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adding deck joists

how to make an old deck safe - fine homebuilding

the lateral connection joins a deck joist to a joist inside the house. two connections per deck are all that’s needed. after running the bolt or rod from the inside out through the ledger, position the deck-joist hardware and screw it in place. add a bead of sealant to waterproof any gap between the rod and ledger. solution:

sistering deck joists: the only guide you’ll ever need

adding a second joist along the full length of another is also known as doubling up, or a double joist. the two planks should be similar dimensions and be fastened securely together from both sides. another way to sister is to attach a length of similar lumber along 1/3 or more of the length of an existing joist or rafter.

learn how to protect your deck joists by finding out what ...

seal your deck joists, rim joists, beams, and ledger boards with acrylic or butyl joist flashing tape. joist or flashing tape can be applied directly onto the deck joists when there's a new deck construction or a removal and replacement of old, worn-down deck boards.

deck joist spacing & blocking: proper techniques |

deck joist spacing should never exceed 16” on center (with the exception of max deck boards, which allow for maximum 24" on center). for a more rigid feel, 12” or less may be preferred. if adding additional framing, be sure to keep all boards level and in plane across the tops.

how to extend a deck | ideas & advice | diy at b&q

this is simply a matter of adding on another sub-frame. if your extension runs over a downward slope, you can accommodate the change of level by adjusting the length of the joist support posts - and maybe installing a set of steps to lead down to the garden. to extend your deck up a slope, you can start the new sub-frame on top of the last.

how to add blocking between deck joists - fine homebuilding

8. mark the joist at the other end in the same manner and snap a chalkline along the joist tops. 9. square down from the chalkline on one side of every joist to provide a reference line for installing the blocking. 10. through-screw the blocking where possible. use at least two screws per end to secure the blocking. 11.

how to install blocking between deck joists | diy deck plans

leave outside joists for last and install blocking from underneath. on a low deck, where blocking cannot be installed from underneath, stretch a string from the house to the outside edge along each outside joint for a reference.

deck blocking and bridging | decks.com

blocking or bridging can be used for a variety of purposes in deck building. probably, the most commonly used technique is to install small pieces of material in a zig-zag pattern between the perimeter joists to create a rigid rim joist that prevents bounce and increases the strength of the rail attachment.

adding joists to an existing deck - home improvement forum

adding joists will go a whole lot easier with the decking removed. crown the lumber so that the bow goes up. the new joists may need to be notched slightly or the hangers installed a bit lower to account for the difference in material height from old to new.

angled corner and joists | better homes & gardens

assemble the outside frame as you did when you laid out the deck, set it on the beams, and attach the rim joists to the ledger. check for square, then anchor the rim joists to the beam with screws. to mark the angled cut line, measure out from the corner an equal distance in both directions.

strengthening a deck for a hot tub - decksgo.com

strengthening a deck for a hot tub. by bob i have an 12x24ft deck,5/4 decking with 2x8 floor joists 16oc. i'm going to put a hot tub on the deck, on one end. i used your deck load calculator (excellent tool by the way)to add more support piers. i also want want to add more floor joists in the hot tub area.

installing new deck boards over a solid, existing frame ...

replacing deck boards on a solid frame is a relatively easy project, but you still need to plan ahead. because the deck boards are cantilevered beyond the joists, noting where the original edges were is important if you want to get back to the same deck dimensions.

saving old joists with joist caps | professional deck builder

about half the deck jobs we do are rebuilds of existing decks. unless the existing joists are very warped or decayed, we try to reuse the frame. unlike new joists that have intact tight grain, however, old joists are punctured with hundreds of holes from the old decking and often have grain cracks opening up on the tops.

sistering or joining joists | decks.com

sistering joists is commonly used when adding onto an existing deck or repairing a deck. in these cases, the overlapped joists help tie the framing together by combining the rigid members over a beam. the longer the overlap distance, the stronger the connection. you should overhang at least a couple of feet on each side of the beam.

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