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Single-Storey Frames, Shells and Lightweight Coverings 201<br />

6° dual pitch lattice beam<br />

Hollow rectangular<br />

section top chord<br />

Angle cleat<br />

welded to<br />

top chord<br />

End plate<br />

welded to<br />

hollow sections<br />

Figure 4.42 Lattice beam.<br />

Hollow square<br />

section lattice<br />

members welded<br />

Hollow rectangular<br />

to top and<br />

section bottom<br />

bottom chords<br />

chord<br />

Prismatic (V beam) lattice steel girders<br />

spaced up to 4.5 apart with decking or<br />

roof lights between beams<br />

Prismatic<br />

girder<br />

up to 24.0<br />

Steel<br />

columns<br />

Girders span between<br />

lattice or solid beams<br />

Figure 4.43 Prismatic (V beam) lattice steel roof on steel columns.

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