We have been doing EC based on construction drawings for a few years. All of these were houses or high end camps which has drawings. I would determine the LAG and HAG put that in seciton C2f & g then write the construciton drawing elev. in the comments section.
Now I am being asked to provide EC based on construction drawings for mobile homes which has no drawings. I am trying to figure out what the owner needs to furnish me. Have any of you run across this and what do you require.
[sarcasm]"Dust off your magic wand"[/sarcasm]
> Now I am being asked to provide EC based on construction drawings for mobile homes which has no drawings. I am trying to figure out what the owner needs to furnish me. Have any of you run across this and what do you require.
In accordance with FEMA bulletins, I report the proposed floor elevation and then list the proposed slab grade under the comments section. HAG & LAG would be the same if the trailer is on a conc slab. Also note use of tie-downs and type of proposed skirting
Here ia quick cut and paste
Respectfully,
Jim Vianna
National Flood Insurance Program Floodplain Management
Bulletin
Page 18 of 20
16) Which diagram should be used for manufactured homes that have vinyl
or aluminum skirting?
If the vinyl or aluminum skirting is purely for decorative purposes, the skirting can be
disregarded and Diagram 5 can be used in both A and V Zones. However, if the area below the
manufactured home’s lowest floor is enclosed by something other than vinyl or aluminum skirting, it
may be an enclosure in which case Diagrams 6 or 8 may be more appropriate. The surveyor can note in
the Comments section whether the manufactured home includes vinyl or aluminum skirting. Openings
are not required if vinyl or aluminum skirting is used.
The local official should document on the permit whether skirting will be used or whether the area
below the manufactured home’s lowest floor will be an enclosure before issuing a permit. If an
enclosure is created below the manufactured home’s lowest floor, the enclosure can only be used for
parking, access, or storage. If the manufactured home is located in an A Zone, the enclosed area
must include openings [44 CFR 60.3(c)(5)]. If it is located in a V Zone, the area below the lowest
horizontal structural member of the lowest floor must be either free of obstruction or constructed
with non-supporting breakaway walls, open-wood lattice-work, or insect screening intended to
collapse under wind and water loads without causing collapse, displacement, or other structural
damage to the elevated portion of the manufactured home or supporting foundation system [44
CFR 60.3(e)(5)
Request the pier plans for the manufactured home. Sometimes they are called 'block plans' or 'anchor plans'. Check with the installer to see if they have any elevation plans.
DDSM:beer:
When I was doing those, I set a TBM on site with the flood elevation and provided the minimum vertical distance above flood the home needed to be set at and let the setup crews do their thing. When set on the blocks or foundation, I again visited and shot the floor elevation and measured the distance to the bottom of the structure, top of frame, usually they were good but a few needed to be lifted which was not a problem if they called me as soon as the home was at grade and I got there before the plumbing was connected. Always expected a minimum of two visits. Different requirements today, but providing what I did and then checking should have some value today. No longer do those things today.
jud
