ATTACHMENT B - MGS 08-01D - Sign Mounting Clips.pdf
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- Attached to
- Sign Hardware and Sign Supports - Statewide
- Solicitation number
- 300000216945820
- Issued by
- Missouri
About this file
This is a technical specification document (MGS 08-01D) for sign mounting clips and attaching hardware required by the Missouri Department of Transportation (MoDOT) under a statewide Sign Hardware and Sign Supports contract with the Missouri Highways and Transportation Commission (MHTC). The specification details requirements for extruded aluminum panel sign mounting hardware, including post clips, bolts, washers, and locknuts as referenced in Section 1042 of MoDOT's Standard Specifications for Highway Construction. Post clips must comply with ASTM B 108, ANSI 356-T6 Aluminum Alloy standards and be manufactured using permanent mold cast methods with dimensions as specified in Figure 1, allowing a tolerance of 1/8 inch. Associated bolts must comply with ASTM B 211 (2024-T4 or 6061-T6 aluminum alloy), washers must comply with ASTM B 209 (ALCLAD 2024-T3), and locknuts with nylon inserts must comply with ASTM B 211 (2017-T4). The contract period runs from the date of award through March 31, 2027, with four one-year renewal options available.
Aluminum post clips will be ordered in quantities of 500 fully assembled units, with each unit consisting of a post clip, bolt, washer, and locknut as a complete assembly. Acceptance of the hardware is contingent upon manufacturer certification of compliance with ASTM B 108 requirements and successful completion of any tests deemed necessary by the engineer. MoDOT will not accept bid responses by email, and all bids must be submitted through the formal Invitation for Bid (IFB) process for qualification to serve as a supplier throughout the state of Missouri.
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Text version
MGS 08-01D
(Page 1 of 2)
(Rev. 05-20-09)
CONSTRUCTION & MATERIALS
SIGN MOUNTING CLIPS AND ATTACHING HARDWARE MGS 08-01D
1.0 Description. This specification describes the requirements for extruded aluminum panel sign mounting hardware to include post clips (sign clips), bolts, washers and locknuts as outlined in Section 1042 of Missouri Department of Transportation Standard Specifications for Highway Construction.
2.0 Materials. Post clips shall be in compliance with ASTM B 108, ANSI 356-T6 Aluminum Alloy.
Post clip bolts, washers and locknut shall be composed of Aluminum Alloy, see paragraph 2.3.
2.1 Post Clip Dimensions. Post clips shall have dimensions as illustrated in Figure 1 with a tolerance of ±1/8 inch.
2.2 Post Clip Casting. Post clips shall be cast using a permanent mold cast method.
2.3 Post Clip Bolt, Washer and Locknut Composition, see Figure 1 for Dimensions.
2.3.1 Post clip bolts shall comply with ASTM B 211, 2024-T4 or 6061-T6.
2.3.2 Post clip washers shall comply with ASTM B 209, ALCLAD 2024-T3 or 2024-T3.
2.3.3 Post clip locknuts (with nylon insert) shall comply with ASTM B 211, 2017-T4.
3.0 Certification and Acceptance. Acceptance of Aluminum post clips will be based on compliance of material requirements stated in paragraph 2.0 and certification from manufacturer of compliance with ASTM B 108. Acceptance is also dependent on successful completion of any tests deemed necessary by the engineer.
4.0 Ordering. Aluminum Post clips will be ordered in quantities of 500 fully assembled units.
Each fully assembled unit shall consist of a post clip, post clip bolt, washer and locknut.
ATTACHMENT B
MGS 08-01D Figure 1 (Page 2 of 2) (Rev. 05-20-09)
CONSTRUCTION & MATERIALS
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