fendant's first requested instruction which stated the user of a manufactured product is not required to take added precautionary measures to make it safer but is authorized to use it in the condition as pur-chased from the manufacturer, ordinary wear and tear excepted, provided it is used in the manner and for the purpose for which it was manufactured. Also that the jury could not find defendant negligent for failing to make the bleachers safer by adding something thereto if they were being used in the manner and for the purpose for which they were manufactured.
Defendant's objection to the refusal of this re-quest asserted it allowed the jury to speculate as to a duty on defendant to improve a manufactured product whereas it was under no such duty.
The request appears to be based on language in Wagner v. Larson, 257 Iowa 1202, 1211, 1212, 136 N.W.2d 312, 318. Its abstract correctness may be assumed. However, we think the court was not required to so instruct and that to have done so would have injected into the case an issue not pleaded, as the case was submitted to the jury, and it might have led to confusion. Had the jury based recovery on defendant's failure to make the bleach-ers safer than when obtained from the manufacturer, it would have gone outside the court's instructions. See *1072 Hart v. Hinkley, 215 Iowa 915, 919, 247 N.W. 258; Murphy v. City of Waterloo, 255 Iowa 557, 566, 123 N.W.2d 49, 54.