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f': f / I :I /.( / j/ r j/ / :? // . . ! ~ 0 > . ! . , Some manufactured homes are designed for removal of the steel chassis when the manufac, tured home is placed on a permanent basement type foundation, The longitudinal I-beams are the main support- ing members for a manufactured home placed on an elevated foundation, as shown in Figure 1,3, The standard I-beam spacings are 75 1/2-, 82-, or 99-inches, :U~H~ :;;; Figure 1.3 I-Beams The floor decking material, which is attached to the floor joists. is usually wood particle board or plywood, The manufactured home walls are con- structed using wood studs with the exterior of the Figure 1.4 Double Section home generally of aluminum or wood siding, The roof/ceiling system is constructed using prefabricated roof trusses and a metal or wood/shingle exterior, The manufactured home mechanical and electrical system is completely built into the manufactured home during construc- tion, Installation of the manufactured home re- quires placement on a foundation system and con- nection to the required utilities, A double section, as shown in Figures 1.4 and 1,5, refers to a manufactured home that is gener- ally twice as wide as the normal 12 or 14 foot wide single unit. ..... ';:,......~.- ., ~', c-' .''''''-'H'.-.. ....:::.~, ,........'~.~' Figure 1.5 Double Section The design and construction of the chassislfloor system is comparable to the single section unit. Transported in two sections, the units are joined at the site on a foundation similar to those used for single section units. The design and construction of manufactured homes afa controlled through regulations of the U, S, Department of Housing and Urban Develop- ment (HUD), shown in Figure 1,6, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT Office .. the A......... 'ecr.'.ry tN' H_..I"I Pr.lI.etl.. .... lI.r.._.e C'...lt-.....,.1 H_..I... C.__I..I...r (........1 H...I.. .".llIls.,..I..) MOBILE HOME CONSTRUCTION AND SAFETY STANDARDS Figure 1.6 HUD Regulations 4