While these pavers are durable, drilling into them could potentially cause them to crack. It's generally not recommended to drill directly into pavers for mounting heavy objects. The existing holes are primarily for drainage and might not provide sufficient support for the weight and stress of a planter box and trellis, especially with wind and plant growth. You might consider alternative mounting methods like placing the planter box on a separate stand or using weights to secure it.

To calculate the amount of sand you'll need, you first need to determine the volume you want to fill with sand. Since you have twenty 16x16x2 inch stones, I'm assuming you're creating a space with those dimensions and filling it with sand. Here's how to calculate the sand needed: 1. **Calculate the volume of one stone's footprint:** 16 in * 16 in * 2 in = 512 cubic inches. 2. **Calculate the total volume for 20 stones:** 512 cubic inches/stone * 20 stones = 10240 cubic inches. 3. **Convert cubic inches to cubic feet:** There are 1728 cubic inches in a cubic foot, so 10240 cubic inches / 1728 cubic inches/cubic foot = 5.93 cubic feet. 4. **Account for settling and compaction:** It's recommended to add extra sand to account for settling. A common practice is to add about 10-20%. So, 5.93 cubic feet * 1.1 (for 10% extra) = 6.52 cubic feet or 5.93 cubic feet * 1.2 (for 20% extra) = 7.12 cubic feet. 5. **Determine sand bag size:** Sand is typically sold in bags of 0.5 or 1 cubic foot. Divide your total cubic feet needed by the bag size to determine the number of bags. For example, if using 0.5 cubic foot bags and adding 10% extra: 6.52 cubic feet / 0.5 cubic feet/bag = 13.04 bags. Round up to 14 bags. If using 1 cubic foot bags: 6.52 cubic feet / 1 cubic foot/bag = 6.52 bags. Round up to 7 bags. **Important Note:** Since the stones are only 1.75" tall (according to product details), a 2" depth might slightly overfill the area. You can adjust the depth in your calculations if needed. Also, always check the bag size when purchasing to ensure accurate calculations.

This 16x16 step stone weighs 39 lbs.

These pavers are fire-resistant, meaning they can withstand high temperatures without sustaining damage. They are a safe option for areas around fire pits or grills.

These step stones are designed for foot traffic only and may not be suitable to support the weight of a 500-pound generator. I recommend checking the manufacturer's specifications or contacting Pavestone directly to confirm the weight capacity. You may need to consider a more robust paving solution for your generator.

67 pcs but recomended buy some extras (5 or 6)

Wet saw, grinder w masonry blade, circular saw w masonry blade