Carpenter (CAR)

Fourth Period Package (32 Modules) Comments

Date: 12/19/2019 7:51:25 AM
Module: 020402b
Version: 22
Page:
Comment: In the new 4th period Curved Stair Module 020402d page 15, again it stats, “The run divided by number of treads equals the unit of run of the inside stringer.” The calculation it’s referring to in the unit run at the walk line and not the inside stringer. Earlier on the page it also references the run of the inside stringer while talking about Walk line.
Status: Approved

Date: 12/20/2019 7:06:13 AM
Module: 020402c
Version: 22
Page: 8, 9, 10
Comment: In the New Winder Stairs module 020402c, version 22. Page 8 has a walk line radius calculated as 506.11. This is rounded up to 507. On page 9 a walk line radius is calculated at 487.013 this one is rounded down. Page 10 Walk line radius is calculated as 534.76 and it’s rounded up. Examples continue throughout the module. Previously these values were always rounded up. We either need to use basic rounding rules or have a standard.
Status: Approved

Date: 12/20/2019 7:06:25 AM
Module: 020402c
Version: 22
Page: 9
Comment: In the New Winder Stairs module 020402c, version 22. Page 9 has a walk line radius calculated at 487mm and the note below it stats “Since the walk line is always considered to be 450 from the inside of the stair, the layout point for the winder nosings cannot be less than 450. Therefore the walk line radius = 450 With the new minimum unit run code of 255mm, a calculation that is less than 450 is no longer possible and these notes can now be deleted.
Status: Approved

Date: 5/31/2019 11:17:03 PM
Module: 020402d
Version: 4.0999999999999996
Page: 6
Comment: Module refers to min radius for curved treads of 1620. Where is this information from? is there a code reference?
Status: Approved

Date: 12/19/2019 7:48:40 AM
Module: 020402d
Version: 22
Page: 11
Comment: In the new 4th period Curved Stair Module 020402d on page 11, it stats, “The run divided by number of treads equals the unit of run of the inside stringer.” Although this statement is true the calculation it’s referring to in the unit run at the walk line and not the inside stringer. Earlier on the page it also references the run of the inside stringer.
Status: Approved

Date: 12/19/2019 7:49:00 AM
Module: 020402d
Version: 22
Page: 20
Comment: In the new 4th period Curved Stair Module 020402d page 20, it calculates the inside unit run as 137.2mm. Code minimum at the narrow end is 150mm. I feel using the 150mm to start the calculation would be a better way and then once calculated verify that the walk line unit run exceeds 255.
Status: Approved

Date: 1/8/2020 2:57:58 PM
Module: 020402d
Version: 22
Page: 11
Comment: In the new Curved Stair Module 020402d page 11 the calculated answer for walk line unit run is 375.87mm. This exceeds the private code maximum unit run of 355mm.
Status: Approved

Date: 1/9/2020 3:46:36 PM
Module: 020402d
Version: 22
Page: 2
Comment: In the New Curved Stair module 020202d on page 2 when listing code requirements for curved stairs, it stats; • The minimum dimension allowed at the narrow end of the tread is 150mm The 2015 National code book 9.8.4.3 stats, tapered treads shall have a run that is not less than 150mm at the narrow end of the tread. The module should be changed to match the actual code.
Status: Approved

Date: 1/10/2020 8:47:41 AM
Module: 020402d
Version: 22
Page: 7, 11, 19, 32
Comment: In the New Curved Stair module 020202d on page 7 it stats we will set up and solve ratios by cross multiplication. Page 11 when we should be setting up the ratio that step is seeming missed. Turn/360 = Partial Circle/Full Circle This same ratio set up can be used for calculations on page 19 where we’re given another set up and then again on page 32 where the students are presented a third set up where the ratio is flipped over for the same calculation. Consistently would help keep things clear for the students.
Status: Approved

Date: 1/10/2020 10:35:32 AM
Module: 020402d
Version: 22
Page: 28, 29
Comment: In the New Curved Stair module 020202d on page 28, it calculates the inside unit run as 314.2mm. Top of page 29 in a note, it stats; “In this example, because the inside unit run is already more than the minimum unit run (255mm) required at the walking line, you do not need to calculate the walk line unit run.” When you do check the walk line unit run it exceeds the maximum of 355mm. If this were public stairs it would be fine but the note would have to say (280mm) for public minimum.
Status: Approved

Date: 12/19/2019 11:58:57 AM
Module: 020404e
Version: 22
Page: 34/34
Comment: The process of rounding up the walking line radius calculation is not consistent in the questions. Objective 1 Q. 1-4 has the answer rounded but in q 5 and 6 it is done differently in each question. Also Page 3 the answer to unit run is 245. It should have the answer at or above the code min. 255.
Status: Approved