Question

1) Benefits realized on this project by utilizing a mass timber design scheme when compared to the original steel design included:

a. Reduced floor to floor height

b. Longer floor panel/slab spans

c. Easier MEP coordination

d. All of the above

2) Glue-laminated timber was used for which components on the UMass Design Building: (choose all that apply)

a. Only beams

b. Beams and columns

c. Beams, columns and braced frames

d. Only braced frames

3) Cross-Laminated Timber (CLT) can only be used for horizontal surfaces (floors and roofs), not for walls:

a. True

b. False

4) CLT-concrete composite floor systems utilize each material in its most efficient manner to provide: (choose all that apply)

a. Stiffer floor panels capable of longer spans

b. Lower panel mass

c. Quicker installation

d. Easier building code approval

5) The inherent mass and charring characteristics of mass timber sections allow them to be exposed while achieving fire-resistance without the need for coatings or protection layers such as gypsum:

a. True

b. False

6) The timber zipper roof trusses over the lower level lobby provide which building feature:

a. Steep slope roofs for adequate snow shedding

b. An accessible green roof above the open lobby

c. Crane rails utilized in the wood testing labs

d. Seismic load resistance as shear walls

7) The beam to column connections on the UMass Design Building utilized: (choose all that apply)

a. Large exposed steel gusset plate connections with through bolts

b. Traditional timber frame joinery

c. Steel hangers concealed by the timber for fire-resistance purposes

d. Lag screws and knife plates

Answer 1

Solution

1) Benefits realized on this project by utilizing a mass timber design scheme when compared to the original steel design included:

a)Reduced floor to floor height

As the lenght of timber is less as compared to steel construction frames which are made in factory according to height required and withuse of timber MEP process coordination becomes diffiult and also smaller floor panel / slab spans thus option A is correct.

2) Glue-laminated timber was used for which components on the UMass Design Building:

b) Only beams and columns

Glue-laminated timber are used only for beams and columns and are not used for braced columns due to ow bending strength of glue laminated timber

3) Cross-Laminated Timber (CLT) can only be used for horizontal surfaces (floors and roofs), not for walls:

FALSE

As cross laminated timber as high strength that's why it can be used for both horizontal and verical surfaces.

4) CLT-concrete composite floor systems utilize each material in its most efficient manner to provide:

Lower panel mass AND Quicker installation

As Clt panels are ligher in weight and thus are quicker to install but have more building code approval required and smaller spans can be made not longer one

5) The inherent mass and charring characteristics of mass timber sections allow them to be exposed while achieving fire-resistance without the need for coatings or protection layers such as gypsum:

FALSE
Fire resistance without timber can't sustain for a long time thus usually a gypsum layer protection is provided to provide fire resistance to wood.

6) The timber zipper roof trusses over the lower level lobby provide which building feature

a. Steep slope roofs for adequate snow shedding

As the tomber zipper roof trusses can't bear a heavy load such as used for crane rails amd seismic loads thus they are used fro snow shedding

7) The beam to column connections on the UMass Design Building utilized:

a. Large exposed steel gusset plate connections with through bolts d. Lag screws and knife plates

as in UMass design timber frame is used thus to strengthen it large exposed steel gusset plate are used with large bolts and lag screws and knife plates are also used.