The ground bearing capacity should be greater than 4177lb/in2 (200 kN/sq.m).
(Additional grillage (foundations) will be required if softer banks are to be used.)
Bridge load capacity is for normal crossings MLC 96W and MLC 70T. For cautious
crossings, the load capacity is MLC 100W and MLC 80T.
This is carried out where it is not possible to take measurements with instruments and where access
to the far bank is not possible. Make best estimates of span and bank heights.
Deliberate reconnaissance should always be carried out where possible following
standard practice. Measure the gap by triangulation using an instrument or by a tape.
Determine the relative bank heights by means of a suitable instrument.
Refer to Figure 1. 11 and re-check the bridge gap (`AR' span) to make sure the bridge is
of sufficient length.
For additional information on Bridge Design, refer to Appendix I.
Determine the gap ('AR' span) to be spanned.
Determine the position of the launcher, dimension `A', from Table 1. 3 for build and Table
Determine the setting of the upper A-frame from Table 1. 5.
The bridge and launch beam configuration can be found from Table 1. 6.
Bridge length and configuration can be found from Table 1. 7.
Stabilizer leg pin positions can be found in Table 1. 8 for normal conditions and Table 1. 9