spaced symmetrically along the barrier in pairs (for every hole on the left side, there is an identical hole on the right side).
The first pair of holes is set 2’-0” from the left edge of the barrier; the second pair of holes is set 4’-3” away from the first set of holes; the third set of holes is set 4’-3” away from the second set of holes (moving from left to right).
Barriers include A1 Bar, A2 Bars (in pairs), and B1 Bars. They include a loop bar on both sides of the barrier, which are symmetrical in nature.
Elevation View, Type S
Type S barriers include 4” diameter lifting holes with an 11 gauge steel round mechanical tubing sleeve. (Lifting holes are optional). Barriers include two lifting slots, which are each 1’-0” long and 3” deep. The lifting slots are spaced 2’-0” apart from each other and are centered on the barrier.
Barriers include A1 Bars, A2 Bars, D1 Bars, D2 Bars, D3 Bars and D4 Bars.
On the right side of the barrier, the bars protrude from the edge of the barrier and are spaced as follows: D1 bar is spaced 6” from the top of the barrier; D2 bar is spaced 3” below D1 bar; D3 bar is spaced 1’-5” below D2 bar.
On the left side of the barrier, the bars protrude from the edge of the barrier and are spaced as follows: D3 bar is spaced 7-1/2” from the top of the barrier; D2 bar is spaced 1’-5” below D3 bar; D1 bar is spaced 3” below D2 bar.
End View, Type S
Barriers measure 1’-10-1/2” wide at the bottom, 8” wide at the top, and stand 2’-8” tall. They are symmetrical in nature and include a 7” v-notch that is centered on the barrier (optional). Barriers include an optional 4” diameter lifting hole, which is set 10” from the groundline. Barriers include blockouts for stakes, anchor bolts or rods to secure the barrier to the roadway. Loop assemblies (typ.) are centered on the barrier. The bottom slope is 7” tall. The upper slope is 1’-10” tall.
This blog post is an interpretation of specifications by the Michigan Department of Transportation (MDOT). Please consult with Michigan DOT's most recent requirements for definitive information.
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