Clarifications.pdf

SOLICITATION CLARIFICATIONS

Question 1) I do not think this has been addressed yet but in speaking with my stainless steel cable provider the 6’ centers are in excess of recommended span of 42”. The choice would be to add additional posts or a flat bar divider welded to the top of the pipe to be a cable guide.

Answer: Intermediate post has been added for guardrails. Reference revised Detail 1 on Sheet A8.

Question 2) In attachment 2 (Section C)- Part 1.1- background, it states that the ramp and stairs should meet all ADAIABAAS codes. Should the ramp and stairs also comply with IBC 2012 and ANSI.A117.1.2009?

The specific code references for IBC Section 1012 Handrails; Section 1013 Guards; Section 1607.8.1 Load Criteria. The specific reference for ANSI is Chapter 5 (504- Stairways; 505- Handrails).

Answer: Yes, the ramp and stair railings should comply with IBC and ANSI codes as well as ABAAS. The codes are similar.

Question 3) With the existing post spacing at 6' on center, could you confirm that 1-112" schedule 40- 316L stainless pipe will meet the code prescribed load requirements?

Answer: Yes, 6ft centers is acceptable for handrails. GUARDRAILS will have an intermediate post installed between the pipe posts to better support cables (see new detail sheet A8).

Question 4) In the project manual, section 05 52 00- 2.6.3 indicates 3/16-inch braided stainless steel cable.

Please confirm the cable should be 1/19 in 316 alloy?

Answer: Yes, the cable shall be 1-by-19 cable conforming to ASTM A492, Type 316.

Question 5) The specified cable spacing is indicated as 3-7/8" O.C. This spacing should be reduced to 3" O.C.

in order to meet code restriction of prohibiting a 4" sphere from passing through. Even with full tension applied on the cables, at 3-7/8" O.C., there will be enough movement of the cable to push a 4' ball through

Answer: The cable spacing has been reduced to 3-1/8" O.C. in order to space the cables evenly (see new detail). This spacing will allow a 2-15/16" opening between cables (see new detail sheet A8)..

Question 6) We have a concern with Amendment 2 that maybe you can help with. See attached detail and below excerpt, but we believe that recessing the collar at the post hole will compromise the integrity of the concrete and may create cracking that is not controllable and inevitable (both during the coring and chipping activities, and long term use) – particularly considering the age and finish of the concrete.

Answer/Clarification: The post flanges (collars) shall not be recessed in the concrete, but shall rest on top of the concrete surface with no gaps. The pipe post flanges shall be welded to the posts with no bolts. The plate post flanges shall be welded to the posts and shall be bolted to the concrete surface with (2) recessed (flush) bolts. The welds shall be neat Type 2 welds (see new detail sheet A8).