1. “While, as a general rule, an independent contractor is liable for injuries caused by his own negligence or that of his servants in the course of his performance of the work or -in failing to leave the premises, in as safe a condition as they were found (65 C.J.S., p. 611, § 95), it is a well established general rule that, where the work of an independent contractor [or an architect] is completed, turned over to, and accepted by the owner, the contractor is not liable to third persons for damages or injuries subsequently suffered by reason of the condition of the work, even though he was negligent in carrying out the contract, at least, if the defect is not hidden but readily observable on reasonable inspection. 65 C.J.S. 613, § 95;
Young
*335
v.
Smith & Kelly Co.,
Therefore, in the present case, where the building constructed by the contractor under the direction and supervision of the architects had been completed and accepted by the owner, in order for the plaintiff’s petition to set forth a cause of action it must be shown that the work comes within one of the exceptions shown above.
2. The plaintiff’s petition charges that such landing and steps were a nuisance for which she could recover. As to such allegations this court is bound by the decision in
Stanley
v.
City of Macon,
95
Ga. App.
108, 112 (
3. The defendants rely on -such cases as Queen v. Craven, 95 Ga. App. 178, supra, which held that the plaintiff’s petition was subject to general demurrer where negligence was charged to a contractor who- had removed a porch from a dwelling house so that ¡a drop of seven feet from a doorway to the ground was created. That case did not hold that such situation could not be inherently or intrinsically dangerous or imminently dangerous to third persons, but only held that the plaintiff’s petition did not allege such facts and that the contractor was not liable in the absence of such allegations after completing his contract and turning back the premises to the plaintiff’s landlord.
The contention is made that there is nothing inherently or intrinsically or imminently dangerous about concrete landings and -steps, and that concrete landings and steps are in the same category as marble steps which under the decision of this court
*337
in the case of
Holloman
v.
Henry Grady Hotel Co.,
42
Ga. App.
347 (
While, under the holding of this court in
Holloman
v.
Henry Grady Hotel Co.,
42
Ga. App.
347, supra, marble is judicially recognized as a proper material from which to build stairways, and while under such decision marble is not naturally slick and dangerous even when polished and buffed, such decision is not authority for a holding that marble, when polished and buffed, is a proper material with which to build landings and stairways on the outside of buildings where each and every time it rains they will become wet. While in cases such as
Lebby
v.
Atlanta Realty Corp.,
25
Ga. App.
369 (
Marble is a stone which may be finished with a flat surface and used for stairs; it may be ground and buffed to a smooth finish, but if nothing is added to the stone it is still marble and under the above decisions is not naturally slick and dangerous. Concrete, to the contrary, is a mixture of cement and sand and sometimes other ingredients, such as steel or gravel, and the resulting texture and hardness of the finished product depend upon the ratios and quality of the ingredients placed therein as well as the finish placed thereon by the concreter. (See in this connection 15 C.J.S. p. 803; Webster’s New Inti. Dictionary, unabridged, 1957 Ed.), and while concrete is sometimes referred *338 to as stone it is not a stone in the same sense as marble. Accordingly, while marble is a proper material of which to build landings and steps and is not naturally slick and dangerous even when polished, and while concrete may be manufactured so that it is not naturally slick and dangerous, this court cannot take judicial cognizance that such a slick and dangerous finish cannot be placed on concrete.
The plaintiff’s petition alleged that due to excessive troweling with a steel trowel (rather than troweling with a wood float trowel or placing a steel abrasive hardener thereon), the concrete landing and steps were so slick when damp or wet with rain water, (such landing and steps being located on the outside of the building), that persons could not walk thereon without slipping, which condition was imminently dangerous to all third persons walking thereon when rain water was on such landing and steps. Accordingly, accepting as true, as we must when considering a petition on general demurrer, the allegations of the plaintiff’s petition (which are not impossible1,
Young
v.
Koger,
94
Ga. App.
524, 529;
4. The contention is made that in view of the allegations of the petition to the effect that the owner of the building could, by a reasonable inspection, have discovered such condition the defendants in the present case cannot be held liable because failure of the “owner” -to discover and correct the inherently dangerous condition was an intervening and therefore the “sole” proximate cause of the plaintiff’s injuries.
*339 This contention is without merit for, as was held in Davey v. Turner, 55 Ga. App. 786, supra, the owner of the realty and the contractor who installed an inherently dangerous appliance, a gas heater without a vent, were joint tortfeasors. The contractor was negligent, in that case, in installing the heater without a proper vent and the owner was negligent in not inspecting the heater to see if it had a proper vent to carry off the monoxide gas. Therefore, this contention of the defendants as to why their general demurrers were properly sustained is without merit.
5. The sole remaining contention is that the plaintiff’s petition shows that her alleged injuries were caused by her failure to exercise ordinary care for her own safety. This contention is based on the theory that the plaintiff’s petition shows that “by a reasonable inspection” the owner of the building could have determined that the landing and steps were not safe and that therefore if the plaintiff had looked at the steps she too could have determined that they were not safe and have chosen a safer exit from the building. In support of this position the defendants rely on cases exemplified by Lebby v. Atlanta Realty Corp., 25 Ga. App. 369, supra, where the plaintiff in leaving an office slipped and fell when he attempted to walk down a hall, the floor of which was covered with water preparatory to mopping it, and it was held that the danger, if any, was obvious to the plaintiff and he could have discovered it in the exercise of ordinary care for his own safety.
In the present case the rain water was on a concrete landing and steps located on the outside of a building, which landing and steps were constructed, presumably, with knowledge that whenever it rained they would become wet, and it cannot be said that the plaintiff, as a matter of law, was not exercising ordinary care for her own safety where, as here, she entered such building when such landing and steps were diy and after a rain, which took place while she was inside the building, she fell and was injured while leaving the building by way of the slippery concrete steps. “An invitee is not obliged to inspect the premises to discover latent defects nor even to observe all patent defects.
Lane Drug Stores v. Brooks, 70 Ga. App.
878 [29
*340
S. E. 2d 716].”
Misenhamer
v.
Pharr,
99
Ga. App.
163, 166 (
Judgments reversed.
