Forest Road Engineering Guidebook - Ministry of Forests

Forest Road Engineering Guidebook
• any other pertinent information: Is the site currently accessible by road?
Are there road or bridge restrictions on load length or weight? How can
these be overcome? If test drilling seems likely, how much work is
required to get a drilling truck (usually not all-wheel drive) to the site?
• if equipment fording will be necessary for construction, information
about possible ford locations and other considerations such as depth of
stream at that point, bottom material, and access gradients
If a fish stream is involved, the Fish-stream Crossing Guidebook (B.C.
Ministry of Forests 2002) should be consulted for additional site requirements.
Construction drawings and specifications
General arrangement drawings are the outcome of the design process and
show the location, composition, and arrangement of the proposed structure in
relation to the crossing. Site plan and profile drawings are design aids from
which a proposed design is developed; they are not general arrangement
drawings.
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A set of construction drawings consists of the general arrangement drawings
supplemented with detailed superstructure and substructure drawings and
other fabrication, material, and construction specifications. Shop drawings
are prepared by material fabricators to detail, and in many cases complete the
structural design of bridge structure components. These drawings will form
part of the construction drawing set and should be retained as part of the asbuilt
documentation. The complete construction drawing set should provide
comprehensive details on the location, composition, arrangement, design
parameters, and fabrication, materials, and construction specifications for the
specific proposed structure and is intended to be an integral part of the planning
process, completed before construction begins.
Typical scales for bridge and major culvert design and construction drawings
are 1:200, 1:100, and 1:50. The construction drawings should clearly show
all construction details and enable installation in general conformance with
the design intent. Where appropriate, a smaller scale should be used for
greater detail.
General bridge arrangement drawing requirements
General arrangement drawings should clearly depict the proposed components
and configuration of the bridge or major culvert in relation to the forest
road, stream, and stream banks. These drawings may also be used during the
agency referral process. Further details can be found in the Forest Service
Bridge Design and Construction Manual.