This specification describes the minimum requirements for structural steel drawings.

Transcription

1 1/7 1.0 PURPOSE This specification describes the minimum requirements for structural steel drawings. 2.0 GENERAL As stated in specification SPEC-0800, drawings are intended to be Design drawings. Sufficient layout, field investigation and design work must be done to prove fit and ensure sound design, showing enough information such that detailers can produce fabrication drawings. Generally, steelwork drawings fall under four categories: Buildings, Trestles, Conveyor Galleries, or Flues. The project drawings must include the "Steelwork General Notes" that indicate type of steel, floor material, specifications and any other information that may pertain to the job in addition to the standard specifications. Notes are available as a CAD cell from Vale s standard cell library. SPEC-14001, Steelwork General Notes, includes the correct standard material legend to be used on Vale structural steel drawings..0 STEELWORK FOR BUILDINGS Complete steelwork drawings in order to provide enough detail to construct the complete superstructure including; exterior walls, interior walls, floors, roof, with all structural and architectural details fully developed. For larger jobs and where applicable, arrange drawings in the following sequence: Anchor Bolt Plan Column Schedule Floor Plans and Sections Crane Girder Plan (where applicable) Roof Plan Elevations.1 THE ANCHOR BOLT PLAN Identify columns as per the building grid (building grid as determined per SPEC-08001, section 9.1). Show each column properly oriented and indicate the size, the base plate size, the underside of base plate elevation, the anchor bolt sizes, mark number, spacing, projection, grout thickness and load. Locate the building exterior grid lines in reference to the foundation or wall lines. Anchors bolts may be shown on the concrete drawings, but they are specified and located on the structural steel anchor bolt plan. References to the concrete drawings must be clearly indicated. See SPEC and Standard drawing D for more information.

2 2/ THE COLUMN SCHEDULE Typically, provide the following information on the column schedule: Column lines Column rows Floor levels Column sizes and length. Splice locations (tied into floor levels). Column design loading. Base plate sizes and directions. Anchor bolt sizes. Column design loading (Kips): o Dead Load o Live Load (other than snow) o Live Load Snow o Axial Loads (N.S. & E.W.) o Uplift o Shear Loads (N.S. & E.W.)

3 /7.2 FLOOR PLANS Normally single line diagrams show all steel framing at each level including: beams, columns, stairs, grating and/or checker plate flooring including thickness, (nominal) floor elevation, top of steel elevations and design loading. Show handrail as a phantom outline and labeled HR. Design loads must be indicated on the drawing including live loads, dead loads, and any additional loading such as concentrated loads from process upset conditions, mechanical loading, etc. Make an allowance for intermittent levels, where platforms and part floors can be shown between main floor levels (normally 10'-0" vertical). Title each floor plan as per the following example: Variations in the top of steel elevation are then shown in plan per the following example:. CRANE GIRDER PLAN Show all crane girders complete with crane rails, crane rail fastening details, trolley wire details, crane stops and crane access platforms. Where possible one drawing should be used to cover all the above. Title crane girder plans similar to floor plans..4 THE ROOF PLAN Show all framing, purlins, tie rods, bracing and any minor installations such as roof drains and roof openings where a separate plan is not required. Refer to standard roof details where possible rather than creating custom details. For flat roofs with roof drains, slope the roof to the drain. Where trolley beams and crawl beams are attached to roof steel, show in heavy dashed lines, indicating the size of the hoist attached to the crawl beam, and the Vale assigned lifting device number. Design loads must be indicated on the drawing including live loads, dead loads, any additional loading such as concentrated loads from snow piling, mechanical loading, etc.

4 4/7.5 ELEVATIONS Normally double line diagrams indicate all steel framing including columns, beams, bracing, girts, sag rods, hangers, window frames, door frames and any other misc. openings or attachments. Give beam nominal depth dimensions but do not include weight. Indicate all material such as brick and block, siding material, translucent panels, protection walls, etc. Show the size of all girts and sag rods. All finished floor elevations are primary with the top of steel in a secondary position. Indicate the differential dimension as well as both elevations. Title each elevation. Show enlarged details as required for items such as conveyor gallery and trestle entrances to exterior elevations. Usually these are covered on separate drawings and properly cross-referenced. In such cases, the portion that is shown in enlarged detail is not repeated on the small-scale main elevation, only depicted, to avoid error through duplication. 4.0 STEELWORK FOR TRESTLES AND GALLERIES Complete steelwork drawings for a trestle to provide enough detail to construct the complete structure including foundations, walkways, pipe installation, conveyors, etc. Arrange drawings in the following sequence: Plan and Elevation Bent Details Tower Details Miscellaneous Details 4.1 PLAN AND ELEVATION Plan Show all steel framing including beams, bracing, bents, towers, stairs, expansion joints and joint tied in dimensions. Show handrail as a dashed outline and labeled. Elevation Show below the plan view and indicate all the steel framing revealed by the section. Indicate all key points such as working points and base plate elevations. Number, in sequence, all bents and towers (e.g. bent #1, tower #1, etc.) and dimension in sequence to working point

5 5/7 4.2 BENT & TOWER DETAILS One or more drawings may be used to properly detail bents. These details are normally done in double line and include elevations of each bent. On long trestles with many bents, the tabulation method may be used. Indicate all material for columns, bracing and base plates, the slope of bent and any deck framing. 5.0 STEELWORK FOR FLUES (For reference drawings refer to C.C. Smelter Converter Flue Drawings E to inclusive). Steelwork drawings for flues, in general, follow the same pattern as "Steelwork Drawings for Trestles and Conveyor Galleries", that is, they provide enough information and detail to construct the complete flue including foundations, piers, and insulation. 5.1 FLUE PLANS AND ELEVATIONS Make independent plans and elevations of flue support steel. Indicate the outline of the support steel and cross-reference. These plans and elevations indicate the size and type of material used and show the location of expansion joints, anchors, sliders, manholes, test points, etc. Provide sections and details for the expansion joints, anchors, sliders, manholes and test points, and other such items as required. 5.2 FLUE SUPPORT STEEL Ideally, the plan and longitudinal elevation for the flue support steel is shown on the same drawing where possible. The plan includes all beams, bracing, walkways, and stairs and is drawn in single line. Show handrail as a dashed outline and labeled. The longitudinal elevation shows all the above and is drawn in double line. The outline of the flue appears both on the plan and elevation. Separate elevations are required at each column line indicating all material, walkways, stairs and handrail, etc. Provide any other detail pertaining to the support steel as required for clarity.

6 6/7 6.0 REFERENCE DOCUMENTATION The following documents are related to this specification and shall be used to their latest revision: SPEC SPEC-0800 SPEC SPEC SPEC D-Series D-Series D-Series E to D CISC Drawings Administrative Requirements Drawings Technical Requirements - General Drawings Technical Requirements - Concrete Design Structural Design Requirements Steelwork General Notes Stobie #9 Headframe Good Examples of Typical Steel Drawings Frood Stobie Mill Good Examples of Typical Steel Drawings CC Smelter - FBR Good Examples of Typical Steel Drawings CC Smelter - Converter Flue Good Examples of Typical Flue Steel Drawings Anchor Bolt Selection Guide Standard Practice and Fundamentals for Structural Shop Drafting

7 7/7 7.0 REVISION AND TRANSITION NOTES Revision notes describe: what was changed, and if applicable, why it was changed, and the plan to implement the change, including whether changes are retroactive. Note: The revision notes are a summary of the changes and may not necessarily be a complete list. A risk code is entered for each revision and if applicable, the revision notes will describe how risk was addressed for the revision. Risk Code A Risk Category This revision is a minor change and/or introduces no risk. B C Risk has been addressed for this revision by the reviewer and approver. Low risk or no new hazards identified. For this revision, a PHR or other risk management tool has been used to address risk and minimize hazards. This risk assessment has been documented and is available through Central Engineering. Rev 1 2 Revision Notes Document format and number changed due to Vale Engineering Document Program changes in 2011/2012. Previous Stand Number was Rev 9. This specification is part of a set of specifications that define the administrative and technical requirements for drawings. Some administrative content has been removed from this specification and inserted into the appropriate specification. Clarifications added regarding steelwork general notes. HR line type in Plan changed from dashed to phantom. Document Reviewed Format updated Snow live load added to column schedule information Risk Code Approved by Reviewed by Issue Date YYYY/MM/DD --- AA AD 201/0/ AA AD 2014/02/05 A A.Alaeddine A.Delost