MGS9202.PDF.pdf
PDF 21 KB Posted
- Solicitation number
- 300000258931827
- Issued by
- Missouri
About this file
This is a material specification document issued by the Missouri Department of Transportation (MoDOT) for galvanized steel marker posts, specifically addressing channel, modified channel light, medium, and heavy or delineator configurations. The specification establishes comprehensive requirements for the manufacturing, coating, and dimensional standards of these posts, which are procured by MoDOT and the Missouri Highways and Transportation Commission (MHTC) on an as-needed basis under a contract with an initial term of three years and two optional one-year renewal periods. Bidders must submit responses electronically through MissouriBUYS MOVERS, by mail via USPS, UPS, or FedEx, or must notify the buyer of record, Ashten Nichols, at least five days prior to the solicitation closing date if submitting hard copy bids. The specification does not identify specific item quantities, response dates, due dates, site visits, or bidder conferences within this document.
The specification requires posts to be manufactured from re-rolled rail steel or equivalent conforming to ASTM A 499, Grade 60, with galvanizing applied after fabrication in accordance with AASHTO M 111 standards, maintaining a minimum average zinc coating weight of two ounces per square foot with individual specimens not falling below 1.8 ounces per square foot. Three post categories are defined with specific weight-per-foot requirements: Heavy Posts at 2.60 ± 0.20 pounds per foot, Medium Posts at 2.03 ± 0.23 pounds per foot, and Light Posts at 1.30 ± 0.20 pounds per foot. The specification includes precise dimensional tolerances for cross-sectional dimensions and hole punching patterns, with light posts requiring 30 holes spaced one inch center-to-center and medium and heavy posts requiring holes spaced one inch center-to-center for the full post length. Fabricators must provide certification confirming compliance with all specification requirements, including test results for mechanical and chemical properties, and material acceptance is contingent upon acceptable certification and engineer inspection.
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Other files
| File | Type | Posted |
|---|---|---|
| MODOT 0000000356SL_SUPPLIER.pdf | ||
| MGS0402.pdf | ||
| MGS0304.pdf |
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Text version
MGS 92-02G
(Page 1 of 2)
(Rev. 08-24-11 PL)
CONSTRUCTION & MATERIALS
GALVANIZED STEEL MARKER POSTS MGS 92-02G
1.0 SCOPE. This specification covers the requirements for channel, modified channel light, medium, and heavy or delineator galvanized steel marker posts.
2.0 MATERIAL.
2.1 Steel. The posts shall be re-rolled rail steel or an equivalent steel conforming to the mechanical requirements of ASTM A 499, Grade 60 and to the chemical requirements of ASTM A 1.
2.2 Coating. The posts shall be galvanized after fabrication in accordance with the requirements of AASHTO M 111. The weight of zinc coating shall average not less than two (2) ounces per square foot of the surface coated, and no individual specimen shall show less than
1.8 ounces per square foot.
2.2.1 Damaged coating shall be repaired in accordance with Specification Sec 1081.
2.3 Dimensions.
2.3.1 Length. The posts shall be of the length specified in the bid request or as stated in the standard plans with a tolerance in length of minus one inch and plus two inches.
2.3.2 Weight Per Foot. The weight per foot before punching or galvanizing shall comply with the following:
Pounds Per Foot Heavy Post 2.60 ± .20 Medium Post 2.03 ± .23 Light Posts 1.30 ± .20
2.3.3 Cross Section Dimensions. The cross-section dimensions shall comply with the details shown on Drawing "A" of this specification.
2.3.4 Hole Punching. All holes shall be 3/8" in diameter, spaced along the center line of the web.
2.3.4.1 Light posts shall have 30 holes, one inch center to center, beginning one inch from the end of the post.
2.3.4.2 Medium and Heavy posts shall have holes of one inch center to center for the entire length of the post, beginning one inch from the end of the post.
3.0 CERTIFICATION. The fabricator shall furnish to the engineer at destination a certification stating that the posts furnished comply with all requirements of this specification. The certification shall include or have attached specific results of tests of the mechanical and chemical properties of the steel conforming to Section 2.1 of this specification. A certification shall be submitted with the bid.
MGS 92-02G
(Page 2 of 2) (Rev. 08-24-11 PL)
CONSTRUCTION & MATERIALS
4.0 INSPECTION. The material will be inspected at the source or at destination as determined by the engineer.
5.0 ACCEPTANCE. Acceptance of posts furnished under this specification will be based on an acceptable certification and on inspection by the engineer.
DRAWING ‘A’
CHANNEL, MODIFIED CHANNEL, OR DELINEATOR STEEL MARKER POST
Dimensions (inches)*
A B C D T1 T2 T3
HEAVY POST
1-1/4 TO
1-5/8
2-1/2 TO
3-1/4
1 TO
1-3/8
1/2 TO
3/4
5/32 TO
7/32
3/32 TO
7/32
5/32 TO
7/32
MEDIUM POST
1-1/4 TO
1-5/8
2-1/2 TO
3-1/4
3-1/32 TO
1-3/8
15/32 TO
23/32
7/64 TO
11/64
7/64 TO
11/64
7/64 TO
11/64
LIGHT POST
7/8 TO
1-1/4
1-15/16 TO
2-3/16
5/8 TO
3/8 TO
5/8
3/32 TO
5/32
3/32 TO
5/32
3/32 TO
5/32
*Tolerances shown hereon are absolute. No further dimensional tolerances will be acceptable.
C
A T2
D D
T1
T3
B
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