Author: Karla A. Lechtenberg
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
MASH Test Designation Nos. 3-11 & 3-17 of a Non-proprietary, High-tension Cable Median Barrier with Closed-section Posts
Author: Karla A. Lechtenberg
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
MASH Test Designation Nos. 3-11 & 3-17 of a Non-proprietary, High-tension Cable Median Barrier with Closed-sections Post
Author: Karla A. Lechtenberg
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
Mash Test Nos. 3-11 and 3-10 on a Non-proprietary Cable Median Barrier
Author: Justine E. Kohtz
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
"The Midwest States Pooled Fund has been developing a new non-proprietary cable median barrier. This new system incorporates four evenly spaced cables, Midwest Weak Posts spaced 8 to 16 ft (2.4 to 4.9 m) intervals, and a bolted, tabbed bracket to attach the cables to each post. Full-scale crash testing was needed evaluate the barrier's safety performance. According to the Manual for Assessing Safety Hardware (MASH) updated/proposed testing matrix for cable barriers installed within a 6H:1 V or median ditch, a series of eight full-scale tests are required to evaluate the safety performance of a system. A ninth test is required to establish the working width for system with variable post spacing" (page i).
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 0
Book Description
"The Midwest States Pooled Fund has been developing a new non-proprietary cable median barrier. This new system incorporates four evenly spaced cables, Midwest Weak Posts spaced 8 to 16 ft (2.4 to 4.9 m) intervals, and a bolted, tabbed bracket to attach the cables to each post. Full-scale crash testing was needed evaluate the barrier's safety performance. According to the Manual for Assessing Safety Hardware (MASH) updated/proposed testing matrix for cable barriers installed within a 6H:1 V or median ditch, a series of eight full-scale tests are required to evaluate the safety performance of a system. A ninth test is required to establish the working width for system with variable post spacing" (page i).
MASH Test No. 3-10 of a Non-proprietary, High-tension Cable Median Barrier for Use in 6H:1V V-ditch (test No. MWP-9)
Author: Mojdeh Asadollahi Pajouh
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 183
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 183
Book Description
MASH Test Nos. 3-10 of a Non-proprietary, High-tension Cable Median Barrier for Use in 6H:1V V-ditch (test No. MWP-8)
Author: Dylan T. Meyer
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 173
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 173
Book Description
Phase I Development of a Non-proprietary, Four-cable, High Tension Median Barrier
Author: Mitch J. Wiebelhaus
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 246
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 246
Book Description
Roadside Design Guide
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 560
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 560
Book Description
Alternative Design of Low-tension Cable Barrier Adjacent to Steep Slopes
Author: Robert W. Bielenberg
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 124
Book Description
In the early 2000s, MwRSF conducted full-scale crash testing on low-tension cable barrier systems installed adjacent to 1.5H:1V slopes. A design was successfully tested according to NCHRP Report 350 criteria, but the tested and approved configuration utilized a 4-ft (1.2 m) post spacing and a 4-ft (1.2 m) offset from the slope break point (SBP). Therefore, NDOT funded this research study to investigate if revisions to the low-tension cable barrier system could be identified which were likely to satisfy MASH requirements and which would be more cost-effective. This research study was conducted to investigate alternative low-tension cable barrier designs and configurations which would be likely to satisfy MASH TL-3 impact conditions and which would improve cost-effectiveness and/or usability for NDOT. Test nos. LTCB-1 through LTCB-5 were conducted on S3x5.7 steel posts at varying offset distances from a 1.8H:1V slope. Test no. LTCB-6 was conducted to evaluate the propensity for S3x5.7 posts to penetrate a small car test vehicle's floor pan, and tearing was observed. Subsequent component tests of an HSS3x2x1/8 tubular post alternative in development for use with high-tension cable median barrier systems was found to provide acceptable performance while mitigating floor pan tearing. Computer simulations were performed to investigate alternative barrier configurations. Various combinations of post spacing, barrier offset, and cable heights were evaluated. It was determined that systems with 3-ft (0.9-m) offset from the slope with 4-ft (1.2-m) post spacing, or 4-ft (1.2-m) offset from the slope with 6-ft (1.8-m) post spacing, may perform acceptably according to MASH TL-3 test designation no. 3-11.
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 124
Book Description
In the early 2000s, MwRSF conducted full-scale crash testing on low-tension cable barrier systems installed adjacent to 1.5H:1V slopes. A design was successfully tested according to NCHRP Report 350 criteria, but the tested and approved configuration utilized a 4-ft (1.2 m) post spacing and a 4-ft (1.2 m) offset from the slope break point (SBP). Therefore, NDOT funded this research study to investigate if revisions to the low-tension cable barrier system could be identified which were likely to satisfy MASH requirements and which would be more cost-effective. This research study was conducted to investigate alternative low-tension cable barrier designs and configurations which would be likely to satisfy MASH TL-3 impact conditions and which would improve cost-effectiveness and/or usability for NDOT. Test nos. LTCB-1 through LTCB-5 were conducted on S3x5.7 steel posts at varying offset distances from a 1.8H:1V slope. Test no. LTCB-6 was conducted to evaluate the propensity for S3x5.7 posts to penetrate a small car test vehicle's floor pan, and tearing was observed. Subsequent component tests of an HSS3x2x1/8 tubular post alternative in development for use with high-tension cable median barrier systems was found to provide acceptable performance while mitigating floor pan tearing. Computer simulations were performed to investigate alternative barrier configurations. Various combinations of post spacing, barrier offset, and cable heights were evaluated. It was determined that systems with 3-ft (0.9-m) offset from the slope with 4-ft (1.2-m) post spacing, or 4-ft (1.2-m) offset from the slope with 6-ft (1.8-m) post spacing, may perform acceptably according to MASH TL-3 test designation no. 3-11.
MASH TL-3 Evaluation of the Unreinforced, Single-slope Concrete Median Barrier
Author: Robert W. Bielenberg
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 102
Book Description
The Ohio Department of Transportation (ODOT) requested an evaluation of an unreinforced, single-slope concrete median barrier capable of satisfying Test Level 3 (TL-3) safety requirements found in the Manual for Assessing Safety Hardware, Second Edition (MASH 2016). The barrier was designed with a height of 42 in. (1,067 mm), a base width of 28 in. (711 mm), and top width of 12 in. (305 mm). The tarmac surface was milled down 1 in. (25 mm) to accommodate the barrier and asphalt pad. The barrier was cast in place using concrete with a minimum compressive strength of 4,000 psi (27.6 MPa). Expansion joints were installed in 20-ft (6.1-m) intervals to simulate cracking and potential barrier discontinuities. An asphalt pad, installed on the milled surface using a tack coat, functioned as the barrier keyway and extended 96 in. (2,438 mm) from the traffic and back sides of the barrier. Previous testing of similar single-slope concrete barriers indicated that only one full-scale crash test (MASH test designation no. 3-11) was needed to satisfy TL-3 criteria. During the test, the 5,001-lb (2,268-kg) pickup impacted the installation at a speed of 62.8 mph (101.0 km/h) and at an angle of 24.9 degrees for an impact severity of 116.3 kip-ft (157.7 kJ). The vehicle was safely contained and redirected, and the test satisfied safety performance evaluation criteria of test designation no. 3-11 found in MASH 2016.
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 102
Book Description
The Ohio Department of Transportation (ODOT) requested an evaluation of an unreinforced, single-slope concrete median barrier capable of satisfying Test Level 3 (TL-3) safety requirements found in the Manual for Assessing Safety Hardware, Second Edition (MASH 2016). The barrier was designed with a height of 42 in. (1,067 mm), a base width of 28 in. (711 mm), and top width of 12 in. (305 mm). The tarmac surface was milled down 1 in. (25 mm) to accommodate the barrier and asphalt pad. The barrier was cast in place using concrete with a minimum compressive strength of 4,000 psi (27.6 MPa). Expansion joints were installed in 20-ft (6.1-m) intervals to simulate cracking and potential barrier discontinuities. An asphalt pad, installed on the milled surface using a tack coat, functioned as the barrier keyway and extended 96 in. (2,438 mm) from the traffic and back sides of the barrier. Previous testing of similar single-slope concrete barriers indicated that only one full-scale crash test (MASH test designation no. 3-11) was needed to satisfy TL-3 criteria. During the test, the 5,001-lb (2,268-kg) pickup impacted the installation at a speed of 62.8 mph (101.0 km/h) and at an angle of 24.9 degrees for an impact severity of 116.3 kip-ft (157.7 kJ). The vehicle was safely contained and redirected, and the test satisfied safety performance evaluation criteria of test designation no. 3-11 found in MASH 2016.
High Tension Cable Median Barrier
Author: Juan C. Medina
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 138
Book Description
Publisher:
ISBN:
Category : Median strips
Languages : en
Pages : 138
Book Description