Splice STEEL BLOCK and LATTICE BACKGROUND to make STEEL GIRDER. STEEL GIRDER is in platforms category. Growing STEEL GIRDER takes 1d 11h 08m 20s. Nice experience you find in these blocks. How many times you need to hit it? Head to the wiki for more info: <a href="https://growtopia.fandom.com/wiki/Steel_Girder">steel girder</a> Seed mathematics is very complicated, but you should get at least 1 seed back from splicing STEEL GIRDER. Gemratio of STEEL GIRDER is a mystery. Maybe you can check the wiki for <a href="https://growtopia.fandom.com/wiki/Steel_Girder">steel girder</a> Massproducing STEEL GIRDER can be tricky. You will find out after you have harvested a few.