Usfs timber bridge manual pdf

A simple, inexpensive, 12footlong sawn timber bridge that was designed for an allterrain vehicle atv trail is also suitable for horse, bicycle, and pedestrian trails that cross small drainages. The unified facilities guide specifications ufgs are published only in electronic format and are intended to be used with specsintact software. Sale and disposal of national forest system timber 36 cfr part 223. Standard drawings, or example drawings, are intended for informational purposes only.

The bridge deck is not designed to carry the vehicular loads. Hand calculations based on usfs timber bridge manual reference bridge design procedure prepared by mark ferry define basic bridge configuration and design criteria see step 2 select beam combination symbol determine deck dead load and dead load moment determine live load moment determine beam size based on bending. See nc forestry bmp manual for culvert sizing recommendations. Allowable code design stresses are based on the strength of. Design of longitudinal deck superstructures pdf chapter 9.

The course was presented to more than 140 participants in minnesota and iowa. The timber bridge manual is a reference document only. Timber bridges forest products laboratory usda forest service. Maintenance activities are divided into categories that vary in definition and scope among different agencies.

Evaluation of a microdrilling resistance tool hdr engineering. Page 379 new time effects factor c new time effects factor c dd 2. Russ moody and alan freas retired of the usda forest service, forest. Department of agriculture, forest service, em77008. Please read all component manufacturers owners manuals provided with your rv and file appropriate individual warranty cards as required. All exposed soil at existing or new crossings will be stabilized with any one or combination of the measures recommended in the nc forestry bmp manual. The following information is provided for reference only. Department of agriculture, forest service, forest products laboratory.

Minnesota department of transportation exclude pdfs minnesota department of public safety driver and vehicle services. While many of the original timber bridges have been replaced with concrete and steel structures, timber is still a significant component of this countrys bridge stock. The fundamental principles of timberframed housing are also explained. An overview of timber bridges transportation research board. Beam superstructures consist of a series of longitudinal timber beams supporting a transverse timber deck. Timber bridges once formed a major part of new zealands roading network. Update on activities of the ascesei timber bridges committee. Read the manual to determine appropriate design and construction specifications for bridges on forest service roads. The majority of the timber design requirements in aashto are based on the national design specification for wood construction nds. As a timber bridge foreman, kevin had extensive handson experience with main roads timber bridge maintenance in central queensland, working for roadtek, central district. Hoosier nf timber management timber harvest sales conversion of nonnative pine to native hardwoods improve forest health and diversity wildlife habitat creation and maintenance regeneration of oakhickory, maintenance of barrens providing forest products to support local economies timber target generally 3 4 mmbf year since 2010.

Missoula technology and development center, usda forest service. Forest inventory and analysis national program timber. Handbook on structural timber design to eurocode 5 is en. This manual attempts to show builders the good practice of producing houses so that these houses can perform in a manner as expected of a good timber house. Properties of wood and structural wood products pdf chapter 4. Topics include the preparation of engineering drawings, bridge fabrication, handling, transportation, storage, and con struction. All bridge drawings should be approved for each specific bridge by a qualified engineer with trail bridge design experience. As part of the usda forest service, northern research station, forest inventory and analysis nrsfia mission is to provide comprehensive assessment of the past trends, current status, and future potential of the regions forest. Timber truss bridge comprises timber members bolted together. Handbook on structural timber design to eurocode 5 is en 199511 rules including strength capacity tables for structural elements james harrington1, malcolm jacob and colin short 1 james harrington and associates, four one the rise, mount merrion, co. The objective of timber cruising is to provide reliable estimates for timber appraisals. The ufgs master uses the latest csi masterformat, therefore, as of january 2012, the ufgs working group decided to discontinue support of masterformat 1995. For the purpose of these guidelines, road construction includes excavation of gravel quarries and borrow pits.

The timber volume estimate serves as the basis for payment on tree measurement sales or for bidding on scaled sales. Finally, researchers described techniques for using inspection tools in the timber bridge inspection manual, which supplements minnesota dots bridge inspection field manual. The national forestry handbook nfh contains methodology, procedures, and related reference. Pdf several changes relating to timber bridges have been incorporated into the. The standard drawingsdesign aids have been designed and developed in accordance with forest service manual and forest service handbook directions. Timber sale, stewardship, and forest products contracts and permits.

Bridge inspection inspection guidance manuals mndot bridge and structure inspection program manual 2019 pdf 35 mb mndot. Discussions are general in nature and are applicable to most timber bridge types. In practice, all maintenance is either preventative or remedial. In this chapter, timber bridge maintenance is divided into the three following categories. En 19952 timber structures bridges eurocodes background. Timber sale, stewardship, and forest products contracts. Bill woodward, usfs guidelines for highways on bureau of land management and u.

Standard plans for timber bridge superstructures forest service. For the past 20 years, beam bridges have been constructed almost exclusively from. These regulations establish access requirements for mining claims. The final rule reflects the views and concerns of thousands of people who expressed interest during the rulemaking process, which ran from october 2006 to. Section 8 covers the preservative and protective treatment of all timber bridge. You have joined an elite group, and as you begin making great memories using your new forest river rv, we. Page 1 travel trailer owners manual begin the journey. Guidance for the use of these forms can be found in forest service handbook fsh 2409.

The timber products output tpo group conducts research to estimate and track timber. Ibach chapter 14 contents wood preservatives 142 oilborne preservatives 142 waterborne preservatives 149 preservative effectiveness 1412 effect of species on penetration 1412 preparation of timber for treatment 1417 peeling 1417 drying 1417 conditioning of green products 1418 incising 1418. Forest river travel trailer owners manual pdf download. The standard drawings can be downloaded, in pdf file format. National forestry handbook preface the national forestry handbook, as a subdivision of the nrcs directives system, includes parts 635 through 638. Preservation and protection of timber bridges pdf chapter 5. Foia request usda departmental foia officer 1400 independence ave.

National bridge inspection standards 23 cfr part 650, subpart c. Design and construction of the pochuck quagmire bridge a suspension timber bridge also. All steel portable bridge docx all timber portable bridge docx timber deck materials docx. This chapter addresses proper techniques and procedures for timber bridge fabrication and construction. The trail bridge types, decks, rail systems, and abutments sections contain sketches, pictures, example andor standard drawings, and guidelines for appropriate use with the usda forest service recreation opportunity spectrum ros classifications. Wacker, forest products laboratory, usda forest service, one gifford pinchot. Both hs20 and hs25 loadings are included, along with l360 and l500 deflection criteria.

The photographs and construction details in this tech tip originate from a project completed at the tombigbee national forest, mississippi, by trails unlimited, a u. Usda forest service fsgeodata clearinghouse download. These regulations govern road construction related to forest service timber sale appraisals and contracts. Basic timber design concepts for bridges pdf chapter 6. Research pays off innovative inspection devices help. Usda forest service, engineering staff, washington office. Tracking aashto code issues impact dynamic load factor equal to 1. Forest products laboratory one gifford pinchot drive madison, wi 537262398 phone. The bridge material templates are living documents and it is recommended that the latest templates be accessed and utilized when ordering bridge materials or developing contracts with bridge material supply phases. The standard drawings can be downloaded, in pdf file format, from the table below. Forest service usfs correspondence handbook style manual, 2005, 2007. The manual comprises eight sections, encompassing the maintenance and rehabilitation of all timber bridge types including trusses, beamgirder spans, stress laminated bridges, concrete overlays, timberconcrete composites and includes timber substructures.

The forest service sells timber and special forest products on a variety of contract and permit forms based on the complexity andor value of the sale. They are constructed of glulam or sawn lumber components and have historically been the most common and most economical type of timber bridge figure 71. A comparison of us and canadian bridge codes authors. Forest service lands arizona department of transportation arizona department of transportation adot federal highway administration fhwa bureau of land management blm united states forest service usfs 2008. This manual is dedicated to kevin collet who passed away on 24th august 2003. Canadian bridge design codes, highlighting similarities and differences that relate to. His knowledge and expertise in timber bridge work has been of invaluable assistance to bridge.

In the forest service, handrails are required on all bridges unless an analysis design warrant shows that the risk of falling off the bridge is minimal or the trail itself presents a higher risk. James scott groenier, missoula technology and development center, usda forest service, 5785 highway 10 west, missoula, mt, 59808. The format is intended to allow flexibility for additions and updates. Dolt hole, diameter in timber 16 16 16 1516 washers, standard round, cast or malleable iron, diameter 3 3 3 312 round, wrought iron, minimum diameter 2 2 2 214 thickness 532 532 532 1164 square plate. Trail bridges range from a simple foot bridge with a handrail figure 62 to multiple span, suspended, and truss structures. Design, construction, inspection, and maintenance, u.