The Drafting Company You Have Been Looking For…
Our team of dedicated professionals at JP Drafting Ltd. is ready and equipped to provide the detailed drawings for your next project.
We provide your firm with competitive, accurate and easily interpreted detailing.
The time, hassle and money you save is important when you want to concentrate on what you do best...fabrication.
We have the knowledge & experience in the fabrication industry, along with completely automated state of the art technology. Our combination of this technology, automation and experience will assist your company’s production efficiency.
The New Generation in Intelligent 3D Detailing - XSteel
Tekla XSteel, is a 3D structural modeling system for detailing structural and miscellaneous steel. By using Tekla Xsteel the detailer creates a complete model of the steel structure including all the relevant information required for fabrication and erection. The model includes the structure’s geometry, dimensions, member properties, connection types and materials.
All drawings, material lists and bolt lists are produced automatically from the model together with data for CNC machines. The model of the structure is created by the detailer who specifies the layout of the structural elements and associated connections. All elements within the product model - beams, columns, plates and bolts are intelligent objects. For example, when the size of the beam is altered, dimensions of adjoining connections change accordingly. If the height of the building is altered, Tekla Structures will generate updated drawings and material lists.
The interactive ‘true’ 3D approach of Tekla XSteel enables the model to be easily revised with instant on-screen display of changes to the model and associated connections.
All these connections are accessed by selecting graphical icons of the connection type and applying them to the structure by pointing at the relevant members. The detailer can modify any of the parameters available within a connection and see the result instantly on the screen. User defined connections can be created by drawing fittings and bolts interactively. Once created these connections can be used throughout the structure or stored for use in future contracts. Any modifications to the structure’s geometry are transferred to the connections. For example, if a member’s length or position is changed the relevant connections are modified automatically together with the detail drawings and material lists.
Tekla XSteel automatically creates erection drawings, fittings, lists and CNC data. And all of these items will be updated automatically should the content of the structure change.
The Benefit of 3D Drawings…
The use of 3D drawings is an enormous benefit to the personnel who use them. The instant visualization leaves nothing to be questioned when fabricating and erecting.
We provide detail drawings, complete with 3D Erection drawings. Our detailing packages include material lists for all parts and members, bolt lists, weight take-offs, area take-offs and complete cut lists for all items. Our automated drawing production allows for quick revisions in which all lists and connected drawings for the entire project will be automatically updated.
Let JP Drafting Ltd. quote your next fabrication job and find out how we'll make our technology and expertise work to your advantage.
Pre Detailing - A New Approach in Detailing
We have been at the forefront a paradigm shift in the industry wherein detailers work directly with the engineers rather than the fabricators. In this way, the contractor and/or fabricator need not be involved in the process until the engineer has a complete and accurate set of drawings. This eliminates extra money going to contractors and fabricators for change orders and allows for quicker project turn around, more competitive pricing and thus an increased market share.
In the 1950s, the majority of steel fabricators ran their own drawing offices. This process began to change in the 1960’s. Fabricators found it increasingly difficult to maintain the right balance of detailing staff – they had too many detailers when times were slow and not enough detailers to handle peak conditions. Sometimes fabricators could alleviate the problem by working together on large projects, but only temporarily.
The 1960’s in British Columbia saw the emergence of independent detailing companies. There have been many changes in the industry since then; more efficient ways of detailing, using advanced 3D steel detailing packages such as Tekla Structures have developed job costing models and automated status reports etc. One area where we still encounter major problems is with engineering drawings.
The engineer is constantly under pressure to complete his design and the fast-track nature of most projects nowadays adds to his difficulties. While steel detailers require definitive information to prepare shop detail drawings, engineers work with concepts. In most cases, the engineer may receive the preliminary design from an architect on a commercial project or receive direction from an owner on an industrial project. The design process is an evolving one, and architects and owners have a propensity to change their minds.
All too often, engineers on commercial projects prefer to leave dimensions off their design drawings because of the difficulty in implementing architectural changes in a timely manner. This procedure forces the steel detailer into a review of the architectural drawings, a process that is alien to what is spelled out in the CISC Code of Standard Practice, where it states all dimensions must be on the engineering drawings.
Many specifications in North America include a clause which states in part “Detail Drawings must be prepared under the supervision, and bear the seal of, a professional engineer.” This is a clause which is generally vigorously opposed by both the steel detailer and the fabricator. The detailer’s responsibility is not one of design but rather to interpret the drawings from the engineer of record in order to prepare the shop drawings for fabrication. According to many engineers of record, they believe the seal ensures that a responsible professional has looked at the drawings. The problem is that the engineer of record and his team receive too many poorly prepared steel detail drawings for review. The additional time spent reviewing poor shop drawings could better be used to keep the engineering drawings up to standard and within the engineer’s budget. There are areas where we, as detailers, need to clean up our act and pay more attention to accuracy and timeliness of steel detail drawings. Steel detailers need to understand the engineer’s problems and work with them to produce the working drawings for the project.
The steel detailing industry has arrived at a point in time where it needs a paradigm shift. The steel detailer could be more effective in the future as part of the design engineer’s team. The steel fabrication industry would be better served if engineering drawings are more complete, and if shop detail drawings are available at the bid stage. We believe we can get closer to this model if the detailer works closely with the engineer of record while the design is evolving.
There are, of course, both pros and cons to the steel detailer working for the engineer (or owner) rather than the fabricator. The time has come to re-invent the process of steel detailing.
- 1. Detailer has direct contact with the engineer addressing problems as they arise.
- 2. Faster response to Requests For Information (RFIs).
- 3. Changes only handled by detailer and not the fabricator, resulting in lower costs.
- 4. Design assist by detailer. Detailer can offer constructive comments on connection design and potential erection problems.
- 5. Expedite preparation of shop detail drawings.
- 6. Material take-off for estimating and job costing.
- 7. Advance order bills available at time of award.
- 8. 3D Model to examine clash check and clearances for equipment.
- 9. Detailing continues through bid evaluation.
- 10. First issue of detail drawings and hardware sheets available with fabrication award.
- 11. Engineer can use a number of fabricators to expedite project.
- 12. Engineer of Record has more control over the project.
- 13. Fabricator off the hook for detailing errors. (Detailer can carry Errors & Omissions Insurance.)
- 1. Fabricator may want different type connections. (This can be accommodated if recognized early enough in the process.)
- 2. Fabricator does not have full control of the detailing….this should not be a problem if fabricator receives shop drawings issued on schedule.
- 3. Fabricator may want to ship large components (Not a problem, as e.g., with Tekla Structures) assembly drawings can be quickly prepared to suit.)
Written by Hugh Dobbie Sr.