You will be happy to know that my graphical models are nearly ready to be delivered. I have considered how to do Mindful Modeling, what to do about Objects within my graphical models, and even had not one round, but two rounds of COBie consideration. I thought I had considered everything I needed to. However, I’ve realized that I haven’t really considered one of the most important deliverables; my drawings.
For this project, I wanted to create several drawings including the plans, elevations, and sections. To be appropriate for my house (where I have no large format plotter) I have opted to use A3. Now A3 has a standard size, defined in ISO 216 as 297x420mm. Ok, so I know how big my paper is; but how big should the drawing border? Well, there is a standard for that too.
ISO 5457 states that the drawings space for an A3 sheet is 277x390mm giving 10mm of clearance on each side, except for 20mm horizontally on the left to allow for filing. It also states that drawing sheets should have centre lines, a grid reference for identifying locations on the drawing, and trim markings in the corner; giving me a sheet that looks something like this:
Right, I have my drawing sheet, I now need a title block to go with it. Luckily for me, there is a standard for that too. ISO 7200, specifies the mandatory fields required for a title block which are:
- Legal owner
- Identification number
- Date of issue
- Segment/sheet number
- Approval person
- Document Type
In addition to these codes, I want to include the following optional fields within ISO 7200: Revision Index, and Technical Reference, as well as the BS 1192 specific field Status Code, and the project’s name. So taking all of these fields and trying to put them together logically gives me a title block that looks like this:
Note: To better align with the approval gate process in BS 1192 I have changed Technical Reference to ‘Checked by’ and renamed Approval Person and Creator as ‘Approved by’ and ‘Drawn by’ respectively.
Now that I have an ISO 7200 title block, I can use this on all my drawings as well as my Employer’s Information Requirements, BIM Execution Plan, and model splash pages to consistently convey information about them all.
I also need to select the proper symbols and annotations. Luckily for me, there is even a standard for that too. BS 8541-2 includes standard symbols, annotations, hatch patterns, and even specifies what my north point should look like. Using this standard I can ensure that I convey my information in a nationally consistent manner.
Finally, no annotations are complete without a good font. Now when I first released this post I hadn’t considered a font and had just used Ariel (#Mainsteam) but through closer inspection of the standards came across ISO 3098 Series and the compliant ISOCP fonts. These have now been used to annotate my drawings.
Now that I have put all of these standards together, I am able to complete by drawing properly, which you can access following the links below:
And there we have it, by thinking about how I am going to produce my drawings I have been able to apply several international and national standards to produce a standard drawing sheet, title block as well as use standard symbols. A big help towards the completion of PLQ2.5!
2.1 What existing information is available?
2.2 Is there sufficient information to produce a BEP?
2.3 What is the layout of the house?
2.4 What assets are contained within?
2.5 What asset information can be linked to the graphical model?
Now that I have a system for producing each deliverable in place, It’s about time I shared them with you…