i'm planning to lay my decking perpendicular to the house instead of parallel. i've been through the dca 6 several times, and despite what our local code officer said, it's not clear how to figure out the specs for my beams and joists. table 3 in the dca is for joists framing from one side only.
framing a deck parallel to a house some decks are designed with a joist orientation parallel to the house. this is useful in cases where you do not want to hang framing members from the house wall.
northern composite products use a hidden fastener system called the slide and go fasteners which provides a screw free deck surface. the composite material manufactured by ncp is long lasting
non-composite deck: composite beams will be designed as non-composite if the deck on both sides of the beam is non-composite for any portion of the beam span. opening or exposed beam: a beam that spans through an opening or penetration or for which there is a portion supporting no deck, such as an inset beam, will be designed as non-composite.
the concrete slab can be either full depth or cast over formed steel decking, with rib orientation perpendicular or parallel to the beam. stud capacity can be calculated by the module using standard aisc procedure. normal or lightweight concrete may be used for both strength and deflection calculations.
composite girders parallel to deck span 2. break the deck at both sides of the beam/girder and provide z-shaped bent metal pieces to close off deck to the top of the beam/girder. this allows the erector to see the top flange so that he can position the studs correctly, otherwise a rib may interfere with stud placement.
if shear studs are used in the first parallel detail below, the deck does not need to be spot welded to the beam because the beam is laterally supported by the studs and develops composite action. if the studs are omitted and the deck spot welded to the beam, there is lateral support but no composite action.
the joists are running perpendicular to the home with the support beams running parallel. editor's comments changing the direction of decking boards on an existing deck, or a series of multi level decks is a great design technique that can really create subtle but distinct visual interest.
of steel-concrete composite beams using the recently adopted lrfd specifications1 are analyzed critically and the significance of several parameters is brought out clearly. charts are then constructed to facilitate the design of partially or fully composite beams using rolled-steel, wide-flange sections of a36 steel or a572 gr. 50 steel. the slab
composite beam design in ram sbeam. calculating effective flange width. the effective flange width is automatically calculated for the specified code based on the distance to edge or adjacent beam specified in the beam - composite command.. when calculating the effective flange width for bs 5950 for a simple beam with a cantilever, l z = l 3 - 0.3l 4, but l z 0.7l 3 see figure 3 therein .
2.17 number of shear studs that fit in a composite beam segment 2-55 . 2.17.1 solid slab or deck ribs oriented parallel to beam span 2-55 . 2.17.2 deck ribs oriented perpendicular to beam span 2-59 . 2.18 user defined shear connector patterns 2-63 . 2.18.1 specifying a user defined shear connector . pattern 2-63 . 2.18.2 uniformly spaced shear studs over the
usually the joists are at right angles to the house wall, it must be tied together other wise the deck can pull away from the house. in this way the decking boards run parallel to the wall. another factor is whether you will be shoveling snow from this deck in winter and will want a slight slope to make sure there is no ice buildup or water standing next to the house wall.
all but the tiniest decks have large horizontal beams resting on top of the support posts or piers. the beams, in turn, support all the floor joists. therefore, the structural integrity of the entire deck is dependent upon the condition of the beams. check the beams for large cracks and water damage.
so i am pretty sure the further end will not perfectly parallel to the house. it could be 1-2 inch off from one end to the other end. imagine a scenario like this: if i start to install the composite decking starting from the house, the one near the last board will end up like the red rectangle in the photo.
fig. 4 haunched beams: two types of haunches in the parallel beam approach, it is the secondary beams that span the greater distance. a very simple form of construction results as they run over the primary beams and achieve continuity without complex connections see fig. 5 . fig. 5. parallel beam grillage
a natural consequence of this floor system was the development of composite action between the steel beam and the concrete slab by means of shear connectors welded through the deck to the beam flange. there are two conditions to be considered. the first condition is when the corrugations of the deck run parallel to the beam.