# Building the cluster on BPI **Building the cluster** **Building the rack** I built a rack for the Banana Pi boards using blanking plates for mains sockets, and four large bolts. I made a wooden template from a piece of MDF, and used the template to drill holes in each of the banking plates. I drilled small holes for plastic PCB supports which I use to hold each board in place. The bolts are inserted through the holes at the corners of the blanking plates, and held in place with glue. more please see: --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://bananapi.gitbook.io/bpi-m1/en/buildingtheclusteronbpi.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.