Wood – What nails or screws to use to support 600 pounds max? Making tree house bed

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Im making this for my kids. I will post the video so you guys can watch it, and have an idea what im talking about. Just watch the video until minute 2:50 because thats all im doing. The rest will be different from the video..just want to know how much weight can i put on? And what nails or screws to use..? Any help please. Thanks in advance.

https://youtu.be/dR_cXIMiQ9Y

Best Answer

Common 3-1/2" gold construction screws (of good quality) are good for 50# or more each when used in solid lumber and penetration is at least 1-1/2". Dividing your bed into two ends, you'll need 6 screws per end to hit your load rating. Considering that you'll probably anchor it along the side as well, you'll have more than adequate support.

Do not use nails for anything that's not intended to be permanent, nor for anything where pullout resistance is critical.

Disclaimer: This assessment is based on several decades of construction and home ownership experience, and not any particular specification or product rating.