What were the tabernacle's wooden frames set in?
The tabernacle's wooden frames were set in blocks of silver, not brass. The framework rested in huge blocks of pure silver. This detail contrasts with the outer fence, whose hangings were on silver, while the inner linen hung on golden hooks above the silver-set frames.
Les explains that after the inside linen was hung on golden hooks, the wood frame was set in blocks, not of brass, but of silver—huge blocks of silver. He notes that someone once tried to contemplate or interpolate the amount and came up with several tons of silver. Les says he will not claim that is true, but nevertheless the whole framework was set in blocks of pure silver.