Natalia,
The pdb's question is realated to WSF, so no 'depending which material you use', your reply may lead to un-needed questions about what can be sprued when the information is already out there.
Struts are maybe a part of a model, like as in struts joining upper and lower wing on a biplane, so, yes those struts are totally viable within the realms of a
single model, bars/beams/struts that join parts of a model or multiple models as
one model file may be called
sprues and likewise are all part of the single model presented for printing.
And, as well, please don't try to confuse WSF with SLS as they're both the same process. (this may lead to un-needed questions in the forum, when the answers are already on the material page)
Paul