BRIDGE DESIGN MANUAL PDF
Bridge Design. Manual. (LRFD). M December Engineering and Regional Operations. Bridge and Structures Office. Bridge Design. Manual. (LRFD). M June Engineering and Regional worldcreation.info pdf. BDC16MB NJDOT Design Manual for Bridges and Structures - 6th Edition, i. Table of Contents. TABLE OF CONTENTS. SECTION 1.
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MnDOT BRIDGE OFFICE. LRFD Bridge Design Manual. Minnesota Department of Transportation. Hadley Avenue North • Mail Stop Manual into LRFD Bridge Manual to produce a consolidated manual. Section 3 - Added requirement to submit design calculations in PDF. The author of Bridge Design Manual (BDM) is the Methods Section of the Office of .. worldcreation.info).
There are a number of different beam shapes in the U. The below chart is a sample of those products. Precast is utilized to construct both the superstructure and substructures of all types of bridges. Superstructures include: Whereas substructures include: Learn more about the specific precast components. Design Resources. Architectural Resources. Aesthetic Versatility. Design Details. Building Enclosure Design. Building Engineering Resources.
Design for Fire. Design for Seismic. Design for Blast Resistance. Design for Storm Resistance. Transportation Engineering Resources. Bridge Design. Precast Bridge Decks.
Precast Concrete Pavement. Adjacent Bridge Beams. How Precast Builds. About Precast. Floors and Roofs. It states that the Department will grant a permit for the transportation of any structural beam member or component that measures feet or less and weighs no greater than , pounds provided the individual axle weights on the vehicle and trailer transporting the beam member or component do not exceed 20, pounds.
The phrase structural beam may be interpreted to mean any structural member or component Design Requirements The vehicle regulations of the General Statutes and Policy Statement PT establish design guidelines for the length, width, height and weight of prefabricated structural members and components.
To avoid problems associated with transporting materials during construction, prefabricated structural members or components that will require a permit to be transported should be identified early in the design phase.
The maximum member or component shipping length, width, height and weight shall be shown on the General Plan. The actual, as designed, shipping lengths, widths, heights and weights should be shown on the Final Plans for Review.
The shipping information will be reviewed by the Oversize and Overweight Permits Section, which will determine if the members are transportable.
If sufficient justification exists, the Office of Engineering will request a waiver of PT and confirmation that a permit will be granted to transport the member in accordance with Section of the General Statutes from the Oversize and Overweight Permits Section.
If sufficient justification exists, the Office of Engineering will request confirmation that a permit will be granted to transport the member in accordance with Section of the General Statutes from the Oversize and Overweight Permits Section. This special provision addresses the shipping of materials in accordance with the Connecticut General Statutes and the Department s Policy Statement PT If a member exceeds the height and width limits of the General Statutes or the length and weight limits of PT, and the Oversize and Overweight Permits Section confirms that a permit will be granted in accordance with Section of the General Statutes to transport the member, the project s contract documents should indicate that the Department will grant a permit to transport the oversized item.
These features may include a shelf at the face of the abutment stem, ladder stops on slopes, catwalks, ladders, access doors in bottom flanges and the ends of box girders , hand rails and cables, lighting and electrical outlets, and any other facility necessary for the inspection of the structure. The features may also include the design and placement of structural members and components such as generous bridge seats for box girder structures, internal cross frames and bracing in box girders that allow access for bridge inspectors.
For bridges that are excessively wide, where normal inspection equipment cannot access the interior members, the bridge may require permanent movable inspection platforms or permanent catwalks. The need for and type of permanent inspection platforms shall be determined by the Bridge Safety and Evaluation Unit Notice to Bridge Inspectors As a result of a recommendation in Administration Memorandum No.
This information shall be contained in the Notice To Bridge Inspectors block. The manual should contain the instructions, procedures, check lists, diagrams and details necessary to 19 perform a complete in-depth inspection of the various members and components of the bridge. Inspection manuals shall be submitted with the Final Plans for Review. A note indicating that an inspection manual is available for a bridge should be placed in the Notice to Bridge Inspectors block on the General Plan Inventory and Operating Load Ratings Inventory and operating load ratings shall be determined for all new and rehabilitated bridges carrying vehicular traffic.
For the requirements noted below, rehabilitated structures that include a superstructure replacement shall be considered to be new structures. These rating shall conform to the following: Load ratings shall be performed using the Load Factor Method as set forth in Chapter 7 of the Department s Bridge Inspection Manual, as revised. Load ratings shall be performed using the following approved Load Rating Software.
Morth standard drawings for bridges
The P truck weighs , pounds and is on eight axles. The P truck weighs , pounds and is on nineteen axles. The rating factor for rehabilitated bridges may be less than 1. The following components shall be rated for load carrying capacity: 1. All types of main superstructure components, such as stringers, floor beams, box girders, adjacent box beams, etc. Piers caps and columns that have only one or two columns and all steel and timber substructure components.
Timber and steel decks. Concrete decks shall not be rated. When there are a large number of components that make up a structure, the components should be compared and the weaker or controlling components selected and analyzed.
A minimum of two of each type of component should be analyzed, one of which represents the capacity of the low speed lanes. The inventory and operating load rating analysis and a summary of the results shall be submitted with the final documents for review.
For hand computations, each sheet shall have a heading with the following information: designer s name or company, the subject computation for , State project number, designer s preparer s initials and date prepared, checker s initials and date checked, and sheet number. The headings of all computation sheets shall be filled in and complete.
The use of computers and computer software applications as a tool in the performance of design computations is acceptable. The designer is fully responsible for all his computations performed either by hand or by computer software applications.
For hand computations, the sources of all equations, values, constants, magic numbers, charts, graphs and other supporting data used in the design shall be referenced on each and every computation sheet that its use appears on.
When computer output is included in the design computations, it shall be selfexplanatory. If the output is not self-explanatory, an explanation or documentation of the output must be included in the computations and be referenced on all output sheets. All design, quantity and load rating computations shall be bound separately for individual bridges or structures and include a cover, title sheet, and an index.
All computations shall be submitted with the Final Plans for Review Quantity Computations General Once the plans are essentially complete, individual quantity computations shall be made for all items shown on the plans. The computations shall be complete and 23 accurate and arranged in an orderly fashion so that a person examining them will be able to follow the calculation sequence.
All items shall be clearly labeled. Sketches may be used for clarity. All quantity computations shall be made entirely with US Customary units. Quantity computations shall be prepared in accordance with the Method of Measurement and the Basis of Payment of the specification that describes the work.
The result of a computation shall be a whole number value. The units of the value computed must agree with the Basis of Payment. Care shall be used in rounding values.
Unassigned amounts shall not be added arbitrarily to any quantity computations. Quantity computations shall be furnished to the District Construction Office having jurisdiction over the work for use during construction Lump Sum Items If a lump sum item will be specified more than once in a project or contract such as Structural Steel for two separate bridges , the item names should include site numbers in their description such as Structural Steel Site No.
The use of site numbers with lump sum items accurately defines the limits of work for those items in a project or contract. The site numbers shall be clearly designated on the plans and in the specifications. Unless otherwise directed by the Department, individual quantity computations shall be performed for the following lump sum items to obtain values with the listed units: Item Units Structural Steel Weight of Structural Steel lb Shear Connectors Estimated total number each Abrasive Blast Cleaning and Field Contingency items should not be included in the bid package.
In the past, these items have been used to establish a bid price for an item which may or may not be required for the construction work. At times, the Department has received extremely high bid prices for these low quantity items, and when there is an increase in the quantity, it becomes very expensive for the Department. The 24 Office of Construction prefers to negotiate prices when it becomes necessary to add items to a contract.
If the need for an item is definite, but the quantities are unsure, a quantity should be given that is large enough to attract a reasonable bid price. Token quantities should not be given.
It should not be regarded as fully complete. The following items, where applicable, should be submitted in the order listed to the Department for review and approval: 1.
Environmental Review of the site, 2. Railroad Clearance Diagram, 7. Final Plans for Review, Incorporation of Review Comments, and Final Submission. All pertinent backup data shall be submitted to facilitate the review process. This work shall conform to the latest edition of the Department s Drainage Manual Preliminary Hydraulic Study A Hydraulic Study is required if the structure requires work within the floodplain of a watercourse or stream with a watershed area exceeding one square mile.
All work within the floodplain must meet the requirements of Sections 13a, 22a and b through h of the Connecticut General Statutes along with the Department s Drainage Manual. If a floodway is established, every effort should be made to avoid encroachment into it. Note, certain activities, such as the construction of bridge piers within the floodway may be acceptable provided there is no increase in the with floodway watersurface profile for the base flood or the ten year flood.
Prior 28 to the preparation of a Structure Type Study, a preliminary Hydraulic Study must be prepared and submitted for review and approval. If Stream Channel Encroachment Lines are established, they should be shown on the plans Scour Analysis The potential for scour at bridges over waterways must be evaluated and submitted to the Department for review and approval.
Substructures for bridges over waterways shall be designed to safely support the structure subjected to the design scour. Substructures, subjected to scour shall be designed with pile foundations, foundations on rock, foundations located below the maximum estimated scour depth, or any other means approved by the Department, provided adequate scour protection is maintained.
The preferred foundation types are pile foundations and foundations on rock Structure Type Studies Structure Type Studies shall be prepared for each new highway, pedestrian and railway crossing. The studies should consider the safety, serviceability, maintainability, constructibility, permit requirements, economics and aesthetics of the proposed structures.
The studies shall be developed after careful appraisal of the site conditions, foundation conditions, hydraulic and drainage conditions, design discharge and scour potential, coordination with DEP fisheries, rights of way, utilities, and highway limitations including maintenance and protection of traffic and environmental impacts both present and future.
Additional studies may be requested if the Department finds the original proposals unsuitable or inadequate.
BRIDGE DESIGN MANUAL
Multiple studies done just for quantity are not desired but only those studies that show promise or feasibility within the parameters herein should be pursued. For a group of bridges in a contract, structure type should be similar so that similarity of construction details may result in economy of costs. Repetition of a structure type merely for ease of design is to be avoided. Attention to detail in the appearance of the structure is to be kept foremost in mind.
New materials and developments may be incorporated into the design of the proposed structure with the prior approval of the Department. Where the structure is required to have more than one span, the resulting multi-span structure shall be designed as continuous to eliminate the need for deck joints. The structure type studies shall incorporate or otherwise resolve all requirements and constraints from applicable studies, reports and analysis developed by groups both within and outside the Department for the crossing location.
The structure studies are to be prepared in a pamphlet form on letter size sheets. US Customary units of measurement shall be used in all studies.Roads and Maritime Services Standard Bridge Drawings are designed for use by all personnel carrying out work for Roads and Maritime-funded bridges or bridges that will become the property of Roads and Maritime in the future, with the aim of ensuring consistency of content and presentation of all drawings for the construction of new bridges or the rehabilitation, maintenance or widening of Poster Print of Standard Drawings.
For hand computations, the sources of all equations, values, constants, magic numbers, charts, graphs and other supporting data used in the design shall be referenced on each and every computation sheet that its use appears on. All details shall be drawn to scale. FL: Personal Health Trac. The mission of the Arkansas Department of Transportation's Bridge Division is to provide plans and specifications for safe, efficient, cost effective, and aesthetically pleasing structures, evaluate existing structures for safety and function and manage and monitor present and future needs of existing bridges.
Earlier or later editions can be The Florida Senate.
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