State two (2) precautions to be observed when it becomes necessary that a word lintel be used. – NABTEB QUESTION

ANSWER

(i) Ensure that the wood is hard
(ii) Make certain that the wood is free of defects
(iii) Ensure that the span of the opening is not too large.
(iv) Ensure that the lintel is not exposed to weather
(v) Make sure that the wood lintel is minimally loaded.
(vi) Use timber of large section.