A foundation slab is a large, flat, and thick concrete structure that serves as the base for a building's foundation. It is typically poured directly onto the ground and provides a stable and level surface for the rest of the building to be constructed upon. Foundation slabs are essential for distributing the weight of the building and preventing settling or shifting of the structure over time. They also provide a barrier against moisture and help to insulate the building from the ground. **

To connect the new concrete floor slab to the old floor slab using the joint edge, a keyway joint can be created. This involves cutting a groove into the joint edge of the old floor slab where the new slab will be placed. The new slab will then have a corresponding key or tongue that fits into this groove, providing a secure connection between the two slabs. This method helps to prevent differential movement between the old and new slabs and ensures a smooth transition between the two surfaces. **

The new concrete floor slab can be anchored to the old floor slab using the joint edge by using a dowel bar system. This involves drilling holes into the old floor slab along the joint edge and inserting dowel bars into the holes. Then, when the new concrete floor slab is poured, the dowel bars will extend into the new slab, providing a strong connection between the two slabs. This method helps to ensure that the two slabs act as one cohesive unit, preventing any differential movement between them. **

The trenches for connections to the foundation slab typically come first before the foundation slab is poured. This is because the trenches are dug to accommodate the necessary plumbing, electrical, and other connections that need to be in place before the concrete slab is poured. Once the trenches are dug and the connections are in place, the foundation slab can then be poured on top of them. This ensures that the necessary infrastructure is in place before the foundation is constructed. **

A garage floor slab is a solid, flat surface made of concrete that serves as the foundation for a garage. It is typically poured directly onto the ground and provides a durable and level surface for vehicles to park on. Garage floor slabs are designed to withstand the weight of cars, trucks, and other heavy equipment, making them an essential component of any garage structure. **

A cremation grave slab is a flat stone marker that is placed on top of a burial plot where cremated remains are interred. It serves as a memorial and a way to mark the location of the cremated remains. The grave slab may be inscribed with the name, dates, and other details of the deceased, providing a lasting tribute to their memory. These grave slabs come in various materials and designs, and are often personalized to reflect the individual being commemorated. **

One strategy for coin pusher machines at the fair is to focus on pushing coins that are already hanging over the edge. By targeting these coins, you increase your chances of causing a chain reaction that pushes more coins over the edge. Another strategy is to aim for the sides of the machine where the coins are more likely to fall off. It's also important to pace yourself and not continuously drop coins too quickly, as this can be less effective in pushing coins over the edge. **

It seems like there might be a typo or a misunderstanding in the question. It is unclear what is being asked. Can you please provide more context or clarify the question? **