Author: Tewodros Yosef
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Evaluation of Midwest Guardrail System with Reduced Embedment and Reduced Post Spacing for Low-fill Culverts and Other Applications
Author: Tewodros Yosef
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Midwest Guardrail System for Long-span Culvert Applications
Author:
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 157
Book Description
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 157
Book Description
Development of the Midwest Guardrail System (MGS) for Standard and Reduced Post Spacing and in Combination with Curbs
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 378
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 378
Book Description
NCHRP 350 Development and Testing of a Guardrail Connection to Low-fill Culverts
Author:
Publisher:
ISBN:
Category : Bridge railings
Languages : en
Pages : 205
Book Description
In this research, a W-beam guardrail system was developed for installation with the steel post attached to the top of a low-fill concrete culvert. The guardrail system was constructed with a 2.66-mm (12-gauge) thick W-beam rail totaling 53.34 m in length. The post spacing was 1,905-mm on center for post numbers 1-9 and 33-41, while the post spacing for post numbers 9-33 was 952.5-mm on center. Two full-scale vehicle crash tests, using 3/4 ton pickup trucks, were performed on the W-beam guardrail system.
Publisher:
ISBN:
Category : Bridge railings
Languages : en
Pages : 205
Book Description
In this research, a W-beam guardrail system was developed for installation with the steel post attached to the top of a low-fill concrete culvert. The guardrail system was constructed with a 2.66-mm (12-gauge) thick W-beam rail totaling 53.34 m in length. The post spacing was 1,905-mm on center for post numbers 1-9 and 33-41, while the post spacing for post numbers 9-33 was 952.5-mm on center. Two full-scale vehicle crash tests, using 3/4 ton pickup trucks, were performed on the W-beam guardrail system.
Testing of State Roadside Safety Systems. Volume III: Appendix B: Crash Testing and Evaluation of a Guardrail System for Low-fill Culvert
Author: K. K. Mak
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Development and Evaluation of the Midwest Guardrail System (MGS) Placed Adjacent to a 2:1 Fill Slope
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Top-mounted Sockets for Weak-post MGS on Culverts
Author: Scott K. Rosenbaugh
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 142
Book Description
Top-mounted sockets for use with the weak-post, Midwest Guardrail System (MGS) on low-fill culverts were developed, tested, and evaluated. The system was adapted from the MGS bridge railing (and its other adaptations) for attachment to the top slab of a concrete box culvert. Three design concepts were developed and evaluated through dynamic component testing. Both lateral and longitudinal impacts were conducted on the design concepts while mounted to simulated concrete culverts. Two concepts, a cylindrical concrete foundation and a steel tube socket assembly, proved strong enough to withstand the impact loads transferred from the posts without sustaining significant damage or displacements. However, the third concept, a concrete slab, fractured and allowed the sockets to rotate back without developing the full bending strength of the posts. Thus, only the cylindrical concrete foundation and the steel tube socket assembly in combination with the weak-post, MGS were determined to be crashworthy according to the Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) impact safety criteria. The new top-mounted, socketed, weak-post, W-beam MGS for low-fill culverts was designed with multiple advantages over other guardrail treatments for culverts. The guardrail system has an unrestricted system length and does not require a transition when attached to standard MGS. The top-mounted system can be placed parallel to the roadway with a constant lateral offset regardless of the position and orientation of the culvert headwall. Additionally, the attachment configurations were designed utilizing epoxy anchors, enabling the system to be installed on new or existing culverts. Finally, the sockets remain undamaged during impact events, which allows for quick guardrail repairs by simply removing damaged posts, placing new replacement posts into the sockets, and replacing any damaged guardrail sections.
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 142
Book Description
Top-mounted sockets for use with the weak-post, Midwest Guardrail System (MGS) on low-fill culverts were developed, tested, and evaluated. The system was adapted from the MGS bridge railing (and its other adaptations) for attachment to the top slab of a concrete box culvert. Three design concepts were developed and evaluated through dynamic component testing. Both lateral and longitudinal impacts were conducted on the design concepts while mounted to simulated concrete culverts. Two concepts, a cylindrical concrete foundation and a steel tube socket assembly, proved strong enough to withstand the impact loads transferred from the posts without sustaining significant damage or displacements. However, the third concept, a concrete slab, fractured and allowed the sockets to rotate back without developing the full bending strength of the posts. Thus, only the cylindrical concrete foundation and the steel tube socket assembly in combination with the weak-post, MGS were determined to be crashworthy according to the Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) impact safety criteria. The new top-mounted, socketed, weak-post, W-beam MGS for low-fill culverts was designed with multiple advantages over other guardrail treatments for culverts. The guardrail system has an unrestricted system length and does not require a transition when attached to standard MGS. The top-mounted system can be placed parallel to the roadway with a constant lateral offset regardless of the position and orientation of the culvert headwall. Additionally, the attachment configurations were designed utilizing epoxy anchors, enabling the system to be installed on new or existing culverts. Finally, the sockets remain undamaged during impact events, which allows for quick guardrail repairs by simply removing damaged posts, placing new replacement posts into the sockets, and replacing any damaged guardrail sections.
Evaluation of Critical Flare Rates for the Midwest Guardrail System (MGS)
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 314
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 314
Book Description
Evaluation of the Midwest Guardrail System (MGS) with White Pine Wood Posts
Author: Cale J. Stolle
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 150
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 150
Book Description
Performance Evaluation of the Midwest Guardrail System - Update to NCHRP 350 Test No. 3-11 (2214MG-1)
Author: Karla A. Polivka
Publisher:
ISBN:
Category : Bridge railings
Languages : en
Pages : 75
Book Description
Publisher:
ISBN:
Category : Bridge railings
Languages : en
Pages : 75
Book Description