Forward movement.

TM 38-400/NAVSUP PUB 572/AFMAN 23-210 MCO 4450.14/DLAM 4145.12

All loads will be balanced in the vehicle lengthwise and

crosswise before the vehicle is released. Precautions

will be taken to prevent vertical movement because of

sudden stops or travel over rough terrain, as vertical

movement can cause the breakdown of good blocking

and bracing practices. If the load is not tight or is out of

alignment, the unbalanced loading will cause unequal

pressures. The use of bulkheads, separation gates,

dividers (lengthwise and crosswise), layer separations,

runners, blocks, cleats, and strapping properly

fabricated and applied, will eliminate or prevent all load

movement.

(2) Forward movement. Forward movement

can be prevented by shoring firmly against the front or

nose bulkhead. The front bulkhead serves to square the

load and to distribute load pressures over the frontal

area of the vehicle rather than just at points of contact.

When a vehicle, furnished by the motor carriers, has a

Figure 3-33. Front bulkhead.

rounded or streamlined front end or an end other than

square and the material to be loaded is a critical item, a

delicate or fragile item, or an item that requires special

protection and straight alignment to assure safe arrival

at destinations, front bulkheads of a type and size

compatible with the weight and type of commodity to be

shipped may be used. A typical nose or front bulkhead

is shown by figure 3-33. Front bulkhead detail and

installation is shown by figures 3-34 and 3-35. The use

of front bulkheads is not necessary in square nose

trailers or vans unless the nose of the trailer or van has

been bulged by forward load movement in previous

shipments. If such a condition exists and the material to

be shipped falls in the category previously outlined, the

front bulkhead should be used.

Figure 3-34. Front bulkhead-positioned in trailer,

detail of bulkhead.

3-66