Fabrication Mathematics Roof Truss 2003

3 Pages·2003·0.03 MB·English

§.29 Basic method of laying-out templates
for a roof truss

sing the intormastion supplieg on the drawings lines eegrseenting
the roof truss are mazked out on the floor, ‘lo use proper align
rere of holes chrongh Lomplues, the buen (Lemplates repracenting
‘he avige sections) are rilled sind laid va plate Lemplates in the
comest position on the lines on the Tluvr, The holes in the plate
fomplates are tnaezxed {rom the hole pusilions in the battens, and
then dried, "The ‘tll or ‘buch’ holos are marked in postion For the
pilin cleats and shoe connections,

“Afterthe totaplites have been checked fur accuracy by raplacing
fon the lay-oub lines, they arv marked up ready for use by the
fabricator. The edge of each batten template to be set agcinst the
tual uf the angle section it merked! with c ling cloce to that edge

Figure 3.26 shows 2 layout for a simple rot tras together
with information an iow the various “emplates employed sre mare:
op.
Mes

wit

ae seed Sls teil

Figuce 5.25(a) shows a eypical template for marking our columns
‘axe Universal besres,

First, centre lines are marked on the web at both onus uf the
section tor the purpee of luratirg with the eencte line marked on
the template

Second, the Lamplate is laid or che surface uf Uke tom flange
‘With the respective ceive lines alignod a8 shuwa in Pig, 526(5)
clamped in position, and che plain ands Rules marked through wilh
4 alpple punch,

‘This nrocedhce fs cepeated for Ube hottom flange where the
plsin and‘ holos ae marked thraugh,

Finally, che beam is laid with the web horizontal om the gantey,
aml che web holes ‘C" marked chrough ia Uhe same manner, as shown
in Fig. 525),
Fig..26 Use of tamplater fr

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