Hazvitore ruzivo rwakawandisa usati wadzidza kuti humwe chaihwo hwemhando dzomukati dzakasiyana zvakasiyana nehuwandu hwemashoko hwavanosarudzwa. Semuenzaniso, 2x4 inonyanya 1-1 / 2 "ne 3- 1/2" muhukuru, nepo bhokisi re1x6, kana richienzaniswa, rinoratidza kuva 3/4 "x 5-1 / 2" chaiyo ukuru. Uye izvi ndezvechokwadi kune dzakawanda zvematanda zvaunotenga - zviyero zvakakwana zvichaderedzwa zvichibva pamusana wezita iyo iyo matanda inotsanangurwa.
Nei izvi zvakadaro? Heino gwaro rakabudiswa neUS US Forest Service rine Nhoroondo yeYard Lumber Size Standards (munaSeptember 1964). Kunyange zvazvo chirongwa ichi chave nemakore anopfuura makumi mana, ikozvino inopa nhoroondo inonakidza yekuti nei uye nei miti yakaderedzwa kubva pamusana wevanhu vakawanda (2x4, somuenzaniso) kumasikirwo chaiwo anoshandiswa nhasi.