|Forum topic by mjtedrow||posted 05-22-2014 01:46 PM||1353 views||0 times favorited||2 replies|
05-22-2014 01:46 PM
I recently built a swingset with a 8×8x5ft high platform. I just added a 5-1/2×8x7ft high playhouse to it and Im starting to question if it is properly supported. The platform is built out of 2×6’s with joists at 19” on center. All the joists have joist hangers and they run left to right in the picture. Two of the four 4×4 posts are in the ground below frost grade. The platform is supported by the outer 2×6’s to the 4×4 posts. The upper front and back 2×6’s each have two 1/2” lagbolts, and the the other two have single 1/2” lag bolts with 2 lag screws like what is shown on the bottom 2×6’s.
Two reasons of concern are because I do get some side to side movement of the platform as well as there is a ever so slight bow in the outer two front and back 2×6’s. The other outer 2×6’s that the joists are attached to seem fine.
I am considering adding upper 2×6’s to the front and back to essentially sandwich the 4×4’s post between two 2×6’s with lag bolts. I was also going to add 2×6’s down the outer side of the 4×4 posts between the upper and lower 2×6 horizontal runs to add more support.
Let me know what you guys think and thanks for the assistance. I look forward to building a pre-engineered deck in the near future.