h wrote: I'm laying a trex deck on a rubber roof with 2x4 sleepers.
what's the best way to anchor the railing posts?
the railing posts will be sleeves over PT 4x4
Sleeves? Made of what material?
the best idea I've come up with so far is pouring concrete
into a form that makes a 4x4 concrete column with a base that
extends ~8 in each direction under the trex planks.
also made a base out of 2x4s attached perpendicularly at the
base of the 4x4, but these tear through bottom of the 4x4 when loaded
any other ideas?
Well, I hope you own the roof! But seriously, Trex needs to be
supported every 12 inches, so your 16 inch concrete base idea would
allow the decking to sag in those areas. And they should be able to
stand up to a drunken stumble. Best way is through the roof, bolted to
the rafters, then repair the roof around each protrusion with cant
strips and a good flashing job. Can you lag your posts through the
fascia into the rafters? And, I'd run my sleepers parallel to the
direction of water run-off. Gluck. Tom