49115 Facade Engineering Assignment 3 (Design Strategies) 10% of subject assessment BACKGROUND You are a graduate structural engineer (congratulations ! ), and the consulting firm that you are employed by has a good client that happens to operate a brewery. The brewery site contains an old brick building, built around 1900, which is shown below: This building is in the way of a new proposed truck pickup/loading dock. To overcome this obstacle it is proposed to construct a new portal through the external walls of the building to allow the trucks to drive under the building. To complicate things further, a new electrical substation needs to be installed in the building as well, next to the truck portal. As a result almost the entire bottom of the building will need to be underpinned. The external wall is loadbearing brickwork, 350mm thick at the top, gradually becoming thicker down the wall (to carry the increasing load). At the bottom the wall is 820mm thick. The support structure for the new portals must be within the building footprint, as the front of the building is a public footpath. Substation Opening Truck OpeningYour Director has come up with the following underpinning scheme: Framing Scheme (per portal) Framing Scheme (cross section) In effect, a steel portal is to be built inside the wall, then holes are to be punched through the walls to allow steel needles to be installed. The flat jacks above each needle are then to be loaded to the equivalent load of the supported brickwork and floors above, to preload the steelwork so that it does not suddenly deflect during the demolition process. After the jacking is complete the brick wall is to be demolished to create the new entries, and the steelwork is all concrete encased. Hydraulic Flat JackTHE REVIEW You have now carried out the structural calculations and sketches for this simple (but very heavy duty) underpinning scheme. However you are concerned that, given the loads involved, there is a serious risk of injury/death if something goes wrong. You go to your Director and ask for a review of your design, to check if you got it right. Your Director looks at your work and says that you are far from finished ! He says that you need to consider the “big picture” and identify all the steps that need to be carried out to “get it right” (i.e. a successful underpinning project). Then he will look at it (if he has time). ASSIGNMENT Your assignment is to summarise the key tasks that you will put in place to “get it right” during the: - Design/Documentation Phase; - Fabrication Phase; and - Construction Phase. NOTE: This is NOT a calculation assignment. Your task is to identify the checks and precautions that you will undertake during each phase to ensure that the underpinning work is successful, and you do not end up with the wall collapsed in the street ! In simple terms you need to identify what you will do during each phase (Design, Fabrication, and Construction) to ensure you “get it right”. The picture below is the underpinning work nearing completion. The workers finishing off the demolition work will go home to their families that night safe and sound, because they know that the structural engineer (YOU) know what you are doing and that you “got it right”.Assignment Specific Requirements This is an individual assignment (no groups). The assignment is to be 2 pages maximum. Under the headings of Design/Documentation, Fabrication, and Construction you are to present (in bullet point form) the tasks that you believe should be undertaken, why they should be undertaken, and how you will communicate those tasks to key stakeholders. For guidance, you should be able to identify at least 4 tasks under each heading, and if you think hard about it you might get up to 8 to 10 tasks under some of the headings. You are free to talk to each other, to other lecturers, and to co-workers to help you form your views. You can email any queries to me. WARNING: If you hand in an assignment that starts talking about how important it is to have a safe design, or start writing about safety in design principles, then I will give you zero (0) as a mark. This is assignment is not about how many useless “motherhood statements” you can quote from Google. This assignment is about identifying the specific tasks that you will carry out to make sure that your design does not kill someone. Submission Assignments are to be submitted to me by email, by no later than the start of the lecture on the 2nd of June. I will send a reply email to acknowledge receipt of each submission. Assignments submitted after 6pm will not be accepted. During the beginning of that lecture I will go through the answers. Finally, if you want to have a look at the final construction for inspiration, it is 5 min walk away (across the road at the old brewery site):