B PERMANENT INTERMEDIATE SIGNS AND SUPPORT SYSTEMS - SSP 799S17

Transcription

1 B PERMANENT INTERMEDIATE SIGNS AND SUPPORT SYSTEMS - SSP 799S GENERAL A permanent ground mounted intermediate sign support system is defined as a permanent sign(s) and its breakaway support system with the total sign panel area including any tab(s) greater than 3.6 m² and less than or equal to 7.2 m². The sign panel(s) shall be plywood with a maximum width of 2.4 m and height ranging from 1.5 m to 3.0 m maximum. The intermediate sign is attached to the Slip-Safe Supreme system which is a proprietary breakaway support system developed by Nucor Marion Steel. This system consists of two steel posts each composed of two Rib-Bak posts bolted together along with associated hardware including breakaway components at ground level. This breakaway steel sign support system has been designed to appropriate wind speed and pressure for a 10 year return period in Ontario according to the Canadian Highway Bridge Design Code and meet the crash test acceptance requirements of NCHRP Report 350, Test Level 3. This system is acceptable for installations on all provincial highways REFERENCES Design and Contract Standards Office Memo # Roadside Safety Manual Ministry of Transportation Ontario Drawings (MTOD) Ontario Traffic Manual TENDER ITEMS Intermediate s, Ground Mounted, New Intermediate s, Relocation Intermediate s, Removal SPECIFICATIONS The requirements for Permanent Ground Mounted Intermediate Support Systems are contained in Standard Special Provision (SSP) 799S17. February 2017 Page 1 of 5 B799-10

2 SPECIAL PROVISIONS Refer to Chapter E of this manual to review the applicable standard special provisions STANDARD DRAWINGS Applicable standard drawings are contained in the 900 series of the Ministry of Transportation of Ontario Drawings (MTODs) DESIGN Design shall be in accordance with the appropriate MTODs. The total sign(s) area including all tabs should be from 3.6 m² to 7.2 m². The maximum width (B) of the sign shall be 2.4 m and range of height (H) of the sign including all tabs shall be from 1.5 m to 3.0 m. While 2.4 m wide small signs with heights less than 1.5 m and areas less than 3.6 m² may be installed on intermediate sign support system, it is generally more economical to install small signs on a small sign support system. The designer shall contact the MTO Regional Traffic Office and/or Services Coordinators to obtain input in determining the condition of existing signs, required changes to existing signs, and new sign requirements. The designer shall prepare a list of all new signs, and signs to be relocated or removed. The list shall be summarized in the signing table for insertion into the contract documents. A sample signing table is shown in the Documentation section below. installations are intended for installation on traversable roadsides with sideslopes 3H:1V or flatter, and posts should be offset more than 1.5 m from bottom of drainage ditches, and offset more than 2.1 m from the traffic face of a guide rail system. Design cross-sections shall ensure these minimum offsets are provided. locations shall adhere to the minimum offsets specified in the applicable MTOD. installations should not be installed within the 22 m x 6 m obstacle clear area behind guide rail terminal systems. installations are intended for installation in competent soils of uniform composition. Site foundation conditions requiring a modification to the design or use of another sign support system include: Rock cut Rock fills Soil is exceptionally soft or loose. February 2017 Page 2 of 5 B799-10

3 Source of Information The Regional Traffic Office and/or Services Coordinators are the main sources of information for the above noted tender items and shall provide input for the preparation of the sign inventory, signing table and sign lay-out drawings COMPUTATION These are Plan Quantity Payment Items. The quantity is based on each intermediate sign assembly installation, relocation, and removal. The unit of measurement for Intermediate s is for each intermediate sign assembly installed, relocated, and removed DOCUMENTATION ing Table Where new signs are to be installed, the station location, offset from edge of shoulder, sign number, sign message description, sign size, total sign area, sign supplier and action information shall be detailed in the table. Where existing signs are to be relocated, the station location, offset from edge of shoulder, sign number, sign message description, sign size, total sign area, and action information shall be detailed in the signing table. The existing sign location shall be provided in the comments cell, for example as in the sample table below. Where existing sign installations are to be removed, the station location, offset from edge of shoulder, sign number, message description, sign size, total sign area, and action information shall be detailed in the table. February 2017 Page 3 of 5 B799-10

4 Sample ing Table Location: Highway 400 Northbound Station Offset From ES (m) Number Gt1c + Gt1cB Gd17 + Gd17t + Gd17B + Gd17tB Gt1A + Gt1aB Symbol/ Message Description Conservation Park Advance + Conservation Park Advance (French) Municipality Centre off Hwy + Tab + Municipality Centre off Hwy (French) + Tab Provincial Park Advance + Provincial Park Advance (French) Size BxH (cm) 240x x x30 240x150 Area (m²) Supplied By 5.76 MTO Rel Action Comments Existing at MTO New None 6.48 N/A Rem Not required Notes: Offset from ES: Size: Indicate offset from edge of shoulder to nearest edge of sign. Indicate dimensions of each individual sign board, B for width and H for height. Total Area: Indicate total area of the sign board including any tabs. Supplied By: Action Code: Comments: For each sign board indicate the supplier, i.e. MTO, Other, or N/A. Indicate New, Rel for relocation and/or Rem for removal. Special comments that are not covered in any of the column such as existing sign location etc Drawings The Designer shall prepare a plan view sign lay-out drawing at a scale of 1:1000 or a scale as directed by the MTO Regional Traffic Office to detail all information shown in the signing table for review and approval by the MTO Regional Traffic Office. The final plan view sign lay-out drawing shall be a part of the Contract Document and the signing table may be shown on the same drawing. The Designer shall define all acronyms used in the signing table on the drawing Quantity Sheets Permanent new sign installations, relocations, and removals, shall be indicated on a Miscellaneous 1 Quantity Sheet by location, station and offset, and shall be equal to the number of signs detailed in the signing table. February 2017 Page 4 of 5 B799-10

5 Schedule of Materials MTO-supplied signs are listed in the Tender document on the Schedule of Materials to be Supplied by the Owner. The designer shall enter the appropriate information, (i.e. U.O.M., Description, Supply Point, and Quantity) into the Contract Preparation System (CPS) on the Supplies by MTO form found under the Form of Tender menu item in the appropriate Work Project file. Note: Where more than one sign board or tab is mounted on a sign assembly, each individual signboard or tab is counted as one in the Schedule of Materials. (i.e. Where there is one signboard and two sign tabs on a sign assembly being supplied by MTO, a total of three would be added to the Schedule of Materials.) Documentation Accuracy installation station shall be recorded to the nearest whole meter. offset from the edge of the shoulder shall be recorded to the nearest 0.1 of a meter. area shall be recorded to the nearest 0.01 of a square meter. quantity shall be recorded to the whole number. Spot checking required. February 2017 Page 5 of 5 B799-10