I want to use post anchors on concrete, but concrete surface is slanted its not perfectly flat, what can done about it.
Welcome to the Bunnings Workshop community @sahirchamp. It's a pleasure to have you join us, and many thanks for your question about mounting a post.If the post is intended for a structural purpose, it's best to enlist the help of a professional to ensure the installation is done safely and correctly. In situations like this, a professional would typically either grind the slanted concrete to create a flat pad for the post anchor or build up a level surface using structural grout as a riser for the post support to sit on.
Both methods require proper technique and an understanding of the loads involved, so given the potential structural nature of the post, I strongly recommend getting a qualified professional to assist.Please let me know if you have any questions.Mitchell