Laserfiche WebLink
<br />Longitudinal Support Beams _ <br />As previously discussed, any manufactured <br />home requiring perimeter blocking must be sup- <br />ported by a longitudinal support beam. While the <br />chassis I-beams of the manufactured home are <br />connected to the horizontal support beams the <br />longitudinal support beams may also be subjected <br />to lateral wind loads. These loads are transferred <br />to the connection of the longitudinal support beam <br />to the post as shown in Figure 4.54. <br /> <br /> <br /> <br /> <br />. <br /> <br />. . <br /> <br />Figure 4.54 Longitudinal Support <br />Beam Loading <br /> <br />At each longitudinal support beam and vertical <br />member connection two lag screws at one half <br />inch by five inches should be used as shown in <br />Figure 4.55 to maintain the structural stability of <br />this connection. <br /> <br />D. ADDITIONAL DESIGN <br /> <br />CONSIDERATIONS <br /> <br />Having determined which siting and elevated <br />foundation design will withstand given conditions, <br />it is necessary to identify other construction and <br />siting considerations which must be considered <br />in implementing any elevated foundation design. <br />These include such items as set-up, enclosures, <br />utilities, location of mechanical equipment, and <br />access/egress to and from the manufactured <br />home. <br /> <br />Jacking <br />Jacking is the typical technique to elevate a <br />manufactured home onto a foundation system. If <br />the foundation must be placed in the ground, the <br /> <br /> <br />, <br /> <br /> <br />Figure 4.55 Longitudinal Support Beam <br />Connection <br />foundation should be constructed first and the <br />manufactured home elevated to its planned height. <br />Equally spaced hydraulic jacks may be located <br />under the steel frame adjacent to the planned <br />foundation points, which are then moved under <br />the home. A minimum of eight jacks should be <br />used with additional jacks provided as follows: <br /> <br />Jacks required = W x L x 20 Ib./ft.2 <br />C <br /> <br />Where: W = Width of home (ft.) <br />L = Length of home (ft.) <br />C = Jack capacity (lb.) <br /> <br />Maximum jack extension is also a consideration. <br />Where the elevation height exceeds the jack <br />extension, a two step procedure consisting of jack- <br />ing, blocking and jacking on top of elevated pads <br />may be required. Temporary steel beam supports <br />are then run perpendicular to and underneath the <br />home's I-beams. They extend across the actual <br />foundation site and are supported on both sides. <br />The home is then moved across these beams <br />lowered onto and secured to the elevated <br />foundation. <br /> <br />68 <br />