STRUCTURAL DRAFTINGTYPICAL STRUCTURAL STEEL DRAWINGSDesign DrawingsThese drawings are prepared by engineers or architects. Design drawings show all information required to prepareall structural drawings. They indicate types of construction and contain data on loads, shear forces, moments, and axial forces. Information generally includes structural steel shape designations for each framing member, key dimensions showing center line dimensions locating beams and columns, end reaction loads, general notes, and north arrow for reference.Erection PlansErection plans are prepared by the structural drafter. These drawings show the location of every member or sub-assembly in the framework. The erection plans include plan views, elevations, sections, anchor bolt plans, and column base connection details. The scale for the erection plan is 1/4" = 1'-0" or smaller.Assembly marks are used to identify each structural framing component. They are used to name each steel component appearing on shop the drawings and will appear on the erection plans to show the position and locationof the structural member. Various systems of erections markings are used by different fabricating companies. A few examples of erections are as follows:C12 (2-4) The C is the designation identifying a columnThe 12 is the column numberThe (2-4) specifies the 2nd through the 4th floorsB3(4) The B is the designation identifying a beamThe 3 is the beam numberThe (4) specifies the 4th floorAnchor Bolt PlansAnchor bolt plans show the locations of all anchor bolts which will hold the steel frame to the foundations or footings. Generally the footings or foundation is dimensioned on the architectural drawings and are not shown on the structural set. The construction of the footings is not part of the steel fabricators work but the masonry plans may show certain items which the steel fabricator is required to furnish. These items may include anchor bolts, leveling plates, grilles, machinery supports, etc. which must be placed by the masonry contractor prior to the erection of the steel framing. An anchor bolt plan is furnished by the steel fabricator to the masonry contractor to show the field placement of the anchor bolts. The scale for the anchor bolt plan is 1/4" = 1'-0" or smaller.Column Base Connection DetailsThe column base connection details show the connection of the steel frame to the footings or foundation. The column base connection details only show the details from the top of the footings to the steel framework above. The scale for the column base connection details is generally 1 1/2" = 1'-0". The dimension for grout thickness, anchor bolt projection, and the elevations of base plates are shown.Detail SheetsThese detail sheets show the details of all the connections. These detail drawings show the relationship between connected structural members and the method of connecting the framing members. They include general assemblyand clearance dimensions and general notes for special assembly instructions. If the connecting beam were coped the clearance dimensions for the cope would be shown. Shop drawings are developed from the connection details. The scale for the details is generally 1 1/2" = 1'-0". A scale of 3" = 1'-0" is used for very small details.1STRUCTURAL DRAFTINGTYPICAL STRUCTURAL STEEL DRAWINGSShop DrawingsShop drawings are used by the steel fabricating shops to fabricate each structural component. All structural steel members that must be made (fabricated) must have a drawing detailing all information and dimensions needed to make the item. Shop drawings include all beams, columns, connection angles, and bill of materials. Each structural component is drawn separately and contains the necessary information the is required to fabricate the component. Shop drawings seldom picture any of the adjacent members that are connected to the member being detailed however, all features which have a bearing on the member must be investigated. Standards for shop drawings vary from on fabricating company to another but all generally use the AISC standards for structural detailing. The scale for the shop drawings is 1" = 1'-0".Bill of MaterialsThe bill of materials is a listing of all of the component parts of the steel framework, including all structural members, connection angles, and fasteners. It is prepared by the draftsman. The bill of materials is included on all shop drawings and generally lists only the information for the items shown on that sheet. It can also be placed on a separate sheet. Each structural member is listed separately in the bill of materials and includes information such as erection marks, quantity required, shape designation, length of structural member, size of any connected plates and/or angles, and all fasteners (shop and field).General NotesGeneral notes are shown on all drawings. General notes contain information pertaining to the job at hand. Information includes size of bolts, size of holes, type of paint, type of steel, and other information required by the shop. Typical general notes for design drawings:1. SPEC: AISC, LRFD, 13TH EDITION2. MATERIAL: ASTM A992.3. FASTENERS: 3/4 Æ A325-N BOLTS IN BEARING TYPE CONNECTIONS, THREADS IN SHEAR PLANES.4. CONNECTIONS SHALL CONFORM TO THOSE SHOWN IN AISC MANUAL AND SHALL DEVELOP END REACTIONS SHOWN ON DESIGN DRAWINGS.5. TOP OF STEEL ELEVATION 98'-6".Typical general notes for shop drawings:1. SPEC: AISC, LRFD, 13TH EDITION2. MATERIAL: ASTM A992.3. FASTENERS: 3/4 Æ A325-N BOLTS.4. HOLES: 13/16 Æ5. PAINT AS PER SPEC.Typical general notes for connection details:1. SPEC: AISC, LRFD, 13TH EDITION2. MATERIAL: ASTM A992.3. SHOP CONNECTIONS: 3/4 Æ A325-N BOLTS (BEARING TYPE).4. FIELD CONNECTIONS: 3/4 Æ A325-N BOLTS (BEARING